1339631Sphilip# tzdb data for North and Central America and environs 2339631Sphilip 3192886Sedwin# This file is in the public domain, so clarified as of 4192886Sedwin# 2009-05-17 by Arthur David Olson. 5153761Swollman 62742Swollman# also includes Central America and the Caribbean 72742Swollman 8273719Sedwin# This file is by no means authoritative; if you think you know better, 92742Swollman# go ahead and edit the file (and please send any changes to 10273719Sedwin# tz@iana.org for general use in the future). For more, please see 11273719Sedwin# the file CONTRIBUTING in the tz distribution. 122742Swollman 13149514Swollman# From Paul Eggert (1999-03-22): 142742Swollman# A reliable and entertaining source about time zones is 1558787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 162742Swollman 172742Swollman############################################################################### 182742Swollman 192742Swollman# United States 202742Swollman 2158787Sru# From Paul Eggert (1999-03-31): 2258787Sru# Howse writes (pp 121-125) that time zones were invented by 2358787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2458787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 25257697Sedwin# His pamphlet "A System of National Time for Railroads" (1870) 2658787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2758787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2858787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2958787Sru 30331663Sphilip# From Paul Eggert (2018-03-20): 31307913Sbapt# Dowd's proposal left many details unresolved, such as where to draw 32307913Sbapt# lines between time zones. The key individual who made time zones 33307913Sbapt# work in the US was William Frederick Allen - railway engineer, 34307913Sbapt# managing editor of the Travelers' Guide, and secretary of the 35307913Sbapt# General Time Convention, a railway standardization group. Allen 36307913Sbapt# spent months in dialogs with scientific and railway leaders, 37307913Sbapt# developed a workable plan to institute time zones, and presented it 38307913Sbapt# to the General Time Convention on 1883-04-11, saying that his plan 39307913Sbapt# meant "local time would be practically abolished" - a plus for 40307913Sbapt# railway scheduling. By the next convention on 1883-10-11 nearly all 41331663Sphilip# railroads had agreed and it took effect on 1883-11-18. That Sunday 42331663Sphilip# was called the "day of two noons", as some locations observed noon 43331663Sphilip# twice. Allen witnessed the transition in New York City, writing: 44307913Sbapt# 45307913Sbapt# I heard the bells of St. Paul's strike on the old time. Four 46307913Sbapt# minutes later, obedient to the electrical signal from the Naval 47307913Sbapt# Observatory ... the time-ball made its rapid descent, the chimes 48307913Sbapt# of old Trinity rang twelve measured strokes, and local time was 49307913Sbapt# abandoned, probably forever. 50307913Sbapt# 51307913Sbapt# Most of the US soon followed suit. See: 52307913Sbapt# Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. 53339631Sphilip# https://dx.doi.org/10.2307/3105430 54307913Sbapt 55149514Swollman# From Paul Eggert (2005-04-16): 56149514Swollman# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 57149514Swollman# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 58149514Swollman 59158421Swollman# From Paul Eggert (2006-03-22): 6014343Swollman# A good source for time zone historical data in the US is 6114343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 6214343Swollman# San Diego: ACS Publications, Inc. (1991). 6314343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 64158421Swollman# It is the source for most of the pre-1991 US entries below. 6514343Swollman 6675267Swollman# From Paul Eggert (2001-03-06): 6717200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 68257697Sedwin# in his whimsical essay "An Economical Project for Diminishing the Cost 69257697Sedwin# of Light" published in the Journal de Paris (1784-04-26). 7017200Swollman# Not everyone is happy with the results: 7117200Swollman# 7217200Swollman# I don't really care how time is reckoned so long as there is some 7317200Swollman# agreement about it, but I object to being told that I am saving 7417200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 7517200Swollman# I even object to the implication that I am wasting something 7617200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 7717200Swollman# of moonlight I resent the bossy insistence of those who want to 7817200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 7917200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 8017200Swollman# to push people into bed earlier, and get them up earlier, to make 8117200Swollman# them healthy, wealthy and wise in spite of themselves. 8217200Swollman# 83270817Spluknet# -- Robertson Davies, The diary of Samuel Marchbanks, 84149514Swollman# Clarke, Irwin (1947), XIX, Sunday 8575267Swollman# 8675267Swollman# For more about the first ten years of DST in the United States, see 87270817Spluknet# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 88273719Sedwin# (Carnegie Library of Pittsburgh, 1927). 89273719Sedwin# http://www.clpgh.org/exhibit/dst.html 9075267Swollman# 9175267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 9275267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 9375267Swollman# was the first nationwide legal time standard, and apparently 9475267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 9517200Swollman 962742Swollman# From Arthur David Olson: 972742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 9819878Swollman# See, for example, the front page of the Saturday, 1974-10-26 9919878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 1002742Swollman 1012742Swollman# From Arthur David Olson: 1022742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 1032742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 1042742Swollman 10567578Swollman# From Arthur David Olson (2000-09-25): 10667578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 10767578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 108273719Sedwin# An AltaVista search turned up: 109325160Sphilip# https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html 11067578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 11167578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 112270817Spluknet# (August 1945) by way of confirmation. 113325160Sphilip# 114325160Sphilip# From Paul Eggert (2017-09-23): 115325160Sphilip# This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter. 11667578Swollman 117149514Swollman# From Joseph Gallant citing 11867578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 11967578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 12086222Swollman# to switch to London for Attlee's address, but the American people 12167578Swollman# never got to hear his speech live. According to one press account, 12267578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 12367578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 12467578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 12586222Swollman# London which were to precede Mr. Attlee's speech. 12667578Swollman 127114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 128114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 129114173Swollman# 130114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 131114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 132114173Swollman# wire service teletype machine, which had prescribed signals for major news. 133114173Swollman# Associated Press, for example, would ring five bells before spewing out 134114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 135114173Swollman# importance." 136114173Swollman# 137114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 138114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 139114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 140114173Swollman# The Japanese have agreed to our surrender terms." 141114173Swollman# 142114173Swollman# He had scored a 20-second scoop on other broadcasters. 143114173Swollman 144149590Swollman# From Arthur David Olson (2005-08-22): 145149590Swollman# Paul has been careful to use the "US" rules only in those locations 146149590Swollman# that are part of the United States; this reflects the real scope of 147149590Swollman# U.S. government action. So even though the "US" rules have changed 148149590Swollman# in the latest release, other countries won't be affected. 149149590Swollman 1502742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15175267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1522742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1532742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 15467578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 155279707SedwinRule US 1945 only - Sep lastSun 2:00 0 S 156149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1572742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1582742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1592742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1602742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 161149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 162149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 163149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1642742Swollman 165153761Swollman# From Arthur David Olson, 2005-12-19 166153761Swollman# We generate the files specified below to guard against old files with 167153761Swollman# obsolete information being left in the time zone binary directory. 168153761Swollman# We limit the list to names that have appeared in previous versions of 169153761Swollman# this time zone package. 170153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 171153761Swollman# a particular place changes whether it observes DST. 172153761Swollman# We put these specifications here in the northamerica file both to 173153761Swollman# increase the chances that they'll actually get compiled and to 174153761Swollman# avoid the need to duplicate the US rules in another file. 175153761Swollman 176153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 177153761SwollmanZone EST -5:00 - EST 178153761SwollmanZone MST -7:00 - MST 179153761SwollmanZone HST -10:00 - HST 180153761SwollmanZone EST5EDT -5:00 US E%sT 181153761SwollmanZone CST6CDT -6:00 US C%sT 182153761SwollmanZone MST7MDT -7:00 US M%sT 183153761SwollmanZone PST8PDT -8:00 US P%sT 184153761Swollman 18519878Swollman# From U. S. Naval Observatory (1989-01-19): 1862742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1872742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1882742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1892742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1902742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1912742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1922742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1932742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1942742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1952742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1962742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 197270817Spluknet# USA " 9 H BEHIND UTC APR 3 - OCT 30 1982742Swollman# USA HAWAII 10 H BEHIND UTC 1992742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 2002742Swollman 20119878Swollman# From Arthur David Olson (1989-01-21): 2022742Swollman# The above dates are for 1988. 2032742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 2042742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 2052742Swollman# Aleutians. 2062742Swollman 20719878Swollman# From Arthur David Olson (1988-02-13): 2082742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 2092742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 21019878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 2112742Swollman# took effect), as explained in sections 263 and 261: 2122742Swollman# (none) 2132742Swollman# United States standard eastern time 2142742Swollman# United States standard mountain time 2152742Swollman# United States standard central time 2162742Swollman# United States standard Pacific time 2172742Swollman# (none) 2182742Swollman# United States standard Alaska time 2192742Swollman# (none) 22019878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2212742Swollman# public law 98-181): 2222742Swollman# Atlantic standard time 2232742Swollman# eastern standard time 2242742Swollman# central standard time 2252742Swollman# mountain standard time 2262742Swollman# Pacific standard time 2272742Swollman# Yukon standard time 2282742Swollman# Alaska-Hawaii standard time 2292742Swollman# Bering standard time 23019878Swollman# And after 1983-11-30: 2312742Swollman# Atlantic standard time 2322742Swollman# eastern standard time 2332742Swollman# central standard time 2342742Swollman# mountain standard time 2352742Swollman# Pacific standard time 2362742Swollman# Alaska standard time 2372742Swollman# Hawaii-Aleutian standard time 2382742Swollman# Samoa standard time 2392742Swollman# The law doesn't give abbreviations. 24014343Swollman# 241316350Sbapt# From Paul Eggert (2016-12-19): 242316350Sbapt# Here are URLs for the 1918 and 1966 legislation: 243316350Sbapt# http://uscode.house.gov/statviewer.htm?volume=40&page=451 244316350Sbapt# http://uscode.house.gov/statviewer.htm?volume=80&page=108 245316350Sbapt# Although the 1918 names were officially "United States Standard 246316350Sbapt# Eastern Time" and similarly for "Central", "Mountain", "Pacific", 247316350Sbapt# and "Alaska", in practice "Standard" was placed just before "Time", 248316350Sbapt# as codified in 1966. In practice, Alaska time was abbreviated "AST" 249316350Sbapt# before 1968. Summarizing the 1967 name changes: 250316350Sbapt# 1918 names 1967 names 251316350Sbapt# -08 Standard Pacific Time (PST) Pacific standard time (PST) 252316350Sbapt# -09 (unofficial) Yukon (YST) Yukon standard time (YST) 253316350Sbapt# -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) 254316350Sbapt# -11 (unofficial) Nome (NST) Bering standard time (BST) 255316350Sbapt# 25675267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 257283080Sedwin# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" 258283080Sedwin# for time in Guam and the Northern Marianas. See the file "australasia". 259283080Sedwin# 260283080Sedwin# From Paul Eggert (2015-04-17): 261283080Sedwin# HST and HDT are standardized abbreviations for Hawaii-Aleutian 262283080Sedwin# standard and daylight times. See section 9.47 (p 234) of the 263283080Sedwin# U.S. Government Printing Office Style Manual (2008) 264325160Sphilip# https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 265158421Swollman 266149514Swollman# From Arthur David Olson, 2005-08-09 267149514Swollman# The following was signed into law on 2005-08-08. 268149514Swollman# 269149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 270270817Spluknet# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 271149514Swollman# U.S.C. 260a(a)) is amended-- 272270817Spluknet# (1) by striking "first Sunday of April" and inserting "second 273270817Spluknet# Sunday of March"; and 274270817Spluknet# (2) by striking "last Sunday of October" and inserting "first 275149514Swollman# Sunday of November'. 276270817Spluknet# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 277149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 278270817Spluknet# (c) Report to Congress.--Not later than 9 months after the effective 279149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 280149514Swollman# on the impact of this section on energy consumption in the United 281149514Swollman# States. 282270817Spluknet# (d) Right to Revert.--Congress retains the right to revert the 283149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 284149514Swollman# Department study is complete. 2852742Swollman 28686222Swollman# US eastern time, represented by New York 28775267Swollman 28867578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 289149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 290149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 291114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 292114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 293114173Swollman# Vermont, Virginia, West Virginia 29467578Swollman 295149514Swollman# From Dave Cantor (2004-11-02): 296149514Swollman# Early this summer I had the occasion to visit the Mount Washington 297149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 298149514Swollman# One of the staff members said that the station was on Eastern Standard Time 299149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 300149514Swollman# reports will always have times which are 5 hours behind UTC. 301149514Swollman 302153670Swollman# From Paul Eggert (2005-08-26): 303153670Swollman# According to today's Huntsville Times 304273719Sedwin# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 305153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 306153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 307153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 308153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 309153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 310158421Swollman# in Columbus." 311316350Sbapt# 312316350Sbapt# From Paul Eggert (2017-02-22): 313316350Sbapt# Four cities are involved. The two not mentioned above are Smiths Station 314316350Sbapt# and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started 315316350Sbapt# because West Point Pepperell textile mills were in Alabama while the 316316350Sbapt# corporate office was in Georgia, and residents voted to keep Eastern 317316350Sbapt# time even after the mills closed. See: Kazek K. Did you know which 318316350Sbapt# Alabama towns are in a different time zone? al.com 2017-02-06. 319316350Sbapt# http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html 320153670Swollman 321273719Sedwin# From Paul Eggert (2014-09-06): 322273719Sedwin# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 323273719Sedwin# says that New York City Hall time was 3 minutes 58.4 seconds fast of 324273719Sedwin# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 325273719Sedwin# nearest second. 326273719Sedwin 32714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 32814343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 32914343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 33014343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 33114343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 33214343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 33314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 334149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 33514343Swollman -5:00 US E%sT 1920 33614343Swollman -5:00 NYC E%sT 1942 33714343Swollman -5:00 US E%sT 1946 33814343Swollman -5:00 NYC E%sT 1967 33914343Swollman -5:00 US E%sT 3402742Swollman 34186222Swollman# US central time, represented by Chicago 34267578Swollman 343136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 344136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 345136638Swollman# Washington counties), Illinois, western Indiana 346114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 347114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 348114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 349114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 350114173Swollman# western Tennessee, most of Texas, Wisconsin 35167578Swollman 352328476Sphilip# From Paul Eggert (2018-01-07): 353328476Sphilip# In 1869 the Chicago Astronomical Society contracted with the city to keep 354328476Sphilip# time. Though delayed by the Great Fire, by 1880 a wire ran from the 355328476Sphilip# Dearborn Observatory (on the University of Chicago campus) to City Hall, 356328476Sphilip# which then sent signals to police and fire stations. However, railroads got 357328476Sphilip# their time signals from the Allegheny Observatory, the Madison Observatory, 358328476Sphilip# the Ann Arbor Observatory, etc., so their clocks did not agree with each 359328476Sphilip# other or with the city's official time. The confusion took some years to 360328476Sphilip# clear up. See: 361328476Sphilip# Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04. 362328476Sphilip# http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/ 363328476Sphilip 364158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 365325160Sphilip# https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf 366158421Swollman# is currently enforced at the 01:00 time of change. Because the local 367158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 368158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 369158421Swollman# hours" within the deviated hour of this change every year.... 370169811Swollman# 371169811Swollman# From Douglas R. Bomberg (2007-03-12): 372169811Swollman# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 373169811Swollman# Statue 175 closer in synch with the US Congress' intent.... 374325160Sphilip# https://docs.legis.wisconsin.gov/2007/related/acts/3 375158421Swollman 376307362Sbapt# From an email administrator of the City of Fort Pierre, SD (2015-12-21): 377307362Sbapt# Fort Pierre is technically located in the Mountain time zone as is 378307362Sbapt# the rest of Stanley County. Most of Stanley County and Fort Pierre 379307362Sbapt# uses the Central time zone due to doing most of their business in 380307362Sbapt# Pierre so it simplifies schedules. I have lived in Stanley County 381307362Sbapt# all my life and it has been that way since I can remember. (43 years!) 382307362Sbapt# 383307362Sbapt# From Paul Eggert (2015-12-25): 384307362Sbapt# Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 385307362Sbapt 38614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 38714343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 38814343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 38914343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 39014343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 39114343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 39214343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 39314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 394149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 39514343Swollman -6:00 US C%sT 1920 396273719Sedwin -6:00 Chicago C%sT 1936 Mar 1 2:00 397273719Sedwin -5:00 - EST 1936 Nov 15 2:00 39814343Swollman -6:00 Chicago C%sT 1942 39914343Swollman -6:00 US C%sT 1946 40014343Swollman -6:00 Chicago C%sT 1967 40114343Swollman -6:00 US C%sT 40286222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 403149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 404273719Sedwin -7:00 US M%sT 1992 Oct 25 2:00 40586222Swollman -6:00 US C%sT 406158421Swollman# Morton County, ND, switched from mountain to central time on 407158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 408158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 409158421Swollman# Officially this switch also included part of Sioux County, and 410158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 411158421Swollman# but in practice these other counties were already observing central time. 412158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 413273719SedwinZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 414273719Sedwin -7:00 US M%sT 2003 Oct 26 2:00 415158421Swollman -6:00 US C%sT 4162742Swollman 417219149Sedwin# From Josh Findley (2011-01-21): 418219149Sedwin# ...it appears that Mercer County, North Dakota, changed from the 419219149Sedwin# mountain time zone to the central time zone at the last transition from 420219149Sedwin# daylight-saving to standard time (on Nov. 7, 2010): 421325160Sphilip# https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 422219149Sedwin# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 423219149Sedwin 424219149Sedwin# From Andy Lipscomb (2011-01-24): 425219149Sedwin# ...according to the Census Bureau, the largest city is Beulah (although 426219149Sedwin# it's commonly referred to as Beulah-Hazen, with Hazen being the next 427219149Sedwin# largest city in Mercer County). Google Maps places Beulah's city hall 428331663Sphilip# at 47�� 15' 51" N, 101�� 46' 40" W, which yields an offset of 6h47'07". 429219149Sedwin 430273719SedwinZone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 431273719Sedwin -7:00 US M%sT 2010 Nov 7 2:00 432219149Sedwin -6:00 US C%sT 433219149Sedwin 43486222Swollman# US mountain time, represented by Denver 43567578Swollman# 436136638Swollman# Colorado, far western Kansas, Montana, western 43786222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 438171948Sedwin# New Mexico, southwestern North Dakota, 43975267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 44075267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 44167578Swollman# 442339940Sphilip# From Paul Eggert (2018-10-25): 443339940Sphilip# On 1921-03-04 federal law placed all of Texas into the central time zone. 444339940Sphilip# However, El Paso ignored the law for decades and continued to observe 445339940Sphilip# mountain time, on the grounds that that's what they had always done 446339940Sphilip# and they weren't about to let the federal government tell them what to do. 447339940Sphilip# Eventually the federal government gave in and changed the law on 448339940Sphilip# 1970-04-10 to match what El Paso was actually doing. Although 449339940Sphilip# that's slightly after our 1970 cutoff, there is no need to create a 450339940Sphilip# separate zone for El Paso since they were ignoring the law anyway. See: 451339940Sphilip# Long T. El Pasoans were time rebels, fought to stay in Mountain zone. 452339940Sphilip# El Paso Times. 2018-10-24 06:40 -06. 453339940Sphilip# https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ 454339940Sphilip# 45514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 45614343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 45714343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 45814343SwollmanRule Denver 1921 only - May 22 2:00 0 S 45914343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 46014343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 4612742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 462149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 46315309Swollman -7:00 US M%sT 1920 46415309Swollman -7:00 Denver M%sT 1942 46515309Swollman -7:00 US M%sT 1946 46615309Swollman -7:00 Denver M%sT 1967 46715309Swollman -7:00 US M%sT 4682742Swollman 46914343Swollman# US Pacific time, represented by Los Angeles 47067578Swollman# 471136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 472263046Sedwin# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 473263046Sedwin# north of the Salmon River, and the towns of Burgdorf and Warren), 474331663Sphilip# Nevada (except West Wendover), Oregon (except the northern �� of 475263046Sedwin# Malheur county), and Washington 476307362Sbapt 477307362Sbapt# From Paul Eggert (2016-08-20): 478307362Sbapt# In early February 1948, in response to California's electricity shortage, 479307362Sbapt# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, 480307362Sbapt# causing electric clocks to lose six minutes per day. (This did not change 481307362Sbapt# legal time, and is not part of the data here.) See: 482307362Sbapt# Ross SA. An energy crisis from the past: Northern California in 1948. 483307362Sbapt# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 484325160Sphilip# 1973-11. https://escholarship.org/uc/item/8x22k30c 48567578Swollman# 486307362Sbapt# In another measure to save electricity, DST was instituted from 1948-03-14 487307362Sbapt# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move 488307362Sbapt# the fallback transition earlier. See pages 3-4 of: 489307362Sbapt# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf 490307362Sbapt# 491307362Sbapt# In response: 492307362Sbapt# 493307362Sbapt# Governor Warren received a torrent of objecting mail, and it is not too much 494307362Sbapt# to speculate that the objections to Daylight Saving Time were one important 495307362Sbapt# factor in the defeat of the Dewey-Warren Presidential ticket in California. 496307362Sbapt# -- Ross, p 25 497307362Sbapt# 498307362Sbapt# On December 8 the governor exercised the option, setting the date to January 1 499307362Sbapt# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). 500307362Sbapt# 501307362Sbapt# Despite the controversy, in 1949 California voters approved Proposition 12, 502307362Sbapt# which established DST from April's last Sunday at 01:00 until September's 503307362Sbapt# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed 504307362Sbapt# the fall-back date to October's last Sunday. See: 505325160Sphilip# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props 506325160Sphilip# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props 507307362Sbapt# 50814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 509307362SbaptRule CA 1948 only - Mar 14 2:01 1:00 D 51014343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 511307362SbaptRule CA 1950 1966 - Apr lastSun 1:00 1:00 D 51214343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 51314343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 51414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 515149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 51614343Swollman -8:00 US P%sT 1946 51714343Swollman -8:00 CA P%sT 1967 51814343Swollman -8:00 US P%sT 5198029Swollman 52014343Swollman# Alaska 521316350Sbapt# AK%sT is the modern abbreviation for -09 per USNO. 52214343Swollman# 523325160Sphilip# From Paul Eggert (2017-06-15): 52414343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 52519878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 526325160Sphilip# On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the 527325160Sphilip# Russian forts and fleet at Sitka fired salutes to mark the ceremony of 528325160Sphilip# formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2. 529325160Sphilip# https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1 530325160Sphilip# Sitka workers did not change their calendars until Sunday, 1867-10-20, 531325160Sphilip# and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P). 532325160Sphilip# From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25. 533325160Sphilip# http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf 534325160Sphilip# Include only the time zone part of this transition, ignoring the switch 535325160Sphilip# from Julian to Gregorian, since we can't represent the Julian calendar. 53614343Swollman# 537325160Sphilip# As far as we know, of the locations mentioned below only Sitka was 53886222Swollman# permanently inhabited in 1867 by anyone using either calendar. 539325160Sphilip# (Yakutat was colonized by the Russians in 1799, but the settlement was 540325160Sphilip# destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants 541325160Sphilip# were unaware of the US acquisition of Alaska, much less of any calendar or 542325160Sphilip# time change. However, the Russian-influenced part of Alaska did observe 543325160Sphilip# Russian time, and it is more accurate to model this than to ignore it. 544325160Sphilip# The database format requires an exact transition time; use the Russian 545325160Sphilip# salute as a somewhat-arbitrary time for the formal transfer of control for 546325160Sphilip# all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the 547325160Sphilip# local times of other Alaskan locations so that they change simultaneously. 548219411Sedwin 549270817Spluknet# From Paul Eggert (2014-07-18): 550270817Spluknet# One opinion of the early-1980s turmoil in Alaska over time zones and 551270817Spluknet# daylight saving time appeared as graffiti on a Juneau airport wall: 552270817Spluknet# "Welcome to Juneau. Please turn your watch back to the 19th century." 553270817Spluknet# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 554270817Spluknet# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 555219411Sedwin# 556270817Spluknet# Steve Ferguson (2011-01-31) referred to the following source: 557270817Spluknet# Norris F. Keeping time in Alaska: national directives, local response. 558270817Spluknet# Alaska History 2001;16(1-2). 559270817Spluknet# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 560219411Sedwin 561219411Sedwin# From Arthur David Olson (2011-02-01): 562219411Sedwin# Here's database-relevant material from the 2001 "Alaska History" article: 563219411Sedwin# 564219411Sedwin# On September 20 [1979]...DOT...officials decreed that on April 27, 565219411Sedwin# 1980, Juneau and other nearby communities would move to Yukon Time. 566219411Sedwin# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 567219411Sedwin# Pacific Time. 568219411Sedwin# 569219411Sedwin# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 570219411Sedwin# Department's September 1979 decision. Juneau and other communities in 571219411Sedwin# northern Southeast reverted to Pacific Time on October 26. 572219411Sedwin# 573219411Sedwin# On October 28 [1983]...the Metlakatla Indian Community Council voted 574219411Sedwin# unanimously to keep the reservation on Pacific Time. 575219411Sedwin# 576219411Sedwin# According to DOT official Joanne Petrie, Indian reservations are not 577219411Sedwin# bound to follow time zones imposed by neighboring jurisdictions. 578219411Sedwin# 579219411Sedwin# (The last is consistent with how the database now handles the Navajo 580219411Sedwin# Nation.) 581219411Sedwin 582219411Sedwin# From Arthur David Olson (2011-02-09): 583219411Sedwin# I just spoke by phone with a staff member at the Metlakatla Indian 584219411Sedwin# Community office (using contact information available at 585219411Sedwin# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 586219411Sedwin# It's shortly after 1:00 here on the east coast of the United States; 587219411Sedwin# the staffer said it was shortly after 10:00 there. When I asked whether 588270817Spluknet# that meant they were on Pacific time, they said no - they were on their 589219411Sedwin# own time. I asked about daylight saving; they said it wasn't used. I 590219411Sedwin# did not inquire about practices in the past. 591219411Sedwin 592226289Sedwin# From Arthur David Olson (2011-08-17): 593226289Sedwin# For lack of better information, assume that Metlakatla's 594226289Sedwin# abandonment of use of daylight saving resulted from the 1983 vote. 595226289Sedwin 596307362Sbapt# From Steffen Thorsen (2015-11-09): 597307362Sbapt# It seems Metlakatla did go off PST on Sunday, November 1, changing 598307362Sbapt# their time to AKST and are going to follow Alaska's DST, switching 599307362Sbapt# between AKST and AKDT from now on.... 600325160Sphilip# https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 601307362Sbapt 602342669Sphilip# From Ryan Stanley (2018-11-06): 603342669Sphilip# The Metlakatla community in Alaska has decided not to change its 604342669Sphilip# clock back an hour starting on November 4th, 2018 (day before yesterday). 605342669Sphilip# They will be gmtoff=-28800 year-round. 606342669Sphilip# https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ 607342669Sphilip 608342669Sphilip# From Paul Eggert (2018-12-16): 609342669Sphilip# In a 2018-12-11 special election, Metlakatla voted to go back to 610342669Sphilip# Alaska time (including daylight saving time) starting next year. 611342669Sphilip# https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ 612345671Sphilip# 613345671Sphilip# From Ryan Stanley (2019-01-11): 614345671Sphilip# The community will be changing back on the 20th of this month... 615345671Sphilip# From Tim Parenti (2019-01-11): 616345671Sphilip# Per an announcement on the Metlakatla community's official Facebook page, the 617345671Sphilip# "fall back" will be on Sunday 2019-01-20 at 02:00: 618345671Sphilip# https://www.facebook.com/141055983004923/photos/607150969728753/ 619345671Sphilip# So they won't be waiting for Alaska to join them on 2019-03-10, but will 620345671Sphilip# rather change their clocks twice in seven weeks. 621342669Sphilip 62214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 623325160SphilipZone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32 62475267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 62514343Swollman -8:00 - PST 1942 62614343Swollman -8:00 US P%sT 1946 62714343Swollman -8:00 - PST 1969 628273719Sedwin -8:00 US P%sT 1980 Apr 27 2:00 629273719Sedwin -9:00 US Y%sT 1980 Oct 26 2:00 630273719Sedwin -8:00 US P%sT 1983 Oct 30 2:00 631136638Swollman -9:00 US Y%sT 1983 Nov 30 63214343Swollman -9:00 US AK%sT 633325160SphilipZone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30 634219411Sedwin -9:01:13 - LMT 1900 Aug 20 12:00 635219411Sedwin -8:00 - PST 1942 636219411Sedwin -8:00 US P%sT 1946 637219411Sedwin -8:00 - PST 1969 638273719Sedwin -8:00 US P%sT 1983 Oct 30 2:00 639219411Sedwin -9:00 US Y%sT 1983 Nov 30 640219411Sedwin -9:00 US AK%sT 641325160SphilipZone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55 642219411Sedwin -8:46:18 - LMT 1900 Aug 20 12:00 643219411Sedwin -8:00 - PST 1942 644219411Sedwin -8:00 US P%sT 1946 645219411Sedwin -8:00 - PST 1969 646273719Sedwin -8:00 US P%sT 1983 Oct 30 2:00 647307362Sbapt -8:00 - PST 2015 Nov 1 2:00 648342669Sphilip -9:00 US AK%sT 2018 Nov 4 2:00 649345671Sphilip -8:00 - PST 2019 Jan 20 2:00 650307362Sbapt -9:00 US AK%sT 651325160SphilipZone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18 65275267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 65314343Swollman -9:00 - YST 1942 65414343Swollman -9:00 US Y%sT 1946 65514343Swollman -9:00 - YST 1969 656136638Swollman -9:00 US Y%sT 1983 Nov 30 65714343Swollman -9:00 US AK%sT 658325160SphilipZone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37 65975267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 660316350Sbapt -10:00 - AST 1942 661316350Sbapt -10:00 US A%sT 1967 Apr 66214343Swollman -10:00 - AHST 1969 663273719Sedwin -10:00 US AH%sT 1983 Oct 30 2:00 664136638Swollman -9:00 US Y%sT 1983 Nov 30 66514343Swollman -9:00 US AK%sT 666325160SphilipZone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35 66775267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 66814343Swollman -11:00 - NST 1942 66914343Swollman -11:00 US N%sT 1946 67014343Swollman -11:00 - NST 1967 Apr 67114343Swollman -11:00 - BST 1969 672273719Sedwin -11:00 US B%sT 1983 Oct 30 2:00 673136638Swollman -9:00 US Y%sT 1983 Nov 30 67414343Swollman -9:00 US AK%sT 675325160SphilipZone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35 67675267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 67714343Swollman -11:00 - NST 1942 67814343Swollman -11:00 US N%sT 1946 67914343Swollman -11:00 - NST 1967 Apr 68014343Swollman -11:00 - BST 1969 681273719Sedwin -11:00 US B%sT 1983 Oct 30 2:00 682136638Swollman -10:00 US AH%sT 1983 Nov 30 683283080Sedwin -10:00 US H%sT 684149514Swollman# The following switches don't quite make our 1970 cutoff. 685149514Swollman# 68614343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 68714343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 68814343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 689149514Swollman# 690149514Swollman# From David Flater (2004-11-09): 691149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 692149514Swollman# Historic Preservation Commission, provided this information, which 693149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 694149514Swollman# possibly until 1983: 695149514Swollman# 696149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 697149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 698149514Swollman# location not on Alaska Standard Time. The following resolution was 699273719Sedwin# made by William Robinson and seconded by Henry Swanson: Be it 700149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 701149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 702149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 703149514Swollman# three votes for and one against." 7042742Swollman 70514343Swollman# Hawaii 706218122Sedwin 707218122Sedwin# From Arthur David Olson (2010-12-09): 708218122Sedwin# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 709218122Sedwin# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 710218122Sedwin# the article is available at 711325160Sphilip# https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 712218122Sedwin# and indicates that standard time was adopted effective noon, January 713218122Sedwin# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 714218122Sedwin# saving for the period between the last Sunday of each April and the 715218122Sedwin# last Sunday of each September, but less than a month later repealed the 716218122Sedwin# act," (page 220), that year-round daylight saving time was in effect 717218122Sedwin# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 718218122Sedwin# when clocks changed) and that clocks were changed by 30 minutes 719218122Sedwin# effective the second Sunday of June, 1947 (page 219, with no time of 720218122Sedwin# day given for when clocks changed). A footnote for the 1933 changes 721218122Sedwin# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 722218122Sedwin# and Act 163 (approved 21 May 1933)." 723218122Sedwin 724218122Sedwin# From Arthur David Olson (2011-01-19): 725218122Sedwin# The following is from "Laws of the Territory of Hawaii Passed by the 726218122Sedwin# Seventeenth Legislature: Regular Session 1933," available (as of 727218122Sedwin# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 728218122Sedwin# 90...At 2 o'clock ante meridian of the last Sunday in April of each 729218122Sedwin# year, the standard time of this Territory shall be advanced one 730218122Sedwin# hour...This Act shall take effect upon its approval. Approved this 26th 731218122Sedwin# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 732273719Sedwin# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 733218122Sedwin# hereby repealed...This Act shall take effect upon its approval, upon 734218122Sedwin# which date the standard time of this Territory shall be restored to 735218122Sedwin# that existing immediately prior to the taking effect of said Act 90. 736218122Sedwin# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 737218122Sedwin# of the Territory of Hawaii." 73814343Swollman# 739218122Sedwin# Note that 1933-05-21 was a Sunday. 740218122Sedwin# We're left to guess the time of day when Act 163 was approved; guess noon. 741218122Sedwin 742273719Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 743273719SedwinZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 744273719Sedwin -10:30 - HST 1933 Apr 30 2:00 745273719Sedwin -10:30 1:00 HDT 1933 May 21 12:00 746339940Sphilip -10:30 US H%sT 1947 Jun 8 2:00 74714343Swollman -10:00 - HST 748257697Sedwin 74914343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 75014343Swollman 75114343Swollman# Arizona mostly uses MST. 752114173Swollman 753114173Swollman# From Paul Eggert (2002-10-20): 754114173Swollman# 755114173Swollman# The information in the rest of this paragraph is derived from the 756270817Spluknet# Daylight Saving Time web page 757270817Spluknet# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 758270817Spluknet# maintained by the Arizona State Library, Archives and Public Records. 759114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 760114173Swollman# time, but by federal law railroads, airlines, bus lines, military 761114173Swollman# personnel, and some engaged in interstate commerce continued to 762114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 763114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 764114173Swollman# the date the state's clocks would change. In 1945 the State of 765114173Swollman# Arizona used standard time all year, again with exceptions only as 766114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 767114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 768114173Swollman# 769114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 770114173Swollman# Go with the Arizona State Library instead. 771114173Swollman 772273719Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 773149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 774273719Sedwin -7:00 US M%sT 1944 Jan 1 0:01 775273719Sedwin -7:00 - MST 1944 Apr 1 0:01 776273719Sedwin -7:00 US M%sT 1944 Oct 1 0:01 77714343Swollman -7:00 - MST 1967 778114173Swollman -7:00 US M%sT 1968 Mar 21 77914343Swollman -7:00 - MST 78019878Swollman# From Arthur David Olson (1988-02-13): 78114343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 782136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 7832742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 7842742Swollman# large size and location in three states." (The "only" means that other 7852742Swollman# tribal nations don't use DST.) 786257697Sedwin# 787257697Sedwin# From Paul Eggert (2013-08-26): 788257697Sedwin# See America/Denver for a zone appropriate for the Navajo Nation. 7892742Swollman 790136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 791136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 792136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 793136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 794171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 795171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 796136638Swollman# switched four weeks late in 1974. 797149514Swollman# 79814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 799149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 800273719Sedwin -8:00 US P%sT 1923 May 13 2:00 80114343Swollman -7:00 US M%sT 1974 802273719Sedwin -7:00 - MST 1974 Feb 3 2:00 80314343Swollman -7:00 US M%sT 8042742Swollman 80514343Swollman# Indiana 80614343Swollman# 80758787Sru# For a map of Indiana's time zone regions, see: 808325160Sphilip# https://en.wikipedia.org/wiki/Time_in_Indiana 80958787Sru# 810342669Sphilip# From Paul Eggert (2018-11-30): 811342669Sphilip# A brief but entertaining history of time in Indiana describes a 1949 debate 812342669Sphilip# in the Indiana House where city legislators (who favored "fast time") 813342669Sphilip# tussled with farm legislators (who didn't) over a bill to outlaw DST: 814342669Sphilip# "Lacking enough votes, the city faction tries to filibuster until time runs 815342669Sphilip# out on the session at midnight, but rural champion Rep. Herbert Copeland, 816342669Sphilip# R-Madison, leans over the gallery railing and forces the official clock 817342669Sphilip# back to 9 p.m., breaking it in the process. The clock sticks on 9 as the 818342669Sphilip# debate rages on into the night. The filibuster finally dies out and the 819342669Sphilip# bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, 820342669Sphilip# it doesn't matter which side won. The law has no enforcement powers and 821342669Sphilip# is simply ignored by fast-time communities." 822342669Sphilip# How Indiana went from 'God's time' to split zones and daylight-saving. 823342669Sphilip# Indianapolis Star. 2018-11-27 14:58 -05. 824342669Sphilip# https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ 825342669Sphilip# 826171948Sedwin# From Paul Eggert (2007-08-17): 827149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 828149590Swollman# with the following exceptions: 829149590Swollman# 830149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 831270817Spluknet# Vanderburgh, and Warrick counties have been like America/Chicago. 832149590Swollman# 833149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 834149590Swollman# 835149590Swollman# - Clark, Floyd, and Harrison counties have been like 836149590Swollman# America/Kentucky/Louisville. 837149590Swollman# 838171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 839171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 840158421Swollman# 841158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 842257697Sedwin# and wrote "Even newspaper reports present contradictory information." 843158421Swollman# Those Hoosiers! Such a flighty and changeable people! 84414343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 84514343Swollman# 84614343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 847257697Sedwin# that they would be ambiguous if we left them at the 'America' level. 848257697Sedwin# So we reluctantly put them all in a subdirectory 'America/Indiana'. 84975267Swollman 850270817Spluknet# From Paul Eggert (2014-06-26): 851270817Spluknet# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 852270817Spluknet# says "DOT is relocating the time zone boundary in Indiana to move Starke, 853158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 854158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 855270817Spluknet# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 856158421Swollman# changeover date from standard time to Daylight Saving Time." 857270817Spluknet# Strictly speaking, this meant the affected counties changed their 858270817Spluknet# clocks twice that night, but this obviously was in error. The intent 859270817Spluknet# was that 01:59:59 EST be followed by 02:00:00 CDT. 860158421Swollman 861169811Swollman# From Gwillim Law (2007-02-10): 862169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 863169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 864169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 865169811Swollman 86614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 86714343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 86814343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 86914343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 87014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 871273719SedwinZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 87214343Swollman -6:00 US C%sT 1920 87314343Swollman -6:00 Indianapolis C%sT 1942 87414343Swollman -6:00 US C%sT 1946 875273719Sedwin -6:00 Indianapolis C%sT 1955 Apr 24 2:00 876273719Sedwin -5:00 - EST 1957 Sep 29 2:00 877273719Sedwin -6:00 - CST 1958 Apr 27 2:00 87814343Swollman -5:00 - EST 1969 87914343Swollman -5:00 US E%sT 1971 880149514Swollman -5:00 - EST 2006 881149514Swollman -5:00 US E%sT 8822742Swollman# 883158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 884158421Swollman# as well as from 1976 through 2005. 88514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 88614343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 88714343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 88814343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 88914343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 89014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 891149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 89214343Swollman -6:00 US C%sT 1951 893273719Sedwin -6:00 Marengo C%sT 1961 Apr 30 2:00 89414343Swollman -5:00 - EST 1969 895273719Sedwin -5:00 US E%sT 1974 Jan 6 2:00 896273719Sedwin -6:00 1:00 CDT 1974 Oct 27 2:00 89714343Swollman -5:00 US E%sT 1976 898149514Swollman -5:00 - EST 2006 899149514Swollman -5:00 US E%sT 90014343Swollman# 901171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 902171948Sedwin# switched from eastern to central time in April 2006, then switched back 903171948Sedwin# in November 2007. 904158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 905158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 906158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 907158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 908158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 909158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 910158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 911158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 912158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 913158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 914158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 915158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 916158421Swollman -6:00 US C%sT 1946 917273719Sedwin -6:00 Vincennes C%sT 1964 Apr 26 2:00 918158421Swollman -5:00 - EST 1969 919158421Swollman -5:00 US E%sT 1971 920273719Sedwin -5:00 - EST 2006 Apr 2 2:00 921273719Sedwin -6:00 US C%sT 2007 Nov 4 2:00 922171948Sedwin -5:00 US E%sT 923171948Sedwin# 924171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 925171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 926171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 927171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 928171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 929171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 930171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 931171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 932171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 933171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 934171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 935171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 936171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 937171948Sedwin -6:00 US C%sT 1946 938273719Sedwin -6:00 Perry C%sT 1964 Apr 26 2:00 939171948Sedwin -5:00 - EST 1969 940171948Sedwin -5:00 US E%sT 1971 941273719Sedwin -5:00 - EST 2006 Apr 2 2:00 942158421Swollman -6:00 US C%sT 943158421Swollman# 944158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 945171948Sedwin# then switched back in 2006, then switched back again in 2007. 946158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 947158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 948158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 949158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 950158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 951158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 952158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 953158421Swollman -6:00 US C%sT 1955 954273719Sedwin -6:00 Pike C%sT 1965 Apr 25 2:00 955273719Sedwin -5:00 - EST 1966 Oct 30 2:00 956273719Sedwin -6:00 US C%sT 1977 Oct 30 2:00 957273719Sedwin -5:00 - EST 2006 Apr 2 2:00 958273719Sedwin -6:00 US C%sT 2007 Nov 4 2:00 959171948Sedwin -5:00 US E%sT 960158421Swollman# 961158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 962158421Swollman# then switched back in 2006. 96319878Swollman# From Arthur David Olson (1991-10-28): 96419878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 96514343Swollman# notes that Starke County switched from Central time to Eastern time as of 96619878Swollman# 1991-10-27. 96714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 96814343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 96914343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 97014343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 97114343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 97214343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 97314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 974149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 97514343Swollman -6:00 US C%sT 1947 976273719Sedwin -6:00 Starke C%sT 1962 Apr 29 2:00 977273719Sedwin -5:00 - EST 1963 Oct 27 2:00 978273719Sedwin -6:00 US C%sT 1991 Oct 27 2:00 979273719Sedwin -5:00 - EST 2006 Apr 2 2:00 980158421Swollman -6:00 US C%sT 98114343Swollman# 982169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 983169811Swollman# April 2006 and then switched back in March 2007. 984169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 985169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 986169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 987169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 988169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 989169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 990169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 991169811Swollman -6:00 US C%sT 1946 992273719Sedwin -6:00 Pulaski C%sT 1961 Apr 30 2:00 993169811Swollman -5:00 - EST 1969 994169811Swollman -5:00 US E%sT 1971 995273719Sedwin -5:00 - EST 2006 Apr 2 2:00 996273719Sedwin -6:00 US C%sT 2007 Mar 11 2:00 997169811Swollman -5:00 US E%sT 998169811Swollman# 999158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 100014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1001149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 1002273719Sedwin -6:00 US C%sT 1954 Apr 25 2:00 100314343Swollman -5:00 - EST 1969 100414343Swollman -5:00 US E%sT 1973 1005149514Swollman -5:00 - EST 2006 1006149514Swollman -5:00 US E%sT 10072742Swollman 1008331663Sphilip# From Paul Eggert (2018-03-20): 1009331663Sphilip# The Louisville & Nashville Railroad's 1883-11-18 change occurred at 1010331663Sphilip# 10:00 old local time; train were supposed to come to a standstill 1011331663Sphilip# for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not 1012331663Sphilip# clear how this matched civil time in Louisville, so for now continue 1013331663Sphilip# to assume Louisville switched at noon new local time, like New York. 1014331663Sphilip# 101514343Swollman# Part of Kentucky left its clocks alone in 1974. 1016149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 101714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 101814343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 101914343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 102014343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 102114343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 102214343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 102314343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 102414343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 102514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1026149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 102714343Swollman -6:00 US C%sT 1921 102814343Swollman -6:00 Louisville C%sT 1942 102914343Swollman -6:00 US C%sT 1946 1030273719Sedwin -6:00 Louisville C%sT 1961 Jul 23 2:00 103114343Swollman -5:00 - EST 1968 1032273719Sedwin -5:00 US E%sT 1974 Jan 6 2:00 1033273719Sedwin -6:00 1:00 CDT 1974 Oct 27 2:00 103414343Swollman -5:00 US E%sT 103567578Swollman# 1036158421Swollman# Wayne County, Kentucky 103758787Sru# 1038270817Spluknet# From Lake Cumberland LIFE 1039273719Sedwin# http://www.lake-cumberland.com/life/archive/news990129time.shtml 1040270817Spluknet# (1999-01-29) via WKYM-101.7: 104158787Sru# Clinton County has joined Wayne County in asking the DoT to change from 104258787Sru# the Central to the Eastern time zone.... The Wayne County government made 104358787Sru# the same request in December. And while Russell County officials have not 104458787Sru# taken action, the majority of respondents to a poll conducted there in 104558787Sru# August indicated they would like to change to "fast time" also. 104658787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 104758787Sru# location in the Central time zone. 104867578Swollman# 104967578Swollman# From Rich Wales (2000-08-29): 105067578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 105167578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 105275267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 105375267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 105486222Swollman# 105586222Swollman# From Paul Eggert (2001-07-16): 105686222Swollman# The final rule was published in the 1057270817Spluknet# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 1058325160Sphilip# https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm 1059114173Swollman# 1060149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 106167578Swollman -6:00 US C%sT 1946 106267578Swollman -6:00 - CST 1968 106367578Swollman -6:00 US C%sT 2000 Oct 29 2:00 106467578Swollman -5:00 US E%sT 10652742Swollman 106667578Swollman 106767578Swollman# From Rives McDow (2000-08-30): 106867578Swollman# Here ... are all the changes in the US since 1985. 106967578Swollman# Kearny County, KS (put all of county on central; 107067578Swollman# previously split between MST and CST) ... 1990-10 107167578Swollman# Starke County, IN (from CST to EST) ... 1991-10 107267578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 107367578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 107467578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 107567578Swollman# 107686222Swollman# From Paul Eggert (2001-07-17): 107786222Swollman# We don't know where the line used to be within Kearny County, KS, 107886222Swollman# so omit that change for now. 107986222Swollman# See America/Indiana/Knox for the Starke County, IN change. 108086222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 108186222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 108286222Swollman# 1999-10-31. See the 1083270817Spluknet# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 1084325160Sphilip# https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm 108586222Swollman# However, the Federal Register says that West Wendover already operated 108686222Swollman# on mountain time, and the rule merely made this official; 108786222Swollman# hence a separate tz entry is not needed. 108867578Swollman 108914343Swollman# Michigan 109014343Swollman# 109119878Swollman# From Bob Devine (1988-01-28): 109214343Swollman# Michigan didn't observe DST from 1968 to 1973. 109314343Swollman# 109458787Sru# From Paul Eggert (1999-03-31): 109558787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 109658787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 109758787Sru# that Detroit kept 109814343Swollman# 109914343Swollman# local time until 1900 when the City Council decreed that clocks should 110014343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 110114343Swollman# city obeyed, half refused. After considerable debate, the decision 110214343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 110314343Swollman# erect a sundial in front of the city hall was referred to the 110414343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 110514343Swollman# by city vote. 110614343Swollman# 110714343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 110814343Swollman# 110975267Swollman# From Paul Eggert (2001-03-06): 1110257697Sedwin# Garland (1927) writes "Cleveland and Detroit advanced their clocks 1111257697Sedwin# one hour in 1914." This change is not in Shanks. We have no more 111275267Swollman# info, so omit this for now. 111375267Swollman# 1114325160Sphilip# From Paul Eggert (2017-07-26): 1115325160Sphilip# Although Shanks says Detroit observed DST in 1967 from 06-14 00:01 1116325160Sphilip# until 10-29 00:01, I now see multiple reports that this is incorrect. 1117325160Sphilip# For example, according to a 50-year anniversary report about the 1967 1118325160Sphilip# Detroit riots and a major-league doubleheader on 1967-07-23, "By the time 1119325160Sphilip# the last fly ball of the doubleheader settled into the glove of leftfielder 1120325160Sphilip# Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving 1121325160Sphilip# time, so light was already starting to fail. Twilight was made even deeper 1122325160Sphilip# by billowing columns of smoke that ascended in an unbroken wall north of the 1123325160Sphilip# ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two 1124325160Sphilip# at home vs. Yankees. Detroit Free Press 2017-07-23. 1125325160Sphilip# https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/ 1126325160Sphilip# 112714343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 112814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 112914343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 113014343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 113114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 113214343SwollmanZone America/Detroit -5:32:11 - LMT 1905 1133273719Sedwin -6:00 - CST 1915 May 15 2:00 113414343Swollman -5:00 - EST 1942 113514343Swollman -5:00 US E%sT 1946 113614343Swollman -5:00 Detroit E%sT 1973 113714343Swollman -5:00 US E%sT 1975 1138273719Sedwin -5:00 - EST 1975 Apr 27 2:00 113914343Swollman -5:00 US E%sT 114014343Swollman# 1141158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 1142158421Swollman# switched from EST to CST/CDT in 1973. 114314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 114414343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 114514343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 114614343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 114714343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 114814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 114914343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 115014343Swollman -6:00 US C%sT 1946 1151273719Sedwin -6:00 Menominee C%sT 1969 Apr 27 2:00 1152273719Sedwin -5:00 - EST 1973 Apr 29 2:00 115314343Swollman -6:00 US C%sT 115414343Swollman 11552742Swollman# Navassa 115686222Swollman# administered by the US Fish and Wildlife Service 115743543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 115843543Swollman# also claimed by Haiti 115943543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 116086222Swollman# US lighthouse 1917/1996-09 116143543Swollman# currently uninhabited 1162257697Sedwin# see Mark Fineman, "An Isle Rich in Guano and Discord", 116343543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 116443543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 116514343Swollman 11662742Swollman################################################################################ 11672742Swollman 11682742Swollman 1169316350Sbapt# From Paul Eggert (2017-02-10): 1170274563Sedwin# 1171274563Sedwin# Unless otherwise specified, the source for data through 1990 is: 1172158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1173158421Swollman# San Diego: ACS Publications, Inc. (2003). 1174274563Sedwin# Unfortunately this book contains many errors and cites no sources. 11752742Swollman# 1176316350Sbapt# Many years ago Gwillim Law wrote that a good source 1177316350Sbapt# for time zone data was the International Air Transport 117820094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 117920094Swollman# published semiannually. Law sent in several helpful summaries 1180274563Sedwin# of the IATA's data after 1990. Except where otherwise noted, 1181274563Sedwin# IATA SSIM is the source for entries after 1990. 118220094Swollman# 1183121098Swollman# Other sources occasionally used include: 11842742Swollman# 1185121098Swollman# Edward W. Whitman, World Time Differences, 1186121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1187121098Swollman# which I found in the UCLA library. 1188121098Swollman# 1189121098Swollman# William Willett, The Waste of Daylight, 19th edition 1190267477Sedwin# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1191267477Sedwin# [PDF] (1914-03) 1192121098Swollman# 1193248307Sedwin# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1194325160Sphilip# <https://www.jstor.org/stable/1774359>. 1195248307Sedwin# 1196257697Sedwin# See the 'europe' file for Greenland. 11972742Swollman 11982742Swollman# Canada 11992742Swollman 1200270817Spluknet# From Alain LaBont�� (1994-11-14): 12019908Swollman# I post here the time zone abbreviations standardized in Canada 12029908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 12039908Swollman# 1204270817Spluknet# UTC Standard time Daylight saving time 12059908Swollman# offset French English French English 12069908Swollman# -2:30 - - HAT NDT 12079908Swollman# -3 - - HAA ADT 12089908Swollman# -3:30 HNT NST - - 12099908Swollman# -4 HNA AST HAE EDT 12109908Swollman# -5 HNE EST HAC CDT 12119908Swollman# -6 HNC CST HAR MDT 12129908Swollman# -7 HNR MST HAP PDT 12139908Swollman# -8 HNP PST HAY YDT 12149908Swollman# -9 HNY YST - - 12159908Swollman# 12169908Swollman# HN: Heure Normale ST: Standard Time 1217270817Spluknet# HA: Heure Avanc��e DT: Daylight saving Time 12189908Swollman# 12199908Swollman# A: de l'Atlantique Atlantic 12209908Swollman# C: du Centre Central 12219908Swollman# E: de l'Est Eastern 12229908Swollman# M: Mountain 12239908Swollman# N: Newfoundland 12249908Swollman# P: du Pacifique Pacific 12259908Swollman# R: des Rocheuses 12269908Swollman# T: de Terre-Neuve 12279908Swollman# Y: du Yukon Yukon 12289908Swollman# 1229149514Swollman# From Paul Eggert (1994-11-22): 12309908Swollman# Alas, this sort of thing must be handled by localization software. 12312742Swollman 1232273719Sedwin# Unless otherwise specified, the data entries for Canada are all from Shanks 1233158421Swollman# & Pottenger. 12349908Swollman 1235169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1236169811Swollman# 2007-03-01): 1237158421Swollman# The British Columbia government announced yesterday that it will 1238158421Swollman# adjust daylight savings next year to align with changes in the 1239158421Swollman# U.S. and the rest of Canada.... 1240325160Sphilip# https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm 1241169811Swollman# ... 1242169811Swollman# Nova Scotia 1243163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 1244325160Sphilip# https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf 1245169811Swollman# 1246163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 1247163302Sru# be done at 02:00 instead of 00:01. 1248325160Sphilip# https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1249163302Sru# ... 1250163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 1251163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 1252325160Sphilip# https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1253163302Sru# ... 1254163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 1255169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1256163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1257169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1258163302Sru# ... 1259169811Swollman# P.E.I. will follow US rules.... 1260169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1261163302Sru# ... 1262169811Swollman# Province of Newfoundland and Labrador.... 1263169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1264163302Sru# ... 1265169811Swollman# Yukon 1266325160Sphilip# https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1267169811Swollman# ... 1268163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 1269163302Sru# does not seem to believe in bookmarks. To see the news release, click the 1270163302Sru# following link and search for "Daylight Savings Time Change". Press the 1271163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 1272163302Sru# JavaScript. 1273163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1274169811Swollman# ... 1275169811Swollman# Nunavut 1276169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 1277169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1278163302Sru 1279273719Sedwin# From Paul Eggert (2014-10-18): 128067578Swollman# H. David Matthews and Mary Vincent's map 128167578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1282273719Sedwin# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1283270817Spluknet# contains detailed boundaries for regions observing nonstandard 128467578Swollman# time and daylight saving time arrangements in Canada circa 1998. 128567578Swollman# 1286273719Sedwin# National Research Council Canada maintains info about time zones and DST. 1287325160Sphilip# https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1288325160Sphilip# https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 128967578Swollman# Its unofficial information is often taken from Matthews and Vincent. 12909908Swollman 1291163302Sru# From Paul Eggert (2006-06-27): 1292163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1293163302Sru# new US DST rules, 1294163302Sru 1295233445Sedwin# From Chris Walton (2011-12-01) 1296233445Sedwin# In the first of Tammy Hardwick's articles 1297233445Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1298233445Sedwin# she quotes the Friday November 1/1918 edition of the Creston Review. 1299233445Sedwin# The quote includes these two statements: 1300233445Sedwin# 'Sunday the CPR went back to the old system of time...' 1301233445Sedwin# '... The daylight saving scheme was dropped all over Canada at the same time,' 1302233445Sedwin# These statements refer to a transition from daylight time to standard time 1303233445Sedwin# that occurred nationally on Sunday October 27/1918. This transition was 1304233445Sedwin# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1305233445Sedwin 1306233445Sedwin# In light of that evidence, we alter the date from the earlier believed 1307233445Sedwin# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1308233445Sedwin# than Thursday) in all Canadian rulesets. 1309233445Sedwin 13102742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 131117200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 1312233445SedwinRule Canada 1918 only - Oct 27 2:00 0 S 1313121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1314121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 131517200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 131617200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1317153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1318153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1319153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1320153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 132117200Swollman 132217200Swollman 1323163302Sru# Newfoundland and Labrador 132417200Swollman 1325325160Sphilip# From Paul Eggert (2017-10-14): 1326325160Sphilip# Legally Labrador should observe Newfoundland time; see: 1327325160Sphilip# McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 1328325160Sphilip# http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ 1329325160Sphilip# Matthews and Vincent (1998) write that the only part of Labrador 1330325160Sphilip# that follows the rules is the southeast corner, including Port Hope 1331325160Sphilip# Simpson and Mary's Harbour, but excluding, say, Black Tickle. 133267578Swollman 133317200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1334121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 13352742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1336158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 13372742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 13382742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1339158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 13402742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 13412742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1342158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1343158421Swollman# Pottenger. 1344121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1345121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1346121098Swollman# Whitman gives the following transitions: 1347121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1348158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 13492742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1350158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 13512742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 13522742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 13532742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 13542742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 135567578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 135667578Swollman# From Paul Eggert (2000-10-02): 135767578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 135867578Swollman# at 00:01 local time. For now, assume it started in 1987. 1359226289Sedwin 1360226289Sedwin# From Michael Pelley (2011-09-12): 1361226289Sedwin# We received today, Monday, September 12, 2011, notification that the 1362226289Sedwin# changes to the Newfoundland Standard Time Act have been proclaimed. 1363226289Sedwin# The change in the Act stipulates that the change from Daylight Savings 1364226289Sedwin# Time to Standard Time and from Standard Time to Daylight Savings Time 1365226289Sedwin# now occurs at 2:00AM. 1366226289Sedwin# ... 1367226289Sedwin# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1368226289Sedwin# ... 1369226289Sedwin# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1370226289Sedwin# Office of the Chief Information Officer 1371226289Sedwin# Executive Council 1372226289Sedwin# Government of Newfoundland & Labrador 1373226289Sedwin 137467578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1375158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 137667578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1377158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1378226289SedwinRule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1379226289SedwinRule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1380158421Swollman# 13812742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 13822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13832742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1384121098Swollman -3:30:52 StJohns N%sT 1918 1385121098Swollman -3:30:52 Canada N%sT 1919 138620094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1387121098Swollman -3:30 StJohns N%sT 1942 May 11 1388121098Swollman -3:30 Canada N%sT 1946 1389226289Sedwin -3:30 StJohns N%sT 2011 Nov 1390226289Sedwin -3:30 Canada N%sT 13912742Swollman 139267578Swollman# most of east Labrador 139317200Swollman 1394257697Sedwin# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 139520094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 139620094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1397121098Swollman -3:30:52 - NST 1918 1398121098Swollman -3:30:52 Canada N%sT 1919 139920094Swollman -3:30:52 - NST 1935 Mar 30 140020094Swollman -3:30 - NST 1936 1401121098Swollman -3:30 StJohns N%sT 1942 May 11 1402121098Swollman -3:30 Canada N%sT 1946 1403273719Sedwin -3:30 StJohns N%sT 1966 Mar 15 2:00 1404226289Sedwin -4:00 StJohns A%sT 2011 Nov 1405226289Sedwin -4:00 Canada A%sT 140620094Swollman 140720094Swollman 1408158421Swollman# west Labrador, Nova Scotia, Prince Edward I 140920094Swollman 1410286751Sedwin# From Brian Inglis (2015-07-20): 1411286751Sedwin# From the historical weather station records available at: 1412286751Sedwin# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 1413286751Sedwin# Sydney shares the same time history as Glace Bay, so was 1414286751Sedwin# likely to be the same across the island.... 1415286751Sedwin# Sydney, as the capital and most populous location, or Cape Breton, would 1416286751Sedwin# have been better names for the zone had we known this in 1996. 1417286751Sedwin 1418286751Sedwin# From Paul Eggert (2015-07-20): 1419158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1420158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 1421286751Sedwin# the Cape Breton area, represented by Glace Bay, is the largest we know of 1422286751Sedwin# (Glace Bay was perhaps not the best name choice but no point changing now). 1423158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1424158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1425158421Swollman# this is a typo. 142617200Swollman 14272742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1428158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1429158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1430158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1431158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1432158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1433158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1434158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1435158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1436158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1437158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1438158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1439158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1440158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1441158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1442158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1443158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1444158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1445158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1446158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1447158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1448158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1449158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1450158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1451158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1452158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1453158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1454158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1455158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1456158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1457158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1458158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1459158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1460158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1461158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1462158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1463158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1464158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1465158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1466158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1467158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1468158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 14692742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14702742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1471121098Swollman -4:00 Halifax A%sT 1918 1472121098Swollman -4:00 Canada A%sT 1919 1473273719Sedwin -4:00 Halifax A%sT 1942 Feb 9 2:00s 1474121098Swollman -4:00 Canada A%sT 1946 1475121098Swollman -4:00 Halifax A%sT 1974 1476121098Swollman -4:00 Canada A%sT 147717200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 147817200Swollman -4:00 Canada A%sT 1953 147917200Swollman -4:00 Halifax A%sT 1954 148017200Swollman -4:00 - AST 1972 1481121098Swollman -4:00 Halifax A%sT 1974 1482121098Swollman -4:00 Canada A%sT 14832742Swollman 1484158421Swollman# New Brunswick 14858029Swollman 1486169811Swollman# From Paul Eggert (2007-01-31): 1487169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1488169811Swollman# says they changed at 00:01 through 2006, and 1489158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1490169811Swollman# clear that this was the case since at least 1993. 1491163302Sru# For now, assume it started in 1993. 1492158421Swollman 1493158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1494158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1495158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1496158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1497158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1498158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1499158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1500158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1501158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1502158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1503158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1504158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1505158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1506158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1507158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1508158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1509158421Swollman -5:00 - EST 1902 Jun 15 1510158421Swollman -4:00 Canada A%sT 1933 1511158421Swollman -4:00 Moncton A%sT 1942 1512158421Swollman -4:00 Canada A%sT 1946 1513158421Swollman -4:00 Moncton A%sT 1973 1514158421Swollman -4:00 Canada A%sT 1993 1515163302Sru -4:00 Moncton A%sT 2007 1516163302Sru -4:00 Canada A%sT 1517158421Swollman 1518163302Sru# Quebec 151917200Swollman 1520283043Sedwin# From Paul Eggert (2015-03-24): 1521283043Sedwin# See America/Toronto for most of Quebec, including Montreal. 1522283043Sedwin# 1523163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1524163302Sru# meridian is supposed to observe AST, but residents as far east as 1525163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1526257697Sedwin# The Quebec department of justice writes in 1527270817Spluknet# "The situation in Minganie and Basse-C��te-Nord" 1528257697Sedwin# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1529257697Sedwin# that the coastal strip from just east of Natashquan to Blanc-Sablon 1530257697Sedwin# observes Atlantic standard time all year round. 1531325160Sphilip# https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1532163302Sru# says this common practice was codified into law as of 2007. 1533163302Sru# For lack of better info, guess this practice began around 1970, contra to 1534163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1535163302Sru 1536163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1537163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1538163302Sru -4:00 Canada A%sT 1970 1539163302Sru -4:00 - AST 1540163302Sru 1541163302Sru# Ontario 1542163302Sru 1543163302Sru# From Paul Eggert (2006-07-09): 1544163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1545163302Sru# Toronto. 154617200Swollman# Thunder Bay skipped DST in 1973. 154717200Swollman# Many smaller locales did not observe peacetime DST until 1974; 154817200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 154917200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 155017200Swollman 1551121098Swollman# From Mark Brader (2003-07-26): 1552121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1553121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1554121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1555121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1556121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1557121098Swollman# hostility from certain segments of the public, and was revoked after 1558270817Spluknet# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1559121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1560121098Swollman# earlier in June). 1561121098Swollman# 1562121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1563325160Sphilip# 1564325160Sphilip# From Paul Eggert (2017-07-08): 1565325160Sphilip# For more on Orillia, see: Daubs K. Bold attempt at daylight saving 1566325160Sphilip# time became a comic failure in Orillia. Toronto Star 2017-07-08. 1567325160Sphilip# https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html 1568121098Swollman 156943014Swollman# From Paul Eggert (1997-10-17): 1570121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 157143014Swollman# says that Atikokan, Ontario currently does not observe DST, 157243014Swollman# but will vote on 11-10 whether to use EST/EDT. 1573270817Spluknet# He also writes that the Ontario Time Act (1990, Chapter T.9) 1574273719Sedwin# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 157543014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 157643014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 157743014Swollman# concerns a non-official time observed as a matter of local practice. 1578158421Swollman# 157967578Swollman# From Paul Eggert (2000-10-02): 158067578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 158167578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 158267578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 158367578Swollman# violation of the official Ontario rules. 1584163302Sru# 1585163302Sru# From Paul Eggert (2006-07-09): 1586163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1587163302Sru# 2005-07-21 Chronicle-Journal, which said: 1588163302Sru# 1589163302Sru# The clocks in Atikokan stay set on standard time year-round. 1590163302Sru# This means they spend about half the time on central time and 1591163302Sru# the other half on eastern time. 1592163302Sru# 1593163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1594163302Sru# 1595163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1596163302Sru# Canada, but there are some that deal with Western Canada," he 1597163302Sru# said. "I don't see any changes happening here." 1598163302Sru# 1599163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1600163302Sru# [New Osnaburgh] follow the same practice." 160167578Swollman 1602163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1603163302Sru# I chatted with a member of my board who has an outstanding memory 1604163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1605163302Sru# can say for certain that Atikokan has been practicing the current 1606163302Sru# time keeping since 1952, at least. 1607163302Sru 1608163302Sru# From Paul Eggert (2006-07-17): 1609163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1610163302Sru# ever since standard time was introduced, but the information from 1611163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1612163302Sru# switched to EST immediately after WWII era daylight saving time 1613163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1614163302Sru# entry since our cutoff date of 1970, so we can move 1615163302Sru# America/Coral_Harbour to the 'backward' file. 1616163302Sru 1617210718Sedwin# From Mark Brader (2010-03-06): 1618210718Sedwin# 1619210718Sedwin# Currently the database has: 1620210718Sedwin# 1621210718Sedwin# # Ontario 1622210718Sedwin# 1623210718Sedwin# # From Paul Eggert (2006-07-09): 1624210718Sedwin# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1625210718Sedwin# # Toronto. 1626210718Sedwin# # Thunder Bay skipped DST in 1973. 1627210718Sedwin# # Many smaller locales did not observe peacetime DST until 1974; 1628210718Sedwin# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1629210718Sedwin# 1630210718Sedwin# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1631210718Sedwin# right corner of page 1, it says that Toronto will return to standard 1632210718Sedwin# time at 2 am Sunday morning (which agrees with the database), and that: 1633210718Sedwin# 1634210718Sedwin# The one-hour setback will go into effect throughout most of Ontario, 1635210718Sedwin# except in areas like Windsor which remains on standard time all year. 1636210718Sedwin# 1637210718Sedwin# Windsor is, of course, a lot larger than Nipigon. 1638210718Sedwin# 1639210718Sedwin# I only came across this incidentally. I don't know if Windsor began 1640210718Sedwin# observing DST when Detroit did, or in 1974, or on some other date. 1641210718Sedwin# 1642210718Sedwin# By the way, the article continues by noting that: 1643210718Sedwin# 1644210718Sedwin# Some cities in the United States have pushed the deadline back 1645210718Sedwin# three weeks and will change over from daylight saving in October. 1646210718Sedwin 1647210718Sedwin# From Arthur David Olson (2010-07-17): 1648210718Sedwin# 1649210718Sedwin# "Standard Time and Time Zones in Canada" appeared in 1650210718Sedwin# The Journal of The Royal Astronomical Society of Canada, 1651210718Sedwin# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1652210718Sedwin# was available at 1653210718Sedwin# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1654210718Sedwin# 1655210718Sedwin# It includes the text below (starting on page 57): 1656210718Sedwin# 1657210718Sedwin# A list of the places in Canada using daylight saving time would 1658210718Sedwin# require yearly revision. From information kindly furnished by 1659210718Sedwin# the provincial governments and by the postmasters in many cities 1660210718Sedwin# and towns, it is found that the following places used daylight sav- 1661210718Sedwin# ing in 1930. The information for the province of Quebec is definite, 1662210718Sedwin# for the other provinces only approximate: 1663210718Sedwin# 1664273719Sedwin# Province Daylight saving time used 1665210718Sedwin# Prince Edward Island Not used. 1666210718Sedwin# Nova Scotia In Halifax only. 1667210718Sedwin# New Brunswick In St. John only. 1668210718Sedwin# Quebec In the following places: 1669273719Sedwin# Montreal Lachine 1670273719Sedwin# Quebec Mont-Royal 1671273719Sedwin# L��vis Iberville 1672273719Sedwin# St. Lambert Cap de la Madel��ine 1673273719Sedwin# Verdun Loretteville 1674273719Sedwin# Westmount Richmond 1675273719Sedwin# Outremont St. J��r��me 1676273719Sedwin# Longueuil Greenfield Park 1677273719Sedwin# Arvida Waterloo 1678273719Sedwin# Chambly-Canton Beaulieu 1679273719Sedwin# Melbourne La Tuque 1680273719Sedwin# St. Th��ophile Buckingham 1681210718Sedwin# Ontario Used generally in the cities and towns along 1682273719Sedwin# the southerly part of the province. Not 1683273719Sedwin# used in the northwesterly part. 1684210718Sedwin# Manitoba Not used. 1685210718Sedwin# Saskatchewan In Regina only. 1686210718Sedwin# Alberta Not used. 1687210718Sedwin# British Columbia Not used. 1688210718Sedwin# 1689210718Sedwin# With some exceptions, the use of daylight saving may be said to be limited 1690210718Sedwin# to those cities and towns lying between Quebec city and Windsor, Ont. 1691210718Sedwin 16922742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1693121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1694121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1695121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1696121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1697121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1698121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1699121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1700158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1701158421Swollman# was meant. 1702121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1703121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1704136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1705136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1706136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1707136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1708136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1709136638Swollman# The rules below avoid use of Sun>=25 1710136638Swollman# (which pre-2004 versions of zic cannot handle). 1711136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1712136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1713136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1714136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1715136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1716136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1717121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1718121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1719121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1720121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1721121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1722121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1723121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1724121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1725158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1726163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1727163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1728163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1729121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1730121098Swollman 1731121098Swollman# From Paul Eggert (2003-07-27): 1732121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1733121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1734121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1735136638Swollman# Saskatchewan, for one year." 1736121098Swollman 1737136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1738136638Swollman# Thunder Bay Museum (2003-11-12): 1739136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1740136638Swollman# savings time was being practiced in Fort William and Port Arthur 1741136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1742136638Swollman# Time Zones was permanently moved about two hundred miles west to 1743136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1744136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1745136638Swollman# already, did not change their clocks.... During the Second World 1746136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1747136638Swollman# months for the remainder of the war years. 1748136638Swollman 17492742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1750121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1751121098Swollman -5:00 Canada E%sT 1919 1752273719Sedwin -5:00 Toronto E%sT 1942 Feb 9 2:00s 1753121098Swollman -5:00 Canada E%sT 1946 1754121098Swollman -5:00 Toronto E%sT 1974 1755121098Swollman -5:00 Canada E%sT 175617200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1757136638Swollman -6:00 - CST 1910 1758136638Swollman -5:00 - EST 1942 175917200Swollman -5:00 Canada E%sT 1970 1760257697Sedwin -5:00 Toronto E%sT 1973 176117200Swollman -5:00 - EST 1974 176217200Swollman -5:00 Canada E%sT 176317200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1764121098Swollman -5:00 Canada E%sT 1940 Sep 29 1765273719Sedwin -5:00 1:00 EDT 1942 Feb 9 2:00s 176617200Swollman -5:00 Canada E%sT 1767163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1768121098Swollman -6:00 Canada C%sT 1940 Sep 29 1769273719Sedwin -6:00 1:00 CDT 1942 Feb 9 2:00s 177017200Swollman -6:00 Canada C%sT 1771163302SruZone America/Atikokan -6:06:28 - LMT 1895 1772163302Sru -6:00 Canada C%sT 1940 Sep 29 1773273719Sedwin -6:00 1:00 CDT 1942 Feb 9 2:00s 1774273719Sedwin -6:00 Canada C%sT 1945 Sep 30 2:00 1775163302Sru -5:00 - EST 17762742Swollman 17778029Swollman 177817200Swollman# Manitoba 177919878Swollman 1780158421Swollman# From Rob Douglas (2006-04-06): 1781158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1782158421Swollman# March 27, 1987 ... said ... 1783158421Swollman# "between two o'clock Central Standard Time in the morning of 1784158421Swollman# the first Sunday of April of each year and two o'clock Central 1785158421Swollman# Standard Time in the morning of the last Sunday of October next 1786158421Swollman# following, one hour in advance of Central Standard Time."... 1787270817Spluknet# I believe that the English legislation [of the old time act] had 1788158421Swollman# been assented to (March 22, 1967).... 1789158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1790158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1791158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1792158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1793158421Swollman 1794158421Swollman# From Paul Eggert (2006-04-10): 1795158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1796158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1797158421Swollman# it was also 02:00s in 1966. 1798158421Swollman 17992742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18002742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 18012742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 18022742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 1803233445SedwinRule Winn 1918 only - Oct 27 2:00 0 S 18042742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 180514343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1806121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1807121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 18082742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 18092742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 18102742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 18112742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 181214343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 181314343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 181414343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 181514343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 181614343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 18172742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 18182742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 18192742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 182014343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1821158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1822158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1823158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 18242742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18252742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1826158421Swollman -6:00 Winn C%sT 2006 1827158421Swollman -6:00 Canada C%sT 18282742Swollman 18298029Swollman 183017200Swollman# Saskatchewan 183117200Swollman 1832121098Swollman# From Mark Brader (2003-07-26): 1833121098Swollman# The first actual adoption of DST in Canada was at the municipal 1834121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1835121098Swollman# elsewhere have long been talking of legislation to save daylight, 1836121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1837121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1838121098Swollman# presumably late evening, as below), and would run until "the end of 1839121098Swollman# the summer". The discrepancy between municipal time and railroad 1840121098Swollman# time was noted. 1841121098Swollman 1842121098Swollman# From Paul Eggert (2003-07-27): 1843121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1844121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1845121098Swollman 1846158421Swollman# From Paul Eggert (2006-03-22): 1847158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 184817200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 184917200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 185067578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 185167578Swollman# are like Winnipeg, in violation of Saskatchewan law. 185217200Swollman 1853149514Swollman# From W. Jones (1992-11-06): 185417200Swollman# The. . .below is based on information I got from our law library, the 185517200Swollman# provincial archives, and the provincial Community Services department. 185617200Swollman# A precise history would require digging through newspaper archives, and 185717200Swollman# since you didn't say what you wanted, I didn't bother. 185817200Swollman# 185917200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 186017200Swollman# the boundary became pretty ragged as communities near it reevaluated 186117200Swollman# their affiliations in one direction or the other. In 1965 a provincial 186217200Swollman# referendum favoured legislating common time practices. 186317200Swollman# 186417200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 186517200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 186617200Swollman# part of Saskatchewan would use CST year round, that districts in 186717200Swollman# northwest Saskatchewan would by default follow CST but could opt to 186817200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 186917200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 187017200Swollman# by default follow MT but could opt to follow CST. 187117200Swollman# 187217200Swollman# It took a few years for the dust to settle (I know one story of a town 187317200Swollman# on one time zone having its school in another, such that a mom had to 187417200Swollman# serve her family lunch in two shifts), but presently it seems that only 187517200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 187617200Swollman# rules any more; all other districts appear to have used CST year round 187717200Swollman# since sometime in the 1960s. 187817200Swollman 1879163302Sru# From Chris Walton (2006-06-26): 1880163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1881163302Sru# long and rather painful to read. 1882163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1883163302Sru 18842742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18852742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 1886233445SedwinRule Regina 1918 only - Oct 27 2:00 0 S 18872742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 18882742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 18892742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 18902742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 18912742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 18922742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1893121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1894121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 18952742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 189617200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 189717200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1898121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1899121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1900121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 190117200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 190217200Swollman# 190317200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 190417200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 190517200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 190617200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 190717200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 19082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 190917200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 1910273719Sedwin -7:00 Regina M%sT 1960 Apr lastSun 2:00 19112742Swollman -6:00 - CST 191217200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 1913273719Sedwin -7:00 Canada M%sT 1946 Apr lastSun 2:00 191417200Swollman -7:00 Regina M%sT 1950 1915273719Sedwin -7:00 Swift M%sT 1972 Apr lastSun 2:00 191617200Swollman -6:00 - CST 19172742Swollman 19188029Swollman 191917200Swollman# Alberta 192017200Swollman 19212742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 19222742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1923233445SedwinRule Edm 1918 only - Oct 27 2:00 0 S 19242742SwollmanRule Edm 1919 only - May 27 2:00 0 S 19252742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 19262742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 19272742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1928121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1929121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 19302742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 19312742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 19322742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 19332742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 19342742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 19352742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 19362742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 19372742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1938158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 19392742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19402742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1941158421Swollman -7:00 Edm M%sT 1987 1942158421Swollman -7:00 Canada M%sT 19432742Swollman 19448029Swollman 194517200Swollman# British Columbia 194617200Swollman 1947158421Swollman# From Paul Eggert (2006-03-22): 1948158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1949158421Swollman# been like Vancouver. 195058787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 195167578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 195217200Swollman 1953233445Sedwin# It seems though that (re: Creston) is not entirely correct: 1954233445Sedwin 1955233445Sedwin# From Chris Walton (2011-12-01): 1956233445Sedwin# There are two areas within the Canadian province of British Columbia 1957233445Sedwin# that do not currently observe daylight saving: 1958233445Sedwin# a) The Creston Valley (includes the town of Creston and surrounding area) 1959233445Sedwin# b) The eastern half of the Peace River Regional District 1960233445Sedwin# (includes the cities of Dawson Creek and Fort St. John) 1961233445Sedwin 1962233445Sedwin# Earlier this year I stumbled across a detailed article about the time 1963233445Sedwin# keeping history of Creston; it was written by Tammy Hardwick who is the 1964233445Sedwin# manager of the Creston & District Museum. The article was written in May 2009. 1965233445Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1966233445Sedwin# According to the article, Creston has not changed its clocks since June 1918. 1967328476Sphilip# i.e. Creston has been stuck on UT-7 for 93 years. 1968233445Sedwin# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1969233445Sedwin 1970233445Sedwin# Unfortunately the exact date for the time change in June 1918 remains 1971233445Sedwin# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1972233445Sedwin# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1973273719Sedwin# as plausible as any other date (in June). She also said that after writing 1974273719Sedwin# the article she had discovered another time change in 1916; this is the 1975273719Sedwin# subject of another article which she wrote in October 2010. 1976233445Sedwin# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1977233445Sedwin 1978233445Sedwin# Here is a summary of the three clock change events in Creston's history: 1979233445Sedwin# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1980233445Sedwin# Exact date unknown 1981240457Sedwin# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1982273719Sedwin# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1983233445Sedwin# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1984233445Sedwin# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1985286751Sedwin# note 1: 1986233445Sedwin# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1987233445Sedwin# Creston did not change its clocks. 1988286751Sedwin# note 2: 1989233445Sedwin# During WWII when the Federal Government legislated a mandatory clock change, 1990233445Sedwin# Creston did not oblige. 1991286751Sedwin# note 3: 1992233445Sedwin# There is no guarantee that Creston will remain on Mountain Standard Time 1993233445Sedwin# (UTC-7) forever. 1994233445Sedwin# The subject was debated at least once this year by the town Council. 1995233445Sedwin# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1996233445Sedwin 1997233445Sedwin# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1998233445Sedwin# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1999233445Sedwin# summer time to cause the offset to be -7:00, the same as it had been before 2000233445Sedwin# the change. It can be argued that the timezone abbreviation during this 2001233445Sedwin# period should be PDT rather than MST, but that doesn't seem important enough 2002233445Sedwin# (to anyone) to further complicate the rules. 2003233445Sedwin 2004233445Sedwin# The transition dates (and times) are guesses. 2005233445Sedwin 2006290698Sedwin# From Matt Johnson (2015-09-21): 2007290698Sedwin# Fort Nelson, BC, Canada will cancel DST this year. So while previously they 2008290698Sedwin# were aligned with America/Vancouver, they're now aligned with 2009290698Sedwin# America/Dawson_Creek. 2010290698Sedwin# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html 2011290698Sedwin# 2012290698Sedwin# From Tim Parenti (2015-09-23): 2013290698Sedwin# This requires a new zone for the Northern Rockies Regional Municipality, 2014290698Sedwin# America/Fort_Nelson. The resolution of 2014-12-08 was reached following a 2015290698Sedwin# 2014-11-15 poll with nearly 75% support. Effectively, the municipality has 2016290698Sedwin# been on MST (-0700) like Dawson Creek since it advanced its clocks on 2017290698Sedwin# 2015-03-08. 2018290698Sedwin# 2019290698Sedwin# From Paul Eggert (2015-09-23): 2020290698Sedwin# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. 2021290698Sedwin 20222742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 20232742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 2024233445SedwinRule Vanc 1918 only - Oct 27 2:00 0 S 2025121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 2026121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 20272742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 20282742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 20292742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 20302742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 2031158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 20322742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 20332742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 2034158421Swollman -8:00 Vanc P%sT 1987 2035158421Swollman -8:00 Canada P%sT 203617200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 203717200Swollman -8:00 Canada P%sT 1947 2038273719Sedwin -8:00 Vanc P%sT 1972 Aug 30 2:00 203917200Swollman -7:00 - MST 2040290698SedwinZone America/Fort_Nelson -8:10:47 - LMT 1884 2041290698Sedwin -8:00 Vanc P%sT 1946 2042290698Sedwin -8:00 - PST 1947 2043290698Sedwin -8:00 Vanc P%sT 1987 2044290698Sedwin -8:00 Canada P%sT 2015 Mar 8 2:00 2045290698Sedwin -7:00 - MST 2046233445SedwinZone America/Creston -7:46:04 - LMT 1884 2047233445Sedwin -7:00 - MST 1916 Oct 1 2048233445Sedwin -8:00 - PST 1918 Jun 2 2049233445Sedwin -7:00 - MST 20502742Swollman 205158787Sru# Northwest Territories, Nunavut, Yukon 205217200Swollman 2053158421Swollman# From Paul Eggert (2006-03-22): 205417200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 2055149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 205620094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 2057283080Sedwin# c. 7 defines Yukon standard time as UTC-9.... 205820094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 2059325160Sphilip# [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html] 206020094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 206120094Swollman# * O.I.C. 1980/02 established DST. 206220094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 206317200Swollman 2064283080Sedwin# From Brian Inglis (2015-04-14): 2065283080Sedwin# 2066283080Sedwin# I tried to trace the history of Yukon time and found the following 2067283080Sedwin# regulations, giving the reference title and URL if found, regulation name, 2068283080Sedwin# and relevant quote if available. Each regulation specifically revokes its 2069283080Sedwin# predecessor. The final reference is to the current Interpretation Act 2070283080Sedwin# authorizing and resulting from these regulatory changes. 2071283080Sedwin# 2072283080Sedwin# Only recent regulations were retrievable via Yukon government site search or 2073283080Sedwin# index, and only some via Canadian legal sources. Other sources used include 2074283080Sedwin# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 2075283080Sedwin# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 2076283080Sedwin# 1970 quoted below; each article includes current extracts from provincial 2077283080Sedwin# and territorial ST and DST regulations at the end, summaries and details of 2078283080Sedwin# standard times and daylight saving time at many locations across Canada, 2079283080Sedwin# with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 2080283080Sedwin# and LMST; they also cover many countries and global locations, with a chart 2081283080Sedwin# and table showing current Universal Time offsets, and may be useful as 2082283080Sedwin# another source of information for 1970 and earlier. 2083283080Sedwin# 2084283080Sedwin# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 2085283080Sedwin# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 2086283080Sedwin# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 2087283080Sedwin# Yukon Interpretation Ordinance 2088283080Sedwin# Yukon standard time is the local mean time at the one hundred and 2089283080Sedwin# thirty-fifth meridian. 2090283080Sedwin# 2091283080Sedwin# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 2092283080Sedwin# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 2093283080Sedwin# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 2094283080Sedwin# Yukon Interpretation Ordinance, 1955, Chap. 16. 2095283080Sedwin# 2096283080Sedwin# (1) Subject to this section, standard time shall be reckoned as nine 2097283080Sedwin# hours behind Greenwich Time and called Yukon Standard Time. 2098283080Sedwin# 2099283080Sedwin# (2) Notwithstanding subsection (1), the Commissioner may make regulations 2100283080Sedwin# varying the manner of reckoning standard time. 2101283080Sedwin# 2102283080Sedwin# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 2103283080Sedwin# http://? - no online source found 2104283080Sedwin# 2105283080Sedwin# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 2106283080Sedwin# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 2107283080Sedwin# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 2108283080Sedwin# Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 2109283080Sedwin# 2110283080Sedwin# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 2111283080Sedwin# Territory on 27th January, 1966, is hereby revoked. 2112283080Sedwin# 2113283080Sedwin# 2. Yukon (East) Standard Time as defined by section 36 of the 2114283080Sedwin# Interpretation Ordinance from and after mid-night on the 28th day of May, 2115283080Sedwin# 1967 shall be reckoned in the same manner as Pacific Standard Time, that 2116283080Sedwin# is to say, eight hours behind Greenwich Time in the area of the Yukon 2117283080Sedwin# Territory lying east of the 138th degree longitude west. 2118283080Sedwin# 2119283080Sedwin# 3. In the remainder of the Territory, lying west of the 138th degree 2120283080Sedwin# longitude west, Yukon (West) Standard Time shall be reckoned as nine 2121283080Sedwin# hours behind Greenwich Time. 2122283080Sedwin# 2123283080Sedwin# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 2124325160Sphilip# https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 2125283080Sedwin# C.O. 1973/214 INTERPRETATION ACT ... 2126283080Sedwin# 2127283080Sedwin# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 2128283080Sedwin# revoked. 2129283080Sedwin# 2130283080Sedwin# 2. Yukon Standard Time as defined by section 36 of the Interpretation 2131283080Sedwin# Act from and after midnight on the twenty-eighth day of October, 1973 2132283080Sedwin# shall be reckoned in the same manner as Pacific Standard Time, that is 2133283080Sedwin# to say eight hours behind Greenwich Time. 2134283080Sedwin# 2135283080Sedwin# * O.I.C. 1980/02 INTERPRETATION ACT 2136283080Sedwin# http://? - no online source found 2137283080Sedwin# 2138283080Sedwin# * Yukon Daylight Saving Time, YOIC 1987/56 2139325160Sphilip# https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 2140283080Sedwin# O.I.C. 1987/056 INTERPRETATION ACT ... 2141283080Sedwin# 2142283080Sedwin# In every year between 2143283080Sedwin# (a) two o'clock in the morning in the first Sunday in April, and 2144283080Sedwin# (b) two o'clock in the morning in the last Sunday in October, 2145283080Sedwin# Standard Time shall be reckoned as seven hours behind Greenwich Time and 2146283080Sedwin# called Yukon Daylight Saving Time. 2147283080Sedwin# ... 2148283080Sedwin# Dated ... 9th day of March, A.D., 1987. 2149283080Sedwin# 2150283080Sedwin# * Yukon Daylight Saving Time 2006, YOIC 2006/127 2151325160Sphilip# https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 2152283080Sedwin# O.I.C. 2006/127 INTERPRETATION ACT ... 2153283080Sedwin# 2154283080Sedwin# 1. In Yukon each year the time for general purposes shall be 7 hours 2155283080Sedwin# behind Greenwich mean time during the period commencing at two o'clock 2156283080Sedwin# in the forenoon on the second Sunday of March and ending at two o'clock 2157283080Sedwin# in the forenoon on the first Sunday of November and shall be called 2158283080Sedwin# Yukon Daylight Saving Time. 2159283080Sedwin# 2160283080Sedwin# 2. Order-in-Council 1987/56 is revoked. 2161283080Sedwin# 2162283080Sedwin# 3. This order comes into force January 1, 2007. 2163283080Sedwin# 2164283080Sedwin# * Interpretation Act, RSY 2002, c 125 2165325160Sphilip# https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 2166283080Sedwin 216758787Sru# From Rives McDow (1999-09-04): 216858787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 216958787Sru# Nunavut moves to single time zone Oct. 31 2170273719Sedwin# http://www.nunatsiaq.com/nunavut/nvt90903_13.html 217158787Sru# 217258787Sru# From Antoine Leca (1999-09-06): 217358787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 217458787Sru# to differentiate it from the Yellowknife region. 217558787Sru 217658787Sru# From Paul Eggert (1999-09-20): 217758787Sru# Basic Facts: The New Territory 2178273719Sedwin# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2179270817Spluknet# (1999) reports that Pangnirtung operates on eastern time, 218058787Sru# and that Coral Harbour does not observe DST. We don't know when 218186222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 218258787Sru 218358787Sru# From Rives McDow (1999-11-08): 218458787Sru# On October 31, when the rest of Nunavut went to Central time, 218558787Sru# Pangnirtung wobbled. Here is the result of their wobble: 218658787Sru# 218758787Sru# The following businesses and organizations in Pangnirtung use Central Time: 218858787Sru# 218958787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 219058787Sru# Eastern Arctic National Parks, A & D Specialist 219158787Sru# 219258787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 219358787Sru# 219458787Sru# Hamlet office, All other businesses, Both schools, Airport operator 219558787Sru# 219658787Sru# This has made for an interesting situation there, which warranted the news. 219758787Sru# No one there that I spoke with seems concerned, or has plans to 219858787Sru# change the local methods of keeping time, as it evidently does not 219958787Sru# really interfere with any activities or make things difficult locally. 220058787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 220158787Sru# so it appears that the situation will last at least that long. 220258787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 220358787Sru# their senses", but the locals evidently don't see any problem with 220458787Sru# the current state of affairs. 220558787Sru 220658787Sru# From Michaela Rodrigue, writing in the 2207273719Sedwin# Nunatsiaq News (1999-11-19): 2208325160Sphilip# http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html 220958787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 221058787Sru# central - or Nunavut time - for government offices, and eastern time 221158787Sru# for municipal offices and schools.... Igloolik [was similar but then] 221258787Sru# made the switch to central time on Saturday, Nov. 6. 221358787Sru 221467578Swollman# From Paul Eggert (2000-10-02): 221567578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 221667578Swollman# for these potential new Zones. 221775267Swollman# 221867578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 221967578Swollman# handful of residents at the Eureka weather station [in the Central 222067578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 222167578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 222267578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 222367578Swollman# Central Time and Southampton Island [in the Central zone] is not 222467578Swollman# required to use daylight savings. 222567578Swollman 2226325160Sphilip# From <http://www.nunatsiaqonline.ca/archives/nunavut001130/nvt21110_02.html> 2227270817Spluknet# Nunavut now has two time zones (2000-11-10): 222875267Swollman# The Nunavut government would allow its employees in Kugluktuk and 222975267Swollman# Cambridge Bay to operate on central time year-round, putting them 223075267Swollman# one hour behind the rest of Nunavut for six months during the winter. 223175267Swollman# At the end of October the two communities had rebelled against 223275267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 223375267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 223475267Swollman# central time, while Kugluktuk, even farther west, reverted to 223575267Swollman# mountain time, which they had used before the advent of Nunavut's 223675267Swollman# unified time zone in 1999. 223775267Swollman# 223875267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 223975267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 224075267Swollman 224175267Swollman# From Paul Eggert (2000-12-04): 224275267Swollman# Let's just keep track of the official times for now. 224375267Swollman 224475267Swollman# From Rives McDow (2001-03-07): 224575267Swollman# The premier of Nunavut has issued a ministerial statement advising 224675267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 224775267Swollman# back to three time zones (mountain, central, and eastern). Of the 224875267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 224975267Swollman# has said it will not observe dst, staying on EST year round. I'm 225075267Swollman# checking for more info, and will get back to you if I come up with 225175267Swollman# more. 225275267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 225375267Swollman 2254149514Swollman# From Gwillim Law (2005-05-21): 2255273719Sedwin# According to ... 2256149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2257149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 2258149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2259149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 2260149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 2261149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 2262149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2263149514Swollman# 2264273719Sedwin# From Paul Eggert (2014-10-17): 2265149514Swollman# For lack of better information, assume that Southampton Island observed 2266273719Sedwin# daylight saving only during wartime. Gwillim Law's email also 2267273719Sedwin# mentioned maps now maintained by National Research Council Canada; 2268273719Sedwin# see above for an up-to-date link. 2269149514Swollman 2270169811Swollman# From Chris Walton (2007-03-01): 2271169811Swollman# ... the community of Resolute (located on Cornwallis Island in 2272169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 2273169811Swollman# Basically the community did not change its clocks at the end of 2274169811Swollman# daylight saving.... 2275169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2276163302Sru 2277226289Sedwin# From Chris Walton (2011-03-21): 2278226289Sedwin# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2279226289Sedwin# Bay. Resolute Bay is a small community located about 900km north of 2280226289Sedwin# the Arctic Circle. The zone file was required because Resolute Bay had 2281226289Sedwin# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2282169811Swollman# 2283226289Sedwin# According to new information which I received last week, Resolute Bay 2284226289Sedwin# went back to using UTC-6 in the winter of 2007-2008... 2285226289Sedwin# 2286226289Sedwin# On March 11/2007 most of Canada went onto daylight saving. On March 2287226289Sedwin# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2288226289Sedwin# talked to somebody that was both knowledgeable and helpful. I was able 2289226289Sedwin# to confirm that Resolute Bay was still operating on UTC-5. It was 2290226289Sedwin# explained to me that Resolute Bay had been on the Eastern Time zone 2291226289Sedwin# (EST) in the winter, and was now back on the Central Time zone (CDT). 2292226289Sedwin# i.e. the time zone had changed twice in the last year but the clocks 2293226289Sedwin# had not moved. The residents had to know which time zone they were in 2294226289Sedwin# so they could follow the correct TV schedule... 2295226289Sedwin# 2296226289Sedwin# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2297226289Sedwin# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2298226289Sedwin# of the phone call, I decided to seek out an alternate source of 2299226289Sedwin# information. I found an e-mail address for somebody by the name of 2300226289Sedwin# Stephanie Adams whose job was listed as "Inns North Support Officer for 2301226289Sedwin# Arctic Co-operatives." I was under the impression that Stephanie lived 2302226289Sedwin# and worked in Resolute Bay... 2303226289Sedwin# 2304226289Sedwin# On March 14/2011 I phoned the hamlet office again. I was told that 2305226289Sedwin# Resolute Bay had been using Central Standard Time over the winter of 2306226289Sedwin# 2010-2011 and that the clocks had therefore been moved one hour ahead 2307226289Sedwin# on March 13/2011. The person I talked to was aware that Resolute Bay 2308226289Sedwin# had previously experimented with Eastern Standard Time but he could not 2309226289Sedwin# tell me when the practice had stopped. 2310226289Sedwin# 2311226289Sedwin# On March 17/2011 I searched the Web to find an e-mail address of 2312226289Sedwin# somebody that might be able to tell me exactly when Resolute Bay went 2313226289Sedwin# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2314226289Sedwin# used to be the mayor of Resolute Bay and he apparently owns half the 2315226289Sedwin# businesses including "South Camp Inn." This website has some info on 2316226289Sedwin# Aziz: 2317226289Sedwin# http://www.uphere.ca/node/493 2318226289Sedwin# 2319226289Sedwin# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2320226289Sedwin# Eastern Standard Time. 2321226289Sedwin# 2322226289Sedwin# Aziz responded quickly with this: "hi, The time was not changed for the 2323226289Sedwin# 1 year only, the following year, the community went back to the old way 2324226289Sedwin# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2325226289Sedwin# the winter Zulu plus 6 hrs" 2326226289Sedwin# 2327226289Sedwin# This of course conflicted with everything I had ascertained in November 2008. 2328226289Sedwin# 2329226289Sedwin# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2330226289Sedwin# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2331226289Sedwin# may want to check with the weather office in Resolute Bay or do a 2332226289Sedwin# search on the weather through Env. Canada. web site" 2333226289Sedwin# 2334226289Sedwin# If I had realized the Stephanie did not live in Resolute Bay I would 2335226289Sedwin# never have contacted her. I now believe that all the information I 2336226289Sedwin# obtained in November 2008 should be ignored... 2337226289Sedwin# I apologize for reporting incorrect information in 2008. 2338169811Swollman 23392742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 234017200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 234117200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 234217200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 234317200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 2344121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2345121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 234617200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 234717200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 234817200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 234917200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2350158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2351158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 23522742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2353169811Swollman# aka Panniqtuuq 2354307362SbaptZone America/Pangnirtung 0 - -00 1921 # trading post est. 2355273719Sedwin -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2356273719Sedwin -5:00 Canada E%sT 1999 Oct 31 2:00 2357273719Sedwin -6:00 Canada C%sT 2000 Oct 29 2:00 235875267Swollman -5:00 Canada E%sT 2359169811Swollman# formerly Frobisher Bay 2360307362SbaptZone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. 2361273719Sedwin -5:00 NT_YK E%sT 1999 Oct 31 2:00 2362273719Sedwin -6:00 Canada C%sT 2000 Oct 29 2:00 236375267Swollman -5:00 Canada E%sT 2364169811Swollman# aka Qausuittuq 2365307362SbaptZone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded 2366273719Sedwin -6:00 NT_YK C%sT 2000 Oct 29 2:00 2367273719Sedwin -5:00 - EST 2001 Apr 1 3:00 2368273719Sedwin -6:00 Canada C%sT 2006 Oct 29 2:00 2369273719Sedwin -5:00 - EST 2007 Mar 11 3:00 2370226289Sedwin -6:00 Canada C%sT 2371169811Swollman# aka Kangiqiniq 2372307362SbaptZone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded 2373273719Sedwin -6:00 NT_YK C%sT 2000 Oct 29 2:00 2374273719Sedwin -5:00 - EST 2001 Apr 1 3:00 237558787Sru -6:00 Canada C%sT 2376169811Swollman# aka Iqaluktuuttiaq 2377307362SbaptZone America/Cambridge_Bay 0 - -00 1920 # trading post est.? 2378273719Sedwin -7:00 NT_YK M%sT 1999 Oct 31 2:00 2379273719Sedwin -6:00 Canada C%sT 2000 Oct 29 2:00 2380273719Sedwin -5:00 - EST 2000 Nov 5 0:00 2381273719Sedwin -6:00 - CST 2001 Apr 1 3:00 238275267Swollman -7:00 Canada M%sT 2383307362SbaptZone America/Yellowknife 0 - -00 1935 # Yellowknife founded? 2384158421Swollman -7:00 NT_YK M%sT 1980 2385158421Swollman -7:00 Canada M%sT 2386307362SbaptZone America/Inuvik 0 - -00 1953 # Inuvik founded 2387273719Sedwin -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2388158421Swollman -7:00 NT_YK M%sT 1980 2389158421Swollman -7:00 Canada M%sT 23902742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2391283080Sedwin -9:00 NT_YK Y%sT 1967 May 28 0:00 2392158421Swollman -8:00 NT_YK P%sT 1980 2393158421Swollman -8:00 Canada P%sT 239417200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 2395273719Sedwin -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2396158421Swollman -8:00 NT_YK P%sT 1980 2397158421Swollman -8:00 Canada P%sT 23982742Swollman 23998029Swollman 24002742Swollman############################################################################### 24012742Swollman 24022742Swollman# Mexico 24032742Swollman 2404279707Sedwin# From Paul Eggert (2014-12-07): 240575267Swollman# The Investigation and Analysis Service of the 240675267Swollman# Mexican Library of Congress (MLoC) has published a 240775267Swollman# history of Mexican local time (in Spanish) 2408279707Sedwin# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 24092742Swollman# 2410158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 241175267Swollman# (In all cases we go with the MLoC.) 2412158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 2413158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 2414158421Swollman# S&P report no DST during summer 1931. 2415158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 24162742Swollman 241775267Swollman# From Gwillim Law (2001-02-20): 241875267Swollman# There are some other discrepancies between the Decrees page and the 241975267Swollman# tz database. I think they can best be explained by supposing that 242075267Swollman# the researchers who prepared the Decrees page failed to find some of 242175267Swollman# the relevant documents. 242275267Swollman 2423149514Swollman# From Alan Perry (1996-02-15): 242417200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 242517200Swollman# outlining the timezone changes in Mexico. 242658787Sru# 242717200Swollman# ------------- Begin Forwarded Message ------------- 242858787Sru# 242917200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 243017200Swollman# rules for the DST changes. The rules are: 243158787Sru# 243217200Swollman# 1. The country is divided in 3 timezones: 243317200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 243417200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 243517200Swollman# - The rest of the country (the Mexico/General TZ) 243658787Sru# 243717200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 243817200Swollman# at 2:00 AM, the times in each zone are as follows: 243917200Swollman# BajaNorte: GMT+7 244017200Swollman# BajaSur: GMT+6 244117200Swollman# General: GMT+5 244258787Sru# 244317200Swollman# 3. The rest of the year, the times are as follows: 244417200Swollman# BajaNorte: GMT+8 244517200Swollman# BajaSur: GMT+7 244617200Swollman# General: GMT+6 244758787Sru# 244817200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 244958787Sru# 245017200Swollman# -------------- End Forwarded Message -------------- 245117200Swollman# From Paul Eggert (1996-06-12): 245243014Swollman# For an English translation of the decree, see 2453273719Sedwin# "Diario Oficial: Time Zone Changeover" (1996-01-04). 2454273719Sedwin# http://mexico-travel.com/extra/timezone_eng.html 245514343Swollman 245643543Swollman# From Rives McDow (1998-10-08): 245743543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 245843543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 245943543Swollman 246058787Sru# From Rives McDow (2000-01-10): 246158787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 246258787Sru# zone 5 hours from the International Date Line, and will not observe daylight 246358787Sru# savings time so as to stay on the same time zone as the southern part of 246458787Sru# Arizona year round. 246558787Sru 2466270817Spluknet# From Jesper N��rgaard, translating 246775267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 246875267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 246975267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 247075267Swollman# year, so that the more than 10,000 schools work at normal hour the 247175267Swollman# whole year. 247275267Swollman 247375267Swollman# From Gwillim Law (2001-01-19): 247475267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 247575267Swollman# (translated):... 247675267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 247775267Swollman# that Summer Time will be reduced from seven to five months, starting 247875267Swollman# this year.... 2479273719Sedwin# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 248075267Swollman# [translated], says "summer time will ... take effect on the first Sunday 248175267Swollman# in May, and end on the last Sunday of September. 248275267Swollman 248375267Swollman# From Arthur David Olson (2001-01-25): 248475267Swollman# The 2001-01-24 traditional Washington Post contained the page one 248575267Swollman# story "Timely Issue Divides Mexicans."... 248675267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2487270817Spluknet# ... Mexico City Mayor L��pez Obrador "...is threatening to keep 248875267Swollman# Mexico City and its 20 million residents on a different time than 2489270817Spluknet# the rest of the country..." In particular, L��pez Obrador would abolish 249075267Swollman# observation of Daylight Saving Time. 249175267Swollman 249275267Swollman# Official statute published by the Energy Department 2493273719Sedwin# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2494270817Spluknet# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2495270817Spluknet# and Sonora with no DST. This was reported by Jesper N��rgaard (2001-02-03). 249675267Swollman 249775267Swollman# From Paul Eggert (2001-03-03): 249875267Swollman# 2499273719Sedwin# http://www.latimes.com/news/nation/20010303/t000018766.html 250075267Swollman# James F. Smith writes in today's LA Times 250175267Swollman# * Sonora will continue to observe standard time. 2502270817Spluknet# * Last week Mexico City's mayor Andr��s Manuel L��pez Obrador decreed that 250375267Swollman# the Federal District will not adopt DST. 250475267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 250575267Swollman# * The decree does not affect federal-controlled facilities including 250675267Swollman# the airport, banks, hospitals, and schools. 250775267Swollman# 250875267Swollman# For now we'll assume that the Federal District will bow to federal rules. 250975267Swollman 2510270817Spluknet# From Jesper N��rgaard (2001-04-01): 251175267Swollman# I found some references to the Mexican application of daylight 251275267Swollman# saving, which modifies what I had already sent you, stating earlier 251375267Swollman# that a number of northern Mexican states would go on daylight 251475267Swollman# saving. The modification reverts this to only cover Baja California 251575267Swollman# (Norte), while all other states (except Sonora, who has no daylight 251675267Swollman# saving all year) will follow the original decree of president 251775267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 251875267Swollman# September 30, 2001. 2519270817Spluknet# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 252075267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 252175267Swollman 252286222Swollman# From Reuters (2001-09-04): 252386222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 252486222Swollman# unconstitutional in Mexico City, creating the possibility the 252586222Swollman# capital will be in a different time zone from the rest of the nation 252686222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 252786222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 252886222Swollman# standard time. "This is so residents of the Federal District are not 252986222Swollman# subject to unexpected time changes," a statement from the court said. 253086222Swollman 2531270817Spluknet# From Jesper N��rgaard Welen (2002-03-12): 253293799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 253393799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 253493799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 253593799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 253693799Swollman 2537203019Sedwin# From Steffen Thorsen (2009-12-28): 2538203019Sedwin# 2539203019Sedwin# Steffen Thorsen wrote: 2540203019Sedwin# > Mexico's House of Representatives has approved a proposal for northern 2541203019Sedwin# > Mexico's border cities to share the same daylight saving schedule as 2542203019Sedwin# > the United States. 2543203019Sedwin# Now this has passed both the Congress and the Senate, so starting from 2544203019Sedwin# 2010, some border regions will be the same: 2545203019Sedwin# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2546203019Sedwin# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2547203019Sedwin# (Spanish) 2548203019Sedwin# 2549203019Sedwin# Could not find the new law text, but the proposed law text changes are here: 2550203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2551203019Sedwin# (Gaceta Parlamentaria) 2552203019Sedwin# 2553203019Sedwin# There is also a list of the votes here: 2554203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2555203019Sedwin# 2556203019Sedwin# Our page: 2557325160Sphilip# https://www.timeanddate.com/news/time/north-mexico-dst-change.html 2558203019Sedwin 2559203019Sedwin# From Arthur David Olson (2010-01-20): 2560203019Sedwin# The page 2561203019Sedwin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2562203019Sedwin# includes this text: 2563203019Sedwin# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2564270817Spluknet# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila; 2565270817Spluknet# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en 2566270817Spluknet# Tamaulipas, la aplicaci��n de este horario estacional surtir�� efecto 2567270817Spluknet# desde las dos horas del segundo domingo de marzo y concluir�� a las dos 2568203019Sedwin# horas del primer domingo de noviembre. 2569203019Sedwin# En los municipios fronterizos que se encuentren ubicados en la franja 2570270817Spluknet# fronteriza norte en el territorio comprendido entre la l��nea 2571270817Spluknet# internacional y la l��nea paralela ubicada a una distancia de veinte 2572270817Spluknet# kil��metros, as�� como la Ciudad de Ensenada, Baja California, hacia el 2573270817Spluknet# interior del pa��s, la aplicaci��n de este horario estacional surtir�� 2574270817Spluknet# efecto desde las dos horas del segundo domingo de marzo y concluir�� a 2575203019Sedwin# las dos horas del primer domingo de noviembre. 2576203019Sedwin 2577279707Sedwin# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2578279707Sedwin# The Mexican state of Quintana Roo will likely change to EST in 2015. 2579279707Sedwin# 2580279707Sedwin# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2581279707Sedwin# "With this change, the time conflict that has existed between the municipios 2582279707Sedwin# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2583279707Sedwin# end. The latter declared itself in rebellion 15 years ago when a time change 2584279707Sedwin# was initiated in Mexico, and since then it has refused to change its time 2585279707Sedwin# zone along with the rest of the country." 2586279707Sedwin# 2587279707Sedwin# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2588279707Sedwin# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2589279707Sedwin# "...the new time zone will come into effect at two o'clock on the first Sunday 2590279707Sedwin# of February, when we will have to advance the clock one hour from its current 2591279707Sedwin# time..." 2592280414Sedwin# Also, the new zone will not use DST. 2593279707Sedwin# 2594280414Sedwin# From Carlos Ra��l Perasso (2015-02-02): 2595280414Sedwin# The decree that modifies the Mexican Hour System Law has finally 2596280414Sedwin# been published at the Diario Oficial de la Federaci��n 2597280414Sedwin# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2598280414Sedwin# It establishes 5 zones for Mexico: 2599280414Sedwin# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2600280414Sedwin# includes most of Mexico, excluding what's mentioned below. 2601280414Sedwin# 2- Zona Pac��fico (Pacific Zone): Longitude 105 W, includes the 2602280414Sedwin# states of Baja California Sur; Chihuahua; Nayarit (excluding Bah��a 2603280414Sedwin# de Banderas which lies in Central Zone); Sinaloa and Sonora. 2604280414Sedwin# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2605280414Sedwin# state of Baja California. 2606280414Sedwin# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2607280414Sedwin# of Quintana Roo. 2608280414Sedwin# 5- The islands, reefs and keys shall take their timezone from the 2609280414Sedwin# longitude they are located at. 2610279707Sedwin 26112742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 26122742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 26132742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 26142742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 26152742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 2616121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 26172742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 26182742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 26192742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 262075267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 262175267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 262293799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 262393799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 262493799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 262593799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 26262742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2627270817Spluknet# Quintana Roo; represented by Canc��n 262858787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 262975267Swollman -6:00 - CST 1981 Dec 23 263043543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 2631279707Sedwin -6:00 Mexico C%sT 2015 Feb 1 2:00 2632279707Sedwin -5:00 - EST 2633270817Spluknet# Campeche, Yucat��n; represented by M��rida 263464499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 263575267Swollman -6:00 - CST 1981 Dec 23 263664499Swollman -5:00 - EST 1982 Dec 2 263764499Swollman -6:00 Mexico C%sT 2638307362Sbapt# Coahuila, Nuevo Le��n, Tamaulipas (near US border) 2639307362Sbapt# This includes the following municipalities: 2640307362Sbapt# in Coahuila: Ocampo, Acu��a, Zaragoza, Jim��nez, Piedras Negras, Nava, 2641307362Sbapt# Guerrero, Hidalgo. 2642307362Sbapt# in Nuevo Le��n: An��huac, Los Aldama. 2643307362Sbapt# in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alem��n, Camargo, 2644307362Sbapt# Gustavo D��az Ordaz, Reynosa, R��o Bravo, Valle Hermoso, Matamoros. 2645307362Sbapt# See: Inicia ma��ana Horario de Verano en zona fronteriza, El Universal, 2646307362Sbapt# 2016-03-12 2647307362Sbapt# http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza 2648203019SedwinZone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2649203019Sedwin -6:00 - CST 1988 2650203019Sedwin -6:00 US C%sT 1989 2651203019Sedwin -6:00 Mexico C%sT 2010 2652203019Sedwin -6:00 US C%sT 2653307362Sbapt# Durango; Coahuila, Nuevo Le��n, Tamaulipas (away from US border) 265475267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 265564499Swollman -6:00 - CST 1988 265664499Swollman -6:00 US C%sT 1989 265764499Swollman -6:00 Mexico C%sT 265843014Swollman# Central Mexico 2659273719SedwinZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 26602742Swollman -7:00 - MST 1927 Jun 10 23:00 26612742Swollman -6:00 - CST 1930 Nov 15 26622742Swollman -7:00 - MST 1931 May 1 23:00 26632742Swollman -6:00 - CST 1931 Oct 266475267Swollman -7:00 - MST 1932 Apr 1 2665273719Sedwin -6:00 Mexico C%sT 2001 Sep 30 2:00 266693799Swollman -6:00 - CST 2002 Feb 20 266793799Swollman -6:00 Mexico C%sT 2668203019Sedwin# Chihuahua (near US border) 2669307362Sbapt# This includes the municipalities of Janos, Ascensi��n, Ju��rez, Guadalupe, 2670307362Sbapt# Pr��xedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. 2671307362Sbapt# (See the 2016-03-12 El Universal source mentioned above.) 2672273719SedwinZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2673203019Sedwin -7:00 - MST 1927 Jun 10 23:00 2674203019Sedwin -6:00 - CST 1930 Nov 15 2675203019Sedwin -7:00 - MST 1931 May 1 23:00 2676203019Sedwin -6:00 - CST 1931 Oct 2677203019Sedwin -7:00 - MST 1932 Apr 1 2678203019Sedwin -6:00 - CST 1996 2679203019Sedwin -6:00 Mexico C%sT 1998 2680273719Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 2681203019Sedwin -7:00 Mexico M%sT 2010 2682203019Sedwin -7:00 US M%sT 2683203019Sedwin# Chihuahua (away from US border) 268458787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 268543014Swollman -7:00 - MST 1927 Jun 10 23:00 268643014Swollman -6:00 - CST 1930 Nov 15 268743014Swollman -7:00 - MST 1931 May 1 23:00 268843014Swollman -6:00 - CST 1931 Oct 268975267Swollman -7:00 - MST 1932 Apr 1 269043014Swollman -6:00 - CST 1996 269143014Swollman -6:00 Mexico C%sT 1998 2692273719Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 269343014Swollman -7:00 Mexico M%sT 269458787Sru# Sonora 269558787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 269658787Sru -7:00 - MST 1927 Jun 10 23:00 269758787Sru -6:00 - CST 1930 Nov 15 269858787Sru -7:00 - MST 1931 May 1 23:00 269958787Sru -6:00 - CST 1931 Oct 270075267Swollman -7:00 - MST 1932 Apr 1 270164499Swollman -6:00 - CST 1942 Apr 24 270258787Sru -7:00 - MST 1949 Jan 14 270358787Sru -8:00 - PST 1970 270458787Sru -7:00 Mexico M%sT 1999 270558787Sru -7:00 - MST 2706207898Sedwin 2707207898Sedwin# From Alexander Krivenyshev (2010-04-21): 2708270817Spluknet# According to news, Bah��a de Banderas (Mexican state of Nayarit) 2709207898Sedwin# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2710207898Sedwin# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2711207898Sedwin# 2712207898Sedwin# (Spanish) 2713270817Spluknet# Bah��a de Banderas homologa su horario al del centro del 2714270817Spluknet# pa��s, a partir de este domingo 2715207898Sedwin# http://www.nayarit.gob.mx/notes.asp?id=20748 2716207898Sedwin# 2717270817Spluknet# Bah��a de Banderas homologa su horario con el del Centro del 2718270817Spluknet# Pa��s 2719270817Spluknet# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 2720207898Sedwin# 2721207898Sedwin# (English) 2722270817Spluknet# Puerto Vallarta and Bah��a de Banderas: One Time Zone 2723207898Sedwin# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2724207898Sedwin# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2725207898Sedwin# 2726207898Sedwin# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2727270817Spluknet# will allow Bah��a de Banderas and Puerto Vallarta to share the same time 2728207898Sedwin# zone ..." 272964499Swollman# Baja California Sur, Nayarit, Sinaloa 2730207898Sedwin 2731207898Sedwin# From Arthur David Olson (2010-05-01): 2732207898Sedwin# Use "Bahia_Banderas" to keep the name to fourteen characters. 2733207898Sedwin 2734270817Spluknet# Mazatl��n 27352742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 27362742Swollman -7:00 - MST 1927 Jun 10 23:00 27372742Swollman -6:00 - CST 1930 Nov 15 27382742Swollman -7:00 - MST 1931 May 1 23:00 27392742Swollman -6:00 - CST 1931 Oct 274075267Swollman -7:00 - MST 1932 Apr 1 274164499Swollman -6:00 - CST 1942 Apr 24 27422742Swollman -7:00 - MST 1949 Jan 14 27432742Swollman -8:00 - PST 1970 274414343Swollman -7:00 Mexico M%sT 2745207898Sedwin 2746270817Spluknet# Bah��a de Banderas 2747207898SedwinZone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2748207898Sedwin -7:00 - MST 1927 Jun 10 23:00 2749207898Sedwin -6:00 - CST 1930 Nov 15 2750207898Sedwin -7:00 - MST 1931 May 1 23:00 2751207898Sedwin -6:00 - CST 1931 Oct 2752207898Sedwin -7:00 - MST 1932 Apr 1 2753207898Sedwin -6:00 - CST 1942 Apr 24 2754207898Sedwin -7:00 - MST 1949 Jan 14 2755207898Sedwin -8:00 - PST 1970 2756273719Sedwin -7:00 Mexico M%sT 2010 Apr 4 2:00 2757207898Sedwin -6:00 Mexico C%sT 2758207898Sedwin 2759307362Sbapt# Baja California 27602742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 276175267Swollman -7:00 - MST 1924 27622742Swollman -8:00 - PST 1927 Jun 10 23:00 276375267Swollman -7:00 - MST 1930 Nov 15 276475267Swollman -8:00 - PST 1931 Apr 1 276575267Swollman -8:00 1:00 PDT 1931 Sep 30 276664499Swollman -8:00 - PST 1942 Apr 24 2767158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2768158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 276975267Swollman -8:00 - PST 1948 Apr 5 277075267Swollman -8:00 1:00 PDT 1949 Jan 14 277175267Swollman -8:00 - PST 1954 277275267Swollman -8:00 CA P%sT 1961 277375267Swollman -8:00 - PST 1976 277414343Swollman -8:00 US P%sT 1996 277575267Swollman -8:00 Mexico P%sT 2001 277693799Swollman -8:00 US P%sT 2002 Feb 20 2777203019Sedwin -8:00 Mexico P%sT 2010 2778203019Sedwin -8:00 US P%sT 2779158421Swollman# From Paul Eggert (2006-03-22): 278075267Swollman# Formerly there was an America/Ensenada zone, which differed from 278175267Swollman# America/Tijuana only in that it did not observe DST from 1976 2782158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2783158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2784270817Spluknet# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2785158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 278675267Swollman# DST-observance was a town-by-town matter back then. This concerns 278775267Swollman# data after 1970 so most likely there should be at least one Zone 278875267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 278975267Swollman# name or contents should be. 27902742Swollman# 2791307362Sbapt# From Paul Eggert (2015-10-08): 2792307362Sbapt# Formerly there was an America/Santa_Isabel zone, but this appears to 2793307362Sbapt# have come from a misreading of 2794307362Sbapt# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2795307362Sbapt# It has been moved to the 'backward' file. 2796307362Sbapt# 2797307362Sbapt# 27982742Swollman# Revillagigedo Is 27992742Swollman# no information 28002742Swollman 28012742Swollman############################################################################### 28022742Swollman 28032742Swollman# Anguilla 2804280414Sedwin# Antigua and Barbuda 2805270817Spluknet# See America/Port_of_Spain. 28062742Swollman 28072742Swollman# Bahamas 2808169811Swollman# 2809248307Sedwin# For 1899 Milne gives -5:09:29.5; round that. 2810248307Sedwin# 2811169811Swollman# From Sue Williams (2006-12-07): 2812169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2813169811Swollman# rules to sync with the U.S. starting in 2007.... 2814169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2815169811Swollman 28162742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2817181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2818181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 28192742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2820248307SedwinZone America/Nassau -5:09:30 - LMT 1912 Mar 2 2821169811Swollman -5:00 Bahamas E%sT 1976 2822169811Swollman -5:00 US E%sT 28232742Swollman 28242742Swollman# Barbados 2825248307Sedwin 2826248307Sedwin# For 1899 Milne gives -3:58:29.2; round that. 2827248307Sedwin 28282742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28292742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 28302742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 28312742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 28322742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 28332742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 28342742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2835273719SedwinZone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2836273719Sedwin -3:58:29 - BMT 1932 # Bridgetown Mean Time 28372742Swollman -4:00 Barb A%sT 28382742Swollman 28392742Swollman# Belize 2840158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 28412742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2842316350SbaptRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530 2843316350SbaptRule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST 2844316350SbaptRule Belize 1973 only - Dec 5 0:00 1:00 CDT 2845316350SbaptRule Belize 1974 only - Feb 9 0:00 0 CST 2846316350SbaptRule Belize 1982 only - Dec 18 0:00 1:00 CDT 2847316350SbaptRule Belize 1983 only - Feb 12 0:00 0 CST 28482742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28492742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 2850316350Sbapt -6:00 Belize %s 28512742Swollman 28522742Swollman# Bermuda 2853163302Sru 2854248307Sedwin# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2855248307Sedwin# Bermuda dockyard, Ireland I; round that. 2856248307Sedwin 2857163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2858163302Sru 2859163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2860163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2861163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2862163302Sru# Friday, the same thing will happen in Bermuda. 2863163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2864163302Sru 28652742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2866273719SedwinZone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2867273719Sedwin -4:00 - AST 1974 Apr 28 2:00 2868257697Sedwin -4:00 Canada A%sT 1976 2869163302Sru -4:00 US A%sT 28702742Swollman 28712742Swollman# Cayman Is 2872307362Sbapt# See America/Panama. 28732742Swollman 28742742Swollman# Costa Rica 2875248307Sedwin 2876270817Spluknet# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest. 2877248307Sedwin 28782742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28792742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 28802742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 288120094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2882158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2883158421Swollman# go with Shanks & Pottenger. 288420094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 288520094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 2886270817Spluknet# There are too many San Jos��s elsewhere, so we'll use 'Costa Rica'. 28872742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2888273719SedwinZone America/Costa_Rica -5:36:13 - LMT 1890 # San Jos�� 2889270817Spluknet -5:36:13 - SJMT 1921 Jan 15 # San Jos�� Mean Time 28902742Swollman -6:00 CR C%sT 28912742Swollman# Coco 28922742Swollman# no information; probably like America/Costa_Rica 28932742Swollman 28942742Swollman# Cuba 28952742Swollman 2896248307Sedwin# From Paul Eggert (2013-02-21): 2897248307Sedwin# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2898248307Sedwin# for the port, and -5:30 for meteorological observations. 2899248307Sedwin# For now, stick with Shanks & Pottenger. 2900248307Sedwin 290158787Sru# From Arthur David Olson (1999-03-29): 290258787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 290358787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 290458787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 290558787Sru# During the game, play-by-play announcer Jim Hunter noted that 290658787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 290758787Sru# Time today." (The "two hour" remark referred to losing one hour of 2908270817Spluknet# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2909270817Spluknet# to DST - and one more hour on 1999-04-04 - when the announcers will have 291058787Sru# returned to Baltimore, which switches on that date.) 29112742Swollman 2912259636Sedwin# From Steffen Thorsen (2013-11-11): 2913259636Sedwin# DST start in Cuba in 2004 ... does not follow the same rules as the 2914259636Sedwin# years before. The correct date should be Sunday 2004-03-28 00:00 ... 2915259636Sedwin# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2916259636Sedwin 2917138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2918138323Swollman# Cuba is not going back to standard time this year. 2919158421Swollman# From Paul Eggert (2006-03-22): 2920138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2921138323Swollman# says that it's due to a problem at the Antonio Guiteras 2922138323Swollman# thermoelectric plant, and says "This October there will be no return 2923138323Swollman# to normal hours (after daylight saving time)". 2924158421Swollman# For now, let's assume that it's a temporary measure. 2925138323Swollman 2926153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2927153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2928153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2929153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2930153670Swollman 2931270817Spluknet# From Jesper N��rgaard Welen (2006-10-21): 2932169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2933169811Swollman# the 3 years of permanent DST next weekend, see 2934169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2935169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2936270817Spluknet# watches should be set back one hour - going back to 00:00 hours - returning 2937169811Swollman# to the normal schedule.... 2938163302Sru 2939169811Swollman# From Paul Eggert (2007-03-02): 2940270817Spluknet# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2941169811Swollman# says Cuban clocks will advance at midnight on March 10. 2942169811Swollman# For lack of better information, assume Cuba will use US rules, 2943169811Swollman# except that it switches at midnight standard time as usual. 2944173319Sedwin# 2945173319Sedwin# From Steffen Thorsen (2007-10-25): 2946240457Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2947173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2948240457Sedwin# 2949173319Sedwin# He supplied these references: 2950240457Sedwin# 2951173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2952173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2953240457Sedwin# 2954270817Spluknet# From Alex Krivenyshev (2007-10-25): 2955173319Sedwin# Here is also article from Granma (Cuba): 2956240457Sedwin# 2957270817Spluknet# Regir�� el Horario Normal desde el pr��ximo domingo 28 de octubre 2958173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2959240457Sedwin# 2960173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2961169811Swollman 2962177591Sedwin# From Arthur David Olson (2008-03-09): 2963177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2964177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2965177591Sedwin# http://media.enet.cu/radioreloj 2966270817Spluknet# a Cuban information station, and heard 2967177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2968177591Sedwin# indicating that Cuba is still on standard time. 2969177591Sedwin 2970177591Sedwin# From Steffen Thorsen (2008-03-12): 2971177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2972177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2973177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2974177591Sedwin# 2975177591Sedwin# Some more background information is posted here: 2976325160Sphilip# https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2977177591Sedwin# 2978177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2979177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2980177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2981177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2982177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2983177591Sedwin# change some historic records as well. 2984177591Sedwin# 2985177591Sedwin# One example: 2986177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2987177591Sedwin 2988270817Spluknet# From Jesper N��rgaard Welen (2008-03-13): 2989177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2990177591Sedwin# web site, the Granma. Please check out 2991177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2992177591Sedwin# 2993270817Spluknet# Basically as expected after Steffen Thorsen's information, the change 2994177591Sedwin# will take place midnight between Saturday and Sunday. 2995177591Sedwin 2996177591Sedwin# From Arthur David Olson (2008-03-12): 2997177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2998177591Sedwin 2999189923Sedwin# From Alexander Krivenyshev (2009-03-04) 3000189923Sedwin# According to the Radio Reloj - Cuba will start Daylight Saving Time on 3001189923Sedwin# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 3002189923Sedwin# not on midnight March 14 / March 15 as previously thought. 3003189923Sedwin# 3004189923Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 3005189923Sedwin# (in Spanish) 3006189923Sedwin 3007189923Sedwin# From Arthur David Olson (2009-03-09) 3008189923Sedwin# I listened over the Internet to 3009189923Sedwin# http://media.enet.cu/readioreloj 3010189923Sedwin# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 3011270817Spluknet# the time was announced as "diez cinco" - the same time as here, indicating 3012189923Sedwin# that has indeed switched to DST. Assume second Sunday from 2009 forward. 3013189923Sedwin 3014219687Sedwin# From Steffen Thorsen (2011-03-08): 3015219687Sedwin# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 3016219687Sedwin# this year. Nothing about the end date known so far (if that has 3017219687Sedwin# changed at all). 3018219687Sedwin# 3019219687Sedwin# Source: 3020219687Sedwin# http://granma.co.cu/2011/03/08/nacional/artic01.html 3021219687Sedwin# 3022219687Sedwin# Our info: 3023325160Sphilip# https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 3024226976Sedwin# 3025226976Sedwin# From Steffen Thorsen (2011-10-30) 3026240457Sedwin# Cuba will end DST two weeks later this year. Instead of going back 3027226976Sedwin# tonight, it has been delayed to 2011-11-13 at 01:00. 3028226976Sedwin# 3029226976Sedwin# One source (Spanish) 3030226976Sedwin# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 3031226976Sedwin# 3032226976Sedwin# Our page: 3033325160Sphilip# https://www.timeanddate.com/news/time/cuba-time-changes-2011.html 3034240457Sedwin# 3035240457Sedwin# From Steffen Thorsen (2012-03-01) 3036240457Sedwin# According to Radio Reloj, Cuba will start DST on Midnight between March 3037240457Sedwin# 31 and April 1. 3038240457Sedwin# 3039240457Sedwin# Radio Reloj has the following info (Spanish): 3040240457Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 3041240457Sedwin# 3042240457Sedwin# Our info on it: 3043325160Sphilip# https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 3044219687Sedwin 3045242927Sedwin# From Steffen Thorsen (2012-11-03): 3046242927Sedwin# Radio Reloj and many other sources report that Cuba is changing back 3047242927Sedwin# to standard time on 2012-11-04: 3048242927Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 3049242927Sedwin# From Paul Eggert (2012-11-03): 3050242927Sedwin# For now, assume the future rule is first Sunday in November. 3051242927Sedwin 30522742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 30532742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 30542742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 30552742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 30562742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 30572742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 30582742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 30592742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 30602742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 30612742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 30622742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 30632742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 30642742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 30652742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 30662742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 30672742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 30682742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 30692742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 30702742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 307130711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 30722742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 30732742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 30742742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 307543014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 307620094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 307743014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 307843014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 307958787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 3080138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 3081259636SedwinRule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 3082259636SedwinRule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 3083226976SedwinRule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 3084177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 3085189923SedwinRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 3086219687SedwinRule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 3087219687SedwinRule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 3088226976SedwinRule Cuba 2011 only - Nov 13 0:00s 0 S 3089240457SedwinRule Cuba 2012 only - Apr 1 0:00s 1:00 D 3090242927SedwinRule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 3091240457SedwinRule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 30922742Swollman 30932742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30942742SwollmanZone America/Havana -5:29:28 - LMT 1890 309558787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 30962742Swollman -5:00 Cuba C%sT 30972742Swollman 30982742Swollman# Dominica 3099270817Spluknet# See America/Port_of_Spain. 31002742Swollman 31012742Swollman# Dominican Republic 310275267Swollman 310375267Swollman# From Steffen Thorsen (2000-10-30): 310475267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 310575267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 310675267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 310775267Swollman 310875267Swollman# From Paul Eggert (2000-12-04): 310975267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 311075267Swollman 311175267Swollman# From Rives McDow (2000-12-01): 311275267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 311375267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 311475267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 311575267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 311675267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 311775267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 311875267Swollman# decided to revert. 311975267Swollman 312075267Swollman 31212742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3122316350SbaptRule DR 1966 only - Oct 30 0:00 1:00 EDT 3123316350SbaptRule DR 1967 only - Feb 28 0:00 0 EST 3124316350SbaptRule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 3125316350SbaptRule DR 1970 only - Feb 21 0:00 0 EST 3126316350SbaptRule DR 1971 only - Jan 20 0:00 0 EST 3127316350SbaptRule DR 1972 1974 - Jan 21 0:00 0 EST 31282742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31292742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 31302742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 3131316350Sbapt -5:00 DR %s 1974 Oct 27 3132273719Sedwin -4:00 - AST 2000 Oct 29 2:00 3133273719Sedwin -5:00 US E%sT 2000 Dec 3 1:00 31342742Swollman -4:00 - AST 31352742Swollman 31362742Swollman# El Salvador 3137158421Swollman 31382742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 31392742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 31402742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 3141121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 3142121098Swollman# instead of America/San_Salvador. 31432742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3144273719SedwinZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 31452742Swollman -6:00 Salv C%sT 31462742Swollman 31472742Swollman# Grenada 31482742Swollman# Guadeloupe 3149270817Spluknet# St Barth��lemy 3150174242Sedwin# St Martin (French part) 3151270817Spluknet# See America/Port_of_Spain. 31522742Swollman 31532742Swollman# Guatemala 3154158421Swollman# 3155158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 3156158421Swollman# Diario Co Latino, at 3157270817Spluknet# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 3158158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 3159158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 3160158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 3161158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 3162163302Sru# From Paul Eggert (2006-06-22): 3163163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 3164163302Sru# (2006-04-19), says DST ends at 24:00. See 3165273719Sedwin# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 3166163302Sru 31672742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 31682742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 31692742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 31702742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 31712742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 317220094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 317320094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 3174158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 3175158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 31762742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31772742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 31782742Swollman -6:00 Guat C%sT 31792742Swollman 31802742Swollman# Haiti 3181149514Swollman# From Gwillim Law (2005-04-15): 3182270817Spluknet# Risto O. Nyk��nen wrote me that Haiti is now on DST. 3183270817Spluknet# I searched for confirmation, and I found a press release 3184149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3185270817Spluknet# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3186149514Swollman# 3187149514Swollman# "The Prime Minister's Communication Office notifies the public in general 3188149514Swollman# and the press in particular that, following a decision of the Interior 3189149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 3190149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 3191149514Swollman# Saturday the 2nd to Sunday the 3rd. 3192149514Swollman# 3193149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 3194149514Swollman# the population that the country's clocks will be set forward one hour 3195149514Swollman# starting at midnight. This provision will hold until the last Saturday in 3196149514Swollman# October 2005. 3197149514Swollman# 3198149514Swollman# "Port-au-Prince, March 31, 2005" 3199158421Swollman# 3200158421Swollman# From Steffen Thorsen (2006-04-04): 3201158421Swollman# I have been informed by users that Haiti observes DST this year like 3202158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 3203158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 3204158421Swollman# next year or if they will extend their DST like US/Canada next year). 3205158421Swollman# 3206158421Swollman# I have found this article about it (in French): 3207158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 3208158421Swollman# 3209158421Swollman# The reason seems to be an energy crisis. 3210149514Swollman 3211169811Swollman# From Stephen Colebourne (2007-02-22): 3212169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 3213158421Swollman 3214240457Sedwin# From Steffen Thorsen (2012-03-11): 3215240457Sedwin# According to several news sources, Haiti will observe DST this year, 3216240457Sedwin# apparently using the same start and end date as USA/Canada. 3217240457Sedwin# So this means they have already changed their time. 3218240457Sedwin# 3219240457Sedwin# http://www.alterpresse.org/spip.php?article12510 3220240457Sedwin# http://radiovision2000haiti.net/home/?p=13253 3221240457Sedwin# 3222240457Sedwin# From Arthur David Olson (2012-03-11): 3223240457Sedwin# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3224240457Sedwin# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3225248307Sedwin# Assume a US-style fall back as well. 3226240457Sedwin 3227248307Sedwin# From Steffen Thorsen (2013-03-10): 3228248307Sedwin# It appears that Haiti is observing DST this year as well, same rules 3229248307Sedwin# as US/Canada. They did it last year as well, and it looks like they 3230248307Sedwin# are going to observe DST every year now... 3231248307Sedwin# 3232248307Sedwin# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3233248307Sedwin# http://www.canalplushaiti.net/?p=6714 3234248307Sedwin 3235307362Sbapt# From Steffen Thorsen (2016-03-12): 3236307362Sbapt# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti 3237307362Sbapt# are not going on DST this year. Several other resources confirm this: ... 3238325160Sphilip# https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html 3239325160Sphilip# https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ 3240307362Sbapt# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ 3241307362Sbapt 3242316350Sbapt# From Steffen Thorsen (2017-03-12): 3243316350Sbapt# We have received 4 mails from different people telling that Haiti 3244316350Sbapt# has started DST again today, and this source seems to confirm that, 3245316350Sbapt# I have not been able to find a more authoritative source: 3246316350Sbapt# https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html 3247316350Sbapt 32482742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 32492742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 32502742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 32512742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3252158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3253158421Swollman# Go with IATA. 325443014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 325543014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3256169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3257169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3258307362SbaptRule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D 3259307362SbaptRule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S 3260316350SbaptRule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D 3261316350SbaptRule Haiti 2017 max - Nov Sun>=1 2:00 0 S 32622742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 32632742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 32642742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 32652742Swollman -5:00 Haiti E%sT 32662742Swollman 32672742Swollman# Honduras 3268158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3269158421Swollman 3270158421Swollman# From Paul Eggert (2006-05-05): 3271158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3272158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 3273158421Swollman# months until September. La Tribuna reported today 3274158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3275163302Sru# of Honduras, refused to back down on this. 3276158421Swollman 3277270817Spluknet# From Jesper N��rgaard Welen (2006-08-08): 3278163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 3279163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 3280163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3281163302Sru 3282163302Sru# From Paul Eggert (2006-08-08): 3283273719Sedwin# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3284273719Sedwin# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3285163302Sru# It mentions executive decree 18-2006. 3286163302Sru 3287163302Sru# From Steffen Thorsen (2006-08-17): 3288163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 3289163302Sru# published, I have located this authoritative source: 3290163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3291163302Sru 3292169811Swollman# From Steffen Thorsen (2007-03-30): 3293169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 3294169811Swollman# So it seems that Honduras will not enter DST this year.... 3295169811Swollman 3296158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3297158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3298158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 3299169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 3300169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 33012742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 33022742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3303158421Swollman -6:00 Hond C%sT 330443543Swollman# 330543543Swollman# Great Swan I ceded by US to Honduras in 1972 33062742Swollman 33072742Swollman# Jamaica 3308257697Sedwin# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3309257697Sedwin# unspecified official document, and says "This time is used throughout the 3310257697Sedwin# island". Go with Milne. Round to the nearest second as required by zic. 3311273719Sedwin# 3312273719Sedwin# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3313273719Sedwin# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3314273719Sedwin# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3315273719Sedwin# Manley's supporters associated this act with Manley's nickname "Joshua" 3316273719Sedwin# (recall that in the Bible the sun stood still at Joshua's request), 3317273719Sedwin# and with the Rod of Correction which Manley said he had received from 3318273719Sedwin# Haile Selassie, Emperor of Ethiopia. See: 3319273719Sedwin# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3320273719Sedwin# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3321273719Sedwin# 33222742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3323331663SphilipZone America/Jamaica -5:07:10 - LMT 1890 # Kingston 3324331663Sphilip -5:07:10 - KMT 1912 Feb # Kingston Mean Time 3325273719Sedwin -5:00 - EST 1974 332620094Swollman -5:00 US E%sT 1984 332720094Swollman -5:00 - EST 33282742Swollman 33292742Swollman# Martinique 33302742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3331273719SedwinZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3332273719Sedwin -4:04:20 - FFMT 1911 May # Fort-de-France MT 33332742Swollman -4:00 - AST 1980 Apr 6 33342742Swollman -4:00 1:00 ADT 1980 Sep 28 33352742Swollman -4:00 - AST 33362742Swollman 33372742Swollman# Montserrat 3338270817Spluknet# See America/Port_of_Spain. 33392742Swollman 33402742Swollman# Nicaragua 334143543Swollman# 3342158421Swollman# This uses Shanks & Pottenger for times before 2005. 334343543Swollman# 3344149514Swollman# From Steffen Thorsen (2005-04-12): 3345149514Swollman# I've got reports from 8 different people that Nicaragua just started 3346149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 3347149514Swollman# expensive petroleum. The exact end date for DST is not yet 3348149514Swollman# announced, only "September" but some sites also say "mid-September". 3349149514Swollman# Some background information is available on the President's official site: 3350149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3351149514Swollman# The Decree, no 23-2005 is available here: 3352149514Swollman# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf 3353149514Swollman# 3354149514Swollman# From Paul Eggert (2005-05-01): 3355149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 3356158421Swollman# assume that it is daylight saving.... 3357149514Swollman# 3358149514Swollman# From Gwillim Law (2005-04-21): 3359149514Swollman# The Associated Press story on the time change, which can be found at 3360149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3361273719Sedwin# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3362149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 3363270817Spluknet# during the Arnoldo Alem��n administration."... 3364149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 3365149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 3366149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 3367149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 3368149514Swollman# 3369270817Spluknet# From Jesper N��rgaard Welen (2005-11-02): 3370153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3371153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3372153670Swollman# (2005-09-26) 3373153670Swollman# 3374270817Spluknet# From Jesper N��rgaard Welen (2006-05-05): 3375158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3376158421Swollman# (my informal translation) 3377270817Spluknet# By order of the president of the republic, Enrique Bola��os, Nicaragua 3378158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 3379270817Spluknet# morning, and will stay that way until 30th of September. 3380158421Swollman# 3381270817Spluknet# From Jesper N��rgaard Welen (2006-09-30): 3382163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3383163302Sru# My informal translation runs: 3384163302Sru# The natural sun time is restored in all the national territory, in that the 3385163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 3386163302Sru# 33872742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 33882742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 33892742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3390149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 3391163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 3392158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 3393163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 33942742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 33952742SwollmanZone America/Managua -5:45:08 - LMT 1890 339686222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 33972742Swollman -6:00 - CST 1973 May 33982742Swollman -5:00 - EST 1975 Feb 16 3399273719Sedwin -6:00 Nic C%sT 1992 Jan 1 4:00 3400158421Swollman -5:00 - EST 1992 Sep 24 3401158421Swollman -6:00 - CST 1993 3402158421Swollman -5:00 - EST 1997 3403149514Swollman -6:00 Nic C%sT 34042742Swollman 34052742Swollman# Panama 34062742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 34072742SwollmanZone America/Panama -5:18:08 - LMT 1890 3408273719Sedwin -5:19:36 - CMT 1908 Apr 22 # Col��n Mean Time 34092742Swollman -5:00 - EST 3410307362SbaptLink America/Panama America/Cayman 34112742Swollman 34122742Swollman# Puerto Rico 3413257697Sedwin# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 34142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3415273719SedwinZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 34162742Swollman -4:00 - AST 1942 May 3 3417158421Swollman -4:00 US A%sT 1946 34182742Swollman -4:00 - AST 34192742Swollman 34202742Swollman# St Kitts-Nevis 34212742Swollman# St Lucia 3422270817Spluknet# See America/Port_of_Spain. 34232742Swollman 34242742Swollman# St Pierre and Miquelon 3425257697Sedwin# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 34262742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3427273719SedwinZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 34282742Swollman -4:00 - AST 1980 May 3429316350Sbapt -3:00 - -03 1987 3430316350Sbapt -3:00 Canada -03/-02 34312742Swollman 34322742Swollman# St Vincent and the Grenadines 3433270817Spluknet# See America/Port_of_Spain. 34342742Swollman 34352742Swollman# Turks and Caicos 3436169811Swollman# 3437169811Swollman# From Chris Dunn in 3438325160Sphilip# https://bugs.debian.org/415007 3439169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3440169811Swollman# daylight saving dates for time changes have been adjusted to match 3441169811Swollman# the recent U.S. change of dates. 3442169811Swollman# 3443169811Swollman# From Brian Inglis (2007-04-28): 3444169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3445169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3446169811Swollman# rows before that there is an out of date entry for Oct: 3447169811Swollman# "Eastern Standard Times Begins 2007 3448169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3449169811Swollman# indicating that the normal ET rules are followed. 3450169811Swollman# 3451273719Sedwin# From Paul Eggert (2014-08-19): 3452307362Sbapt# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: 3453273719Sedwin# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3454274563Sedwin# Model this as a switch from EST/EDT to AST ... 3455274563Sedwin# From Chris Walton (2014-11-04): 3456274563Sedwin# ... the TCI government appears to have delayed the switch to 3457274563Sedwin# "permanent daylight saving time" by one year.... 3458274563Sedwin# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3459169811Swollman# 3460325160Sphilip# From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen: 3461325160Sphilip# ... agreed to the reintroduction in TCI of Daylight Saving Time (DST) 3462325160Sphilip# during the summer months and Standard Time, also known as Local 3463325160Sphilip# Time, during the winter months with effect from April 2018 ... 3464325160Sphilip# https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3 3465325160Sphilip# 3466325160Sphilip# From Paul Eggert (2017-08-26): 3467325160Sphilip# The date of effect of the spring 2018 change appears to be March 11, 3468325160Sphilip# which makes more sense. See: Hamilton D. Time change back 3469325160Sphilip# by March 2018 for TCI. Magnetic Media. 2017-08-25. 3470325160Sphilip# http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/ 3471325160Sphilip# 34722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 34732742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 3474331663Sphilip -5:07:10 - KMT 1912 Feb # Kingston Mean Time 3475273719Sedwin -5:00 - EST 1979 3476274563Sedwin -5:00 US E%sT 2015 Nov Sun>=1 2:00 3477325160Sphilip -4:00 - AST 2018 Mar 11 3:00 3478325160Sphilip -5:00 US E%sT 34798029Swollman 348014343Swollman# British Virgin Is 348114343Swollman# Virgin Is 3482270817Spluknet# See America/Port_of_Spain. 3483270817Spluknet 3484270817Spluknet 3485270817Spluknet# Local Variables: 3486270817Spluknet# coding: utf-8 3487270817Spluknet# End: 3488