southamerica revision 273439
1# This file is in the public domain, so clarified as of 2# 2009-05-17 by Arthur David Olson. 3 4# This data is by no means authoritative; if you think you know better, 5# go ahead and edit the file (and please send any changes to 6# tz@iana.org for general use in the future). 7 8# From Paul Eggert (2006-03-22): 9# A good source for time zone historical data outside the U.S. is 10# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 11# San Diego: ACS Publications, Inc. (2003). 12# 13# For data circa 1899, a common source is: 14# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 15# <http://www.jstor.org/stable/1774359>. 16# 17# Gwillim Law writes that a good source 18# for recent time zone data is the International Air Transport 19# Association's Standard Schedules Information Manual (IATA SSIM), 20# published semiannually. Law sent in several helpful summaries 21# of the IATA's data after 1990. 22# 23# Except where otherwise noted, Shanks & Pottenger is the source for 24# entries through 1990, and IATA SSIM is the source for entries afterwards. 25# 26# Earlier editions of these tables used the North American style (e.g. ARST and 27# ARDT for Argentine Standard and Daylight Time), but the following quote 28# suggests that it's better to use European style (e.g. ART and ARST). 29# I suggest the use of _Summer time_ instead of the more cumbersome 30# _daylight-saving time_. _Summer time_ seems to be in general use 31# in Europe and South America. 32# --���E O Cutler, _New York Times_ (1937-02-14), quoted in 33# H L Mencken, _The American Language: Supplement I_ (1960), p 466 34# 35# Earlier editions of these tables also used the North American style 36# for time zones in Brazil, but this was incorrect, as Brazilians say 37# "summer time". Reinaldo Goulart, a S��o Paulo businessman active in 38# the railroad sector, writes (1999-07-06): 39# The subject of time zones is currently a matter of discussion/debate in 40# Brazil. Let's say that "the Bras��lia time" is considered the 41# "official time" because Bras��lia is the capital city. 42# The other three time zones are called "Bras��lia time "minus one" or 43# "plus one" or "plus two". As far as I know there is no such 44# name/designation as "Eastern Time" or "Central Time". 45# So I invented the following (English-language) abbreviations for now. 46# Corrections are welcome! 47# std dst 48# -2:00 FNT FNST Fernando de Noronha 49# -3:00 BRT BRST Bras��lia 50# -4:00 AMT AMST Amazon 51# -5:00 ACT ACST Acre 52 53############################################################################### 54 55############################################################################### 56 57# Argentina 58 59# From Bob Devine (1988-01-28): 60# Argentina: first Sunday in October to first Sunday in April since 1976. 61# Double Summer time from 1969 to 1974. Switches at midnight. 62 63# From U. S. Naval Observatory (1988-01-19): 64# ARGENTINA 3 H BEHIND UTC 65 66# From Hernan G. Otero (1995-06-26): 67# I am sending modifications to the Argentine time zone table... 68# AR was chosen because they are the ISO letters that represent Argentina. 69 70# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 71Rule Arg 1930 only - Dec 1 0:00 1:00 S 72Rule Arg 1931 only - Apr 1 0:00 0 - 73Rule Arg 1931 only - Oct 15 0:00 1:00 S 74Rule Arg 1932 1940 - Mar 1 0:00 0 - 75Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 76Rule Arg 1940 only - Jul 1 0:00 1:00 S 77Rule Arg 1941 only - Jun 15 0:00 0 - 78Rule Arg 1941 only - Oct 15 0:00 1:00 S 79Rule Arg 1943 only - Aug 1 0:00 0 - 80Rule Arg 1943 only - Oct 15 0:00 1:00 S 81Rule Arg 1946 only - Mar 1 0:00 0 - 82Rule Arg 1946 only - Oct 1 0:00 1:00 S 83Rule Arg 1963 only - Oct 1 0:00 0 - 84Rule Arg 1963 only - Dec 15 0:00 1:00 S 85Rule Arg 1964 1966 - Mar 1 0:00 0 - 86Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 87Rule Arg 1967 only - Apr 2 0:00 0 - 88Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 89Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 90Rule Arg 1974 only - Jan 23 0:00 1:00 S 91Rule Arg 1974 only - May 1 0:00 0 - 92Rule Arg 1988 only - Dec 1 0:00 1:00 S 93# 94# From Hernan G. Otero (1995-06-26): 95# These corrections were contributed by InterSoft Argentina S.A., 96# obtaining the data from the: 97# Talleres de Hidrograf��a Naval Argentina 98# (Argentine Naval Hydrography Institute) 99Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 100Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 101# 102# From Hernan G. Otero (1995-06-26): 103# From this moment on, the law that mandated the daylight saving 104# time corrections was derogated and no more modifications 105# to the time zones (for daylight saving) are now made. 106# 107# From Rives McDow (2000-01-10): 108# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 109# which did not result in the switch of a time zone, as they stayed 9 hours 110# from the International Date Line. 111Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 112# From Paul Eggert (2007-12-28): 113# DST was set to expire on March 5, not March 3, but since it was converted 114# to standard time on March 3 it's more convenient for us to pretend that 115# it ended on March 3. 116Rule Arg 2000 only - Mar 3 0:00 0 - 117# 118# From Peter Gradelski via Steffen Thorsen (2000-03-01): 119# We just checked with our S��o Paulo office and they say the government of 120# Argentina decided not to become one of the countries that go on or off DST. 121# So Buenos Aires should be -3 hours from GMT at all times. 122# 123# From Fabi��n L. Arce Jofr�� (2000-04-04): 124# The law that claimed DST for Argentina was derogated by President Fernando 125# de la R��a on March 2, 2000, because it would make people spend more energy 126# in the winter time, rather than less. The change took effect on March 3. 127# 128# From Mariano Absatz (2001-06-06): 129# one of the major newspapers here in Argentina said that the 1999 130# Timezone Law (which never was effectively applied) will (would?) be 131# in effect.... The article is at 132# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 133# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 134# 1999-09-17, and published 1999-09-21. The official publication is at: 135# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 136# Regretfully, you have to subscribe (and pay) for the on-line version.... 137# 138# (2001-06-12): 139# the timezone for Argentina will not change next Sunday. 140# Apparently it will do so on Sunday 24th.... 141# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 142# 143# (2001-06-25): 144# Last Friday (yes, the last working day before the date of the change), the 145# Senate annulled the 1999 law that introduced the changes later postponed. 146# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 147# It remains the vote of the Deputies..., but it will be the same.... 148# This kind of things had always been done this way in Argentina. 149# We are still -03:00 all year round in all of the country. 150# 151# From Steffen Thorsen (2007-12-21): 152# A user (Leonardo Chaim) reported that Argentina will adopt DST.... 153# all of the country (all Zone-entries) are affected. News reports like 154# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate 155# that Argentina will use DST next year as well, from October to 156# March, although exact rules are not given. 157# 158# From Jesper N��rgaard Welen (2007-12-26) 159# The last hurdle of Argentina DST is over, the proposal was approved in 160# the lower chamber too (Diputados) with a vote 192 for and 2 against. 161# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to 162# the original scanned proposal, where the dates and the zero hours are 163# clear and unambiguous...This is the article about final approval: 164# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 165# 166# From Paul Eggert (2007-12-22): 167# For dates after mid-2008, the following rules are my guesses and 168# are quite possibly wrong, but are more likely than no DST at all. 169 170# From Alexander Krivenyshev (2008-09-05): 171# As per message from Carlos Alberto Fonseca Arauz (Nicaragua), 172# Argentina will start DST on Sunday October 19, 2008. 173# 174# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html 175# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) 176 177# From Rodrigo Severo (2008-10-06): 178# Here is some info available at a Gentoo bug related to TZ on Argentina's DST: 179# ... 180# ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 ------- 181# Hi, there is a problem with timezone-data-2008e and maybe with 182# timezone-data-2008f 183# Argentinian law [Number] 25.155 is no longer valid. 184# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm 185# The new one is law [Number] 26.350 186# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm 187# So there is no summer time in Argentina for now. 188 189# From Mariano Absatz (2008-10-20): 190# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina 191# From 2008-10-19 until 2009-03-15 192# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 193# 194 195# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 196# 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La 197# Pampa, Neuqu��n, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego 198# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 199# 200# Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying 201# it will not apply DST either (even when it was not included in Decree 1705/2008) 202# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc 203 204# From fullinet (2009-10-18): 205# As announced in 206# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 207# (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change") 208# 209# "Por el momento, el Gobierno Nacional resolvi�� no modificar la hora 210# oficial, decisi��n que estaba en estudio para su implementaci��n el 211# domingo 18 de octubre. Desde el Ministerio de Planificaci��n se anunci�� 212# que la Argentina hoy, en estas condiciones meteorol��gicas, no necesita 213# la modificaci��n del huso horario, ya que 2009 nos encuentra con 214# crecimiento en la producci��n y distribuci��n energ��tica." 215 216Rule Arg 2007 only - Dec 30 0:00 1:00 S 217Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 - 218Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S 219 220# From Mariano Absatz (2004-05-21): 221# Today it was officially published that the Province of Mendoza is changing 222# its timezone this winter... starting tomorrow night.... 223# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 224# From Paul Eggert (2004-05-24): 225# It's Law No. 7,210. This change is due to a public power emergency, so for 226# now we'll assume it's for this year only. 227# 228# From Paul Eggert (2006-03-22): 229# Hora de verano para la Republica Argentina (2003-06-08) 230# <http://www.spicasc.net/horvera.html> 231# says that standard time in Argentina from 1894-10-31 232# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 233# over Shanks & Pottenger. 234# 235# From Mariano Absatz (2004-06-05): 236# These media articles from a major newspaper mostly cover the current state: 237# http://www.lanacion.com.ar/04/05/27/de_604825.asp 238# http://www.lanacion.com.ar/04/05/28/de_605203.asp 239# 240# The following eight (8) provinces pulled clocks back to UTC-04:00 at 241# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 242# Apparently, all nine provinces would go back to UTC-03:00 at the same 243# time in October 17th. 244# 245# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 246# Tierra del Fuego, Tucum��n. 247# 248# From Mariano Absatz (2004-06-14): 249# ... this weekend, the Province of Tucum��n decided it'd go back to UTC-03:00 250# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 251# annoyance with the change is much higher than the power savings obtained.... 252# 253# From Gwillim Law (2004-06-14): 254# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 255# "The time change in Tierra del Fuego was a conflicted decision from 256# the start. The government had decreed that the measure would take 257# effect on June 1, but a normative error forced the new time to begin 258# three days earlier, from a Saturday to a Sunday.... 259# Our understanding was that the change was originally scheduled to take place 260# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 261# provinces). Sunday was May 30, only two days earlier. So the article 262# contains a contradiction. I would give more credence to the Saturday/Sunday 263# date than the "three days earlier" phrase, and conclude that Tierra del 264# Fuego set its clocks back at 2004-05-30 00:00. 265# 266# From Steffen Thorsen (2004-10-05): 267# The previous law 7210 which changed the province of Mendoza's time zone 268# back in May have been modified slightly in a new law 7277, which set the 269# new end date to 2004-09-26 (original date was 2004-10-17). 270# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 271# 272# From Mariano Absatz (2004-10-05): 273# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 274# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 275# at midnight between Saturday, July 24th and Sunday, July 25th.... 276# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 277# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 278# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 279 280# From Alex Krivenyshev (2008-01-17): 281# Here are articles that Argentina Province San Luis is planning to end DST 282# as earlier as upcoming Monday January 21, 2008 or February 2008: 283# 284# Provincia argentina retrasa reloj y marca diferencia con resto del pa��s 285# (Argentine Province delayed clock and mark difference with the rest of the 286# country) 287# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel 288# 289# Es inminente que en San Luis atrasen una hora los relojes 290# (It is imminent in San Luis clocks one hour delay) 291# http://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html 292# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html 293 294# From Jesper N��rgaard Welen (2008-01-18): 295# The page of the San Luis provincial government 296# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 297# confirms what Alex Krivenyshev has earlier sent to the tz 298# emailing list about that San Luis plans to return to standard 299# time much earlier than the rest of the country. It also 300# confirms that upon request the provinces San Juan and Mendoza 301# refused to follow San Luis in this change. 302# 303# The change is supposed to take place Monday the 21.st at 0:00 304# hours. As far as I understand it if this goes ahead, we need 305# a new timezone for San Luis (although there are also documented 306# independent changes in the southamerica file of San Luis in 307# 1990 and 1991 which has not been confirmed). 308 309# From Jesper N��rgaard Welen (2008-01-25): 310# Unfortunately the below page has become defunct, about the San Luis 311# time change. Perhaps because it now is part of a group of pages "Most 312# important pages of 2008." 313# 314# You can use 315# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 316# instead it seems. Or use "Buscador" from the main page of the San Luis 317# government, and fill in "huso" and click OK, and you will get 3 pages 318# from which the first one is identical to the above. 319 320# From Mariano Absatz (2008-01-28): 321# I can confirm that the Province of San Luis (and so far only that 322# province) decided to go back to UTC-3 effective midnight Jan 20th 2008 323# (that is, Monday 21st at 0:00 is the time the clocks were delayed back 324# 1 hour), and they intend to keep UTC-3 as their timezone all year round 325# (that is, unless they change their mind any minute now). 326# 327# So we'll have to add yet another city to 'southamerica' (I think San 328# Luis city is the mos populated city in the Province, so it'd be 329# America/Argentina/San_Luis... of course I can't remember if San Luis's 330# history of particular changes goes along with Mendoza or San Juan :-( 331# (I only remember not being able to collect hard facts about San Luis 332# back in 2004, when these provinces changed to UTC-4 for a few days, I 333# mailed them personally and never got an answer). 334 335# From Paul Eggert (2008-06-30): 336# Unless otherwise specified, data are from Shanks & Pottenger through 1992, 337# from the IATA otherwise. As noted below, Shanks & Pottenger say that 338# America/Cordoba split into 6 subregions during 1991/1992, one of which 339# was America/San_Luis, but we haven't verified this yet so for now we'll 340# keep America/Cordoba a single region rather than splitting it into the 341# other 5 subregions. 342 343# From Mariano Absatz (2009-03-13): 344# Yesterday (with our usual 2-day notice) the Province of San Luis 345# decided that next Sunday instead of "staying" @utc-03:00 they will go 346# to utc-04:00 until the second Saturday in October... 347# 348# The press release is at 349# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 350# (I couldn't find the decree, but www.sanluis.gov.ar 351# is the official page for the Province Government.) 352# 353# There's also a note in only one of the major national papers ... 354# http://www.lanacion.com.ar/nota.asp?nota_id=1107912 355# 356# The press release says [quick and dirty translation]: 357# ... announced that next Sunday, at 00:00, Puntanos (the San Luis 358# inhabitants) will have to turn back one hour their clocks 359# 360# Since then, San Luis will establish its own Province timezone. Thus, 361# during 2009, this timezone change will run from 00:00 the third Sunday 362# in March until 24:00 of the second Saturday in October. 363 364# From Mariano Absatz (2009-10-16): 365# ...the Province of San Luis is a case in itself. 366# 367# The Law at 368# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276 369# is ambiguous because establishes a calendar from the 2nd Sunday in 370# October at 0:00 thru the 2nd Saturday in March at 24:00 and the 371# complement of that starting on the 2nd Sunday of March at 0:00 and 372# ending on the 2nd Saturday of March at 24:00. 373# 374# This clearly breaks every time the 1st of March or October is a Sunday. 375# 376# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd 377# Sunday of October and March. 378# 379# The problem is that the changes in the rest of the Provinces that did 380# change in 2007/2008, were made according to the Federal Law and Decrees 381# that did so on the 3rd Sunday of October and March. 382# 383# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday 384# (October 11th) at 0:00. 385# 386# So I guess a new set of rules, besides "Arg", must be made and the last 387# America/Argentina/San_Luis entries should change to use these... 388# 389# I'm enclosing a patch that does what I say... regretfully, the San Luis 390# timezone must be called "WART/WARST" even when most of the time (like, 391# right now) WARST == ART... that is, since last Sunday, all the country 392# is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest 393# of the country calls it "ART". 394# ... 395 396# From Alexander Krivenyshev (2010-04-09): 397# According to news reports from El Diario de la Republica Province San 398# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time 399# after April 11, 2010 - will continue to have same time as rest of 400# Argentina (UTC-3) (no DST). 401# 402# Confirmaron la pr��rroga del huso horario de verano (Spanish) 403# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 404# or (some English translation): 405# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html 406 407# From Mariano Absatz (2010-04-12): 408# yes...I can confirm this...and given that San Luis keeps calling 409# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" 410# rules...San Luis is still using "Western ARgentina Time" and it got 411# stuck on Summer daylight savings time even though the summer is over. 412 413# From Paul Eggert (2013-09-05): 414# Perhaps San Luis operates on the legal fiction that it is at UTC-4 415# with perpetual summer time, but ordinary usage typically seems to 416# just say it's at UTC-3; see, for example, 417# <http://es.wikipedia.org/wiki/Hora_oficial_argentina>. 418# We've documented similar situations as being plain changes to 419# standard time, so let's do that here too. This does not change UTC 420# offsets, only tm_isdst and the time zone abbreviations. One minor 421# plus is that this silences a zic complaint that there's no POSIX TZ 422# setting for time stamps past 2038. 423 424# From Paul Eggert (2013-02-21): 425# Milne says C��rdoba time was -4:16:48.2. Round to the nearest second. 426 427# Zone NAME GMTOFF RULES FORMAT [UNTIL] 428# 429# Buenos Aires (BA), Capital Federal (CF), 430Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 431 -4:16:48 - CMT 1920 May # C��rdoba Mean Time 432 -4:00 - ART 1930 Dec 433 -4:00 Arg AR%sT 1969 Oct 5 434 -3:00 Arg AR%sT 1999 Oct 3 435 -4:00 Arg AR%sT 2000 Mar 3 436 -3:00 Arg AR%sT 437# 438# C��rdoba (CB), Santa Fe (SF), Entre R��os (ER), Corrientes (CN), Misiones (MN), 439# Chaco (CC), Formosa (FM), Santiago del Estero (SE) 440# 441# Shanks & Pottenger also make the following claims, which we haven't verified: 442# - Formosa switched to -3:00 on 1991-01-07. 443# - Misiones switched to -3:00 on 1990-12-29. 444# - Chaco switched to -3:00 on 1991-01-04. 445# - Santiago del Estero switched to -4:00 on 1991-04-01, 446# then to -3:00 on 1991-04-26. 447# 448Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 449 -4:16:48 - CMT 1920 May 450 -4:00 - ART 1930 Dec 451 -4:00 Arg AR%sT 1969 Oct 5 452 -3:00 Arg AR%sT 1991 Mar 3 453 -4:00 - WART 1991 Oct 20 454 -3:00 Arg AR%sT 1999 Oct 3 455 -4:00 Arg AR%sT 2000 Mar 3 456 -3:00 Arg AR%sT 457# 458# Salta (SA), La Pampa (LP), Neuqu��n (NQ), Rio Negro (RN) 459Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 460 -4:16:48 - CMT 1920 May 461 -4:00 - ART 1930 Dec 462 -4:00 Arg AR%sT 1969 Oct 5 463 -3:00 Arg AR%sT 1991 Mar 3 464 -4:00 - WART 1991 Oct 20 465 -3:00 Arg AR%sT 1999 Oct 3 466 -4:00 Arg AR%sT 2000 Mar 3 467 -3:00 Arg AR%sT 2008 Oct 18 468 -3:00 - ART 469# 470# Tucum��n (TM) 471Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 472 -4:16:48 - CMT 1920 May 473 -4:00 - ART 1930 Dec 474 -4:00 Arg AR%sT 1969 Oct 5 475 -3:00 Arg AR%sT 1991 Mar 3 476 -4:00 - WART 1991 Oct 20 477 -3:00 Arg AR%sT 1999 Oct 3 478 -4:00 Arg AR%sT 2000 Mar 3 479 -3:00 - ART 2004 Jun 1 480 -4:00 - WART 2004 Jun 13 481 -3:00 Arg AR%sT 482# 483# La Rioja (LR) 484Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 485 -4:16:48 - CMT 1920 May 486 -4:00 - ART 1930 Dec 487 -4:00 Arg AR%sT 1969 Oct 5 488 -3:00 Arg AR%sT 1991 Mar 1 489 -4:00 - WART 1991 May 7 490 -3:00 Arg AR%sT 1999 Oct 3 491 -4:00 Arg AR%sT 2000 Mar 3 492 -3:00 - ART 2004 Jun 1 493 -4:00 - WART 2004 Jun 20 494 -3:00 Arg AR%sT 2008 Oct 18 495 -3:00 - ART 496# 497# San Juan (SJ) 498Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 499 -4:16:48 - CMT 1920 May 500 -4:00 - ART 1930 Dec 501 -4:00 Arg AR%sT 1969 Oct 5 502 -3:00 Arg AR%sT 1991 Mar 1 503 -4:00 - WART 1991 May 7 504 -3:00 Arg AR%sT 1999 Oct 3 505 -4:00 Arg AR%sT 2000 Mar 3 506 -3:00 - ART 2004 May 31 507 -4:00 - WART 2004 Jul 25 508 -3:00 Arg AR%sT 2008 Oct 18 509 -3:00 - ART 510# 511# Jujuy (JY) 512Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 513 -4:16:48 - CMT 1920 May 514 -4:00 - ART 1930 Dec 515 -4:00 Arg AR%sT 1969 Oct 5 516 -3:00 Arg AR%sT 1990 Mar 4 517 -4:00 - WART 1990 Oct 28 518 -4:00 1:00 WARST 1991 Mar 17 519 -4:00 - WART 1991 Oct 6 520 -3:00 1:00 ARST 1992 521 -3:00 Arg AR%sT 1999 Oct 3 522 -4:00 Arg AR%sT 2000 Mar 3 523 -3:00 Arg AR%sT 2008 Oct 18 524 -3:00 - ART 525# 526# Catamarca (CT), Chubut (CH) 527Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 528 -4:16:48 - CMT 1920 May 529 -4:00 - ART 1930 Dec 530 -4:00 Arg AR%sT 1969 Oct 5 531 -3:00 Arg AR%sT 1991 Mar 3 532 -4:00 - WART 1991 Oct 20 533 -3:00 Arg AR%sT 1999 Oct 3 534 -4:00 Arg AR%sT 2000 Mar 3 535 -3:00 - ART 2004 Jun 1 536 -4:00 - WART 2004 Jun 20 537 -3:00 Arg AR%sT 2008 Oct 18 538 -3:00 - ART 539# 540# Mendoza (MZ) 541Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 542 -4:16:48 - CMT 1920 May 543 -4:00 - ART 1930 Dec 544 -4:00 Arg AR%sT 1969 Oct 5 545 -3:00 Arg AR%sT 1990 Mar 4 546 -4:00 - WART 1990 Oct 15 547 -4:00 1:00 WARST 1991 Mar 1 548 -4:00 - WART 1991 Oct 15 549 -4:00 1:00 WARST 1992 Mar 1 550 -4:00 - WART 1992 Oct 18 551 -3:00 Arg AR%sT 1999 Oct 3 552 -4:00 Arg AR%sT 2000 Mar 3 553 -3:00 - ART 2004 May 23 554 -4:00 - WART 2004 Sep 26 555 -3:00 Arg AR%sT 2008 Oct 18 556 -3:00 - ART 557# 558# San Luis (SL) 559 560Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - 561Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S 562 563Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 564 -4:16:48 - CMT 1920 May 565 -4:00 - ART 1930 Dec 566 -4:00 Arg AR%sT 1969 Oct 5 567 -3:00 Arg AR%sT 1990 568 -3:00 1:00 ARST 1990 Mar 14 569 -4:00 - WART 1990 Oct 15 570 -4:00 1:00 WARST 1991 Mar 1 571 -4:00 - WART 1991 Jun 1 572 -3:00 - ART 1999 Oct 3 573 -4:00 1:00 WARST 2000 Mar 3 574 -3:00 - ART 2004 May 31 575 -4:00 - WART 2004 Jul 25 576 -3:00 Arg AR%sT 2008 Jan 21 577 -4:00 SanLuis WAR%sT 2009 Oct 11 578 -3:00 - ART 579# 580# Santa Cruz (SC) 581Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 582 -4:16:48 - CMT 1920 May # C��rdoba Mean Time 583 -4:00 - ART 1930 Dec 584 -4:00 Arg AR%sT 1969 Oct 5 585 -3:00 Arg AR%sT 1999 Oct 3 586 -4:00 Arg AR%sT 2000 Mar 3 587 -3:00 - ART 2004 Jun 1 588 -4:00 - WART 2004 Jun 20 589 -3:00 Arg AR%sT 2008 Oct 18 590 -3:00 - ART 591# 592# Tierra del Fuego, Ant��rtida e Islas del Atl��ntico Sur (TF) 593Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 594 -4:16:48 - CMT 1920 May # C��rdoba Mean Time 595 -4:00 - ART 1930 Dec 596 -4:00 Arg AR%sT 1969 Oct 5 597 -3:00 Arg AR%sT 1999 Oct 3 598 -4:00 Arg AR%sT 2000 Mar 3 599 -3:00 - ART 2004 May 30 600 -4:00 - WART 2004 Jun 20 601 -3:00 Arg AR%sT 2008 Oct 18 602 -3:00 - ART 603 604# Aruba 605Link America/Curacao America/Aruba 606 607# Bolivia 608# Zone NAME GMTOFF RULES FORMAT [UNTIL] 609Zone America/La_Paz -4:32:36 - LMT 1890 610 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 611 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 612 -4:00 - BOT # Bolivia Time 613 614# Brazil 615 616# From Paul Eggert (1993-11-18): 617# The mayor of Rio recently attempted to change the time zone rules 618# just in his city, in order to leave more summer time for the tourist trade. 619# The rule change lasted only part of the day; 620# the federal government refused to follow the city's rules, and business 621# was in a chaos, so the mayor backed down that afternoon. 622 623# From IATA SSIM (1996-02): 624# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 625# Santa Catarina (SC), Paran�� (PR), S��o Paulo (SP), Rio de Janeiro (RJ), 626# Esp��rito Santo (ES), Minas Gerais (MG), Bahia (BA), Goi��s (GO), 627# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 628# [The last three states are new to this issue of the IATA SSIM.] 629 630# From Gwillim Law (1996-10-07): 631# Geography, history (Tocantins was part of Goi��s until 1989), and other 632# sources of time zone information lead me to believe that AL, SE, and TO were 633# always in BR1, and so the only change was whether or not they observed DST.... 634# The earliest issue of the SSIM I have is 2/91. Each issue from then until 635# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 636# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 637# (UTC-4).... The other two time zones given for Brazil are BR3, which is 638# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 639# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 640# become part of the state of Pernambuco). The boundary between BR1 and BR2 641# has never been clearly stated. They've simply been called East and West. 642# However, some conclusions can be drawn from another IATA manual: the Airline 643# Coding Directory, which lists close to 400 airports in Brazil. For each 644# airport it gives a time zone which is coded to the SSIM. From that 645# information, I'm led to conclude that the states of Amap�� (AP), Cear�� (CE), 646# Maranh��o (MA), Para��ba (PR), Pernambuco (PE), Piau�� (PI), and Rio Grande do 647# Norte (RN), and the eastern part of Par�� (PA) are all in BR1 without DST. 648 649# From Marcos Tadeu (1998-09-27): 650# Brazilian official page <http://pcdsh01.on.br/verao1.html> 651 652# From Jesper N��rgaard (2000-11-03): 653# [For an official list of which regions in Brazil use which time zones, see:] 654# http://pcdsh01.on.br/Fusbr.htm 655# http://pcdsh01.on.br/Fusbrhv.htm 656 657# From Celso Doria via David Madeo (2002-10-09): 658# The reason for the delay this year has to do with elections in Brazil. 659# 660# Unlike in the United States, elections in Brazil are 100% computerized and 661# the results are known almost immediately. Yesterday, it was the first 662# round of the elections when 115 million Brazilians voted for President, 663# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 664# counting (or re-counting) votes anymore and we know there will be a second 665# round for the Presidency and also for some Governors. The 2nd round will 666# take place on October 27th. 667# 668# The reason why the DST will only begin November 3rd is that the thousands 669# of electoral machines used cannot have their time changed, and since the 670# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 671# the Government decided to postpone DST, instead of changing the Constitution 672# (maybe, for the next elections, it will be possible to change the clock)... 673 674# From Rodrigo Severo (2004-10-04): 675# It's just the biannual change made necessary by the much hyped, supposedly 676# modern Brazilian eletronic voting machines which, apparently, can't deal 677# with a time change between the first and the second rounds of the elections. 678 679# From Steffen Thorsen (2007-09-20): 680# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 681# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 682 683# From Paul Schulze (2008-06-24): 684# ...by law number 11.662 of April 24, 2008 (published in the "Diario 685# Oficial da Uni��o"...) in Brazil there are changes in the timezones, 686# effective today (00:00am at June 24, 2008) as follows: 687# 688# a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the 689# part of the Amazonas state that had this timezone now being put to the 690# timezone UTC+4 691# b) The whole Par�� state now is put at timezone UTC+3, instead of just 692# part of it, as was before. 693# 694# This change follows a proposal of senator Tiao Viana of Acre state, that 695# proposed it due to concerns about open television channels displaying 696# programs inappropriate to youths in the states that had the timezone 697# UTC+5 too early in the night. In the occasion, some more corrections 698# were proposed, trying to unify the timezones of any given state. This 699# change modifies timezone rules defined in decree 2.784 of 18 June, 700# 1913. 701 702# From Rodrigo Severo (2008-06-24): 703# Just correcting the URL: 704# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008 705# 706# As a result of the above Decree I believe the America/Rio_Branco 707# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall 708# be created to represent the...west side of the Par�� State. I 709# suggest this new timezone be called Santarem as the most 710# important/populated city in the affected area. 711# 712# This new timezone would be the same as the Rio_Branco timezone up to 713# the 2008/06/24 change which would be to UTC-3 instead of UTC-4. 714 715# From Alex Krivenyshev (2008-06-24): 716# This is a quick reference page for New and Old Brazil Time Zones map. 717# http://www.worldtimezone.com/brazil-time-new-old.php 718# 719# - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05 720# (state Acre and the part of the Amazonas will be UTC/GMT-04) - western 721# part of Par state is moving to one timezone UTC-03 (from UTC-04). 722 723# From Paul Eggert (2002-10-10): 724# The official decrees referenced below are mostly taken from 725# Decretos sobre o Hor��rio de Ver��o no Brasil 726# <http://pcdsh01.on.br/DecHV.html>. 727 728# From Steffen Thorsen (2008-08-29): 729# As announced by the government and many newspapers in Brazil late 730# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and 731# it will end on 2009-02-15 (current rule for Brazil is fine). Based on 732# past years experience with the elections, there was a good chance that 733# the start was postponed to November, but it did not happen this year. 734# 735# It has not yet been posted to http://pcdsh01.on.br/DecHV.html 736# 737# An official page about it: 738# http://www.mme.gov.br/site/news/detail.do?newsId=16722 739# Note that this link does not always work directly, but must be accessed 740# by going to 741# http://www.mme.gov.br/first 742# 743# One example link that works directly: 744# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 745# (Portuguese) 746# 747# We have a written a short article about it as well: 748# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html 749# 750# From Alexander Krivenyshev (2011-10-04): 751# State Bahia will return to Daylight savings time this year after 8 years off. 752# The announcement was made by Governor Jaques Wagner in an interview to a 753# television station in Salvador. 754 755# In Portuguese: 756# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html 757# http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html 758 759# From Guilherme Bernardes Rodrigues (2011-10-07): 760# There is news in the media, however there is still no decree about it. 761# I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the 762# official agency about time in Brazil, and she confirmed that the old rule is 763# still in force. 764 765# From Guilherme Bernardes Rodrigues (2011-10-14) 766# It's official, the President signed a decree that includes Bahia in summer 767# time. 768# [ and in a second message (same day): ] 769# I found the decree. 770# 771# DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011 772# Link : 773# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 774 775# From Kelley Cook (2012-10-16): 776# The governor of state of Bahia in Brazil announced on Thursday that 777# due to public pressure, he is reversing the DST policy they implemented 778# last year and will not be going to Summer Time on October 21st.... 779# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia 780 781# From Rodrigo Severo (2012-10-16): 782# Tocantins state will have DST. 783# http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html 784 785# From Steffen Thorsen (2013-09-20): 786# Tocantins in Brazil is very likely not to observe DST from October.... 787# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto 788# We will keep this article updated when this is confirmed: 789# http://www.timeanddate.com/news/time/brazil-starts-dst-2013.html 790 791# From Steffen Thorsen (2013-10-17): 792# http://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html 793# Senator Jorge Viana announced that Acre will change time zone on November 10. 794# He did not specify the time of the change, nor if western parts of Amazonas 795# will change as well. 796# 797# From Paul Eggert (2013-10-17): 798# For now, assume western Amazonas will change as well. 799 800# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 801# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01) 802# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10) 803Rule Brazil 1931 only - Oct 3 11:00 1:00 S 804Rule Brazil 1932 1933 - Apr 1 0:00 0 - 805Rule Brazil 1932 only - Oct 3 0:00 1:00 S 806# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10) 807# revoked DST. 808# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24) 809# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13) 810Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 811Rule Brazil 1950 only - Apr 16 1:00 0 - 812Rule Brazil 1951 1952 - Apr 1 0:00 0 - 813# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24) 814Rule Brazil 1953 only - Mar 1 0:00 0 - 815# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30) 816# revoked DST. 817# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18) 818# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 819# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 820# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03) 821# extended the above decree to all of the national territory on 12-09. 822Rule Brazil 1963 only - Dec 9 0:00 1:00 S 823# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25) 824# extended summer time by one day to 1964-03-01 00:00 (start of school). 825Rule Brazil 1964 only - Mar 1 0:00 0 - 826# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27) 827Rule Brazil 1965 only - Jan 31 0:00 1:00 S 828Rule Brazil 1965 only - Mar 31 0:00 0 - 829# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22) 830Rule Brazil 1965 only - Dec 1 0:00 1:00 S 831# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18) 832Rule Brazil 1966 1968 - Mar 1 0:00 0 - 833Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 834# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15) 835# revoked DST. 836# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27) 837Rule Brazil 1985 only - Nov 2 0:00 1:00 S 838# Decree 92,310 (1986-01-21) 839# Decree 92,463 (1986-03-13) 840Rule Brazil 1986 only - Mar 15 0:00 0 - 841# Decree 93,316 (1986-10-01) 842Rule Brazil 1986 only - Oct 25 0:00 1:00 S 843Rule Brazil 1987 only - Feb 14 0:00 0 - 844# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22) 845Rule Brazil 1987 only - Oct 25 0:00 1:00 S 846Rule Brazil 1988 only - Feb 7 0:00 0 - 847# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12) 848# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 849Rule Brazil 1988 only - Oct 16 0:00 1:00 S 850Rule Brazil 1989 only - Jan 29 0:00 0 - 851# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21) 852# with the same exceptions 853Rule Brazil 1989 only - Oct 15 0:00 1:00 S 854Rule Brazil 1990 only - Feb 11 0:00 0 - 855# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17) 856# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 857# Decree 99,629 (1990-10-19) adds BA, MT. 858Rule Brazil 1990 only - Oct 21 0:00 1:00 S 859Rule Brazil 1991 only - Feb 17 0:00 0 - 860# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25) 861# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 862Rule Brazil 1991 only - Oct 20 0:00 1:00 S 863Rule Brazil 1992 only - Feb 9 0:00 0 - 864# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16) 865# adopted by same states. 866Rule Brazil 1992 only - Oct 25 0:00 1:00 S 867Rule Brazil 1993 only - Jan 31 0:00 0 - 868# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28) 869# adopted by same states, plus AM. 870# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22; 871# web page corrected 2004-01-07) adopted by same states, minus AM. 872# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14) 873# adopted by same states, plus MT and TO. 874# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13) 875# adds AL, SE. 876Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 877Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 878Rule Brazil 1996 only - Feb 11 0:00 0 - 879# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04) 880# adopted by same states, minus AL, SE. 881Rule Brazil 1996 only - Oct 6 0:00 1:00 S 882Rule Brazil 1997 only - Feb 16 0:00 0 - 883# From Daniel C. Sobral (1998-02-12): 884# In 1997, the DS began on October 6. The stated reason was that 885# because international television networks ignored Brazil's policy on DS, 886# they bought the wrong times on satellite for coverage of Pope's visit. 887# This year, the ending date of DS was postponed to March 1 888# to help dealing with the shortages of electric power. 889# 890# Decree 2,317 (1997-09-04), adopted by same states. 891Rule Brazil 1997 only - Oct 6 0:00 1:00 S 892# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG> 893# (1998-02-10) 894Rule Brazil 1998 only - Mar 1 0:00 0 - 895# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11) 896# adopted by the same states as before. 897Rule Brazil 1998 only - Oct 11 0:00 1:00 S 898Rule Brazil 1999 only - Feb 21 0:00 0 - 899# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif> 900# (1999-08-23) adopted by same states. 901# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30) 902# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 903Rule Brazil 1999 only - Oct 3 0:00 1:00 S 904Rule Brazil 2000 only - Feb 27 0:00 0 - 905# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06) 906# adopted by the same states as before. 907# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13) 908# repeals DST in PE and RR, effective 2000-10-15 00:00. 909# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17) 910# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 911# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif> 912# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 913Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 914Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 915# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 916# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm> 917Rule Brazil 2002 only - Nov 3 0:00 1:00 S 918# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 919# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm> 920Rule Brazil 2003 only - Oct 19 0:00 1:00 S 921# Decree 5,223 (2004-10-01) reestablishes DST in MT. 922# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm> 923Rule Brazil 2004 only - Nov 2 0:00 1:00 S 924# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19), 925# adopted by the same states as before. 926Rule Brazil 2005 only - Oct 16 0:00 1:00 S 927# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03), 928# adopted by the same states as before. 929Rule Brazil 2006 only - Nov 5 0:00 1:00 S 930Rule Brazil 2007 only - Feb 25 0:00 0 - 931# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26), 932# adopted by the same states as before. 933Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S 934# From Frederico A. C. Neves (2008-09-10): 935# According to this decree 936# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm 937# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the 938# 3rd Feb Sunday. There is an exception on the return date when this is 939# the Carnival Sunday then the return date will be the next Sunday... 940Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S 941Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - 942Rule Brazil 2012 only - Feb Sun>=22 0:00 0 - 943Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - 944Rule Brazil 2015 only - Feb Sun>=22 0:00 0 - 945Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 - 946Rule Brazil 2023 only - Feb Sun>=22 0:00 0 - 947Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 - 948Rule Brazil 2026 only - Feb Sun>=22 0:00 0 - 949Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 - 950Rule Brazil 2034 only - Feb Sun>=22 0:00 0 - 951Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 - 952Rule Brazil 2037 only - Feb Sun>=22 0:00 0 - 953# From Arthur David Olson (2008-09-29): 954# The next is wrong in some years but is better than nothing. 955Rule Brazil 2038 max - Feb Sun>=15 0:00 0 - 956 957# The latest ruleset listed above says that the following states observe DST: 958# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 959 960# Zone NAME GMTOFF RULES FORMAT [UNTIL] 961# 962# Fernando de Noronha (administratively part of PE) 963Zone America/Noronha -2:09:40 - LMT 1914 964 -2:00 Brazil FN%sT 1990 Sep 17 965 -2:00 - FNT 1999 Sep 30 966 -2:00 Brazil FN%sT 2000 Oct 15 967 -2:00 - FNT 2001 Sep 13 968 -2:00 Brazil FN%sT 2002 Oct 1 969 -2:00 - FNT 970# Other Atlantic islands have no permanent settlement. 971# These include Trindade and Martim Vaz (administratively part of ES), 972# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). 973# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 974# it also included the Penedos. 975# 976# Amap�� (AP), east Par�� (PA) 977# East Par�� includes Bel��m, Marab��, Serra Norte, and S��o F��lix do Xingu. 978# The division between east and west Par�� is the river Xingu. 979# In the north a very small part from the river Javary (now Jari I guess, 980# the border with Amap��) to the Amazon, then to the Xingu. 981Zone America/Belem -3:13:56 - LMT 1914 982 -3:00 Brazil BR%sT 1988 Sep 12 983 -3:00 - BRT 984# 985# west Par�� (PA) 986# West Par�� includes Altamira, ��bidos, Prainha, Oriximin��, and Santar��m. 987Zone America/Santarem -3:38:48 - LMT 1914 988 -4:00 Brazil AM%sT 1988 Sep 12 989 -4:00 - AMT 2008 Jun 24 00:00 990 -3:00 - BRT 991# 992# Maranh��o (MA), Piau�� (PI), Cear�� (CE), Rio Grande do Norte (RN), 993# Para��ba (PB) 994Zone America/Fortaleza -2:34:00 - LMT 1914 995 -3:00 Brazil BR%sT 1990 Sep 17 996 -3:00 - BRT 1999 Sep 30 997 -3:00 Brazil BR%sT 2000 Oct 22 998 -3:00 - BRT 2001 Sep 13 999 -3:00 Brazil BR%sT 2002 Oct 1 1000 -3:00 - BRT 1001# 1002# Pernambuco (PE) (except Atlantic islands) 1003Zone America/Recife -2:19:36 - LMT 1914 1004 -3:00 Brazil BR%sT 1990 Sep 17 1005 -3:00 - BRT 1999 Sep 30 1006 -3:00 Brazil BR%sT 2000 Oct 15 1007 -3:00 - BRT 2001 Sep 13 1008 -3:00 Brazil BR%sT 2002 Oct 1 1009 -3:00 - BRT 1010# 1011# Tocantins (TO) 1012Zone America/Araguaina -3:12:48 - LMT 1914 1013 -3:00 Brazil BR%sT 1990 Sep 17 1014 -3:00 - BRT 1995 Sep 14 1015 -3:00 Brazil BR%sT 2003 Sep 24 1016 -3:00 - BRT 2012 Oct 21 1017 -3:00 Brazil BR%sT 2013 Sep 1018 -3:00 - BRT 1019# 1020# Alagoas (AL), Sergipe (SE) 1021Zone America/Maceio -2:22:52 - LMT 1914 1022 -3:00 Brazil BR%sT 1990 Sep 17 1023 -3:00 - BRT 1995 Oct 13 1024 -3:00 Brazil BR%sT 1996 Sep 4 1025 -3:00 - BRT 1999 Sep 30 1026 -3:00 Brazil BR%sT 2000 Oct 22 1027 -3:00 - BRT 2001 Sep 13 1028 -3:00 Brazil BR%sT 2002 Oct 1 1029 -3:00 - BRT 1030# 1031# Bahia (BA) 1032# There are too many Salvadors elsewhere, so use America/Bahia instead 1033# of America/Salvador. 1034Zone America/Bahia -2:34:04 - LMT 1914 1035 -3:00 Brazil BR%sT 2003 Sep 24 1036 -3:00 - BRT 2011 Oct 16 1037 -3:00 Brazil BR%sT 2012 Oct 21 1038 -3:00 - BRT 1039# 1040# Goi��s (GO), Distrito Federal (DF), Minas Gerais (MG), 1041# Esp��rito Santo (ES), Rio de Janeiro (RJ), S��o Paulo (SP), Paran�� (PR), 1042# Santa Catarina (SC), Rio Grande do Sul (RS) 1043Zone America/Sao_Paulo -3:06:28 - LMT 1914 1044 -3:00 Brazil BR%sT 1963 Oct 23 00:00 1045 -3:00 1:00 BRST 1964 1046 -3:00 Brazil BR%sT 1047# 1048# Mato Grosso do Sul (MS) 1049Zone America/Campo_Grande -3:38:28 - LMT 1914 1050 -4:00 Brazil AM%sT 1051# 1052# Mato Grosso (MT) 1053Zone America/Cuiaba -3:44:20 - LMT 1914 1054 -4:00 Brazil AM%sT 2003 Sep 24 1055 -4:00 - AMT 2004 Oct 1 1056 -4:00 Brazil AM%sT 1057# 1058# Rond��nia (RO) 1059Zone America/Porto_Velho -4:15:36 - LMT 1914 1060 -4:00 Brazil AM%sT 1988 Sep 12 1061 -4:00 - AMT 1062# 1063# Roraima (RR) 1064Zone America/Boa_Vista -4:02:40 - LMT 1914 1065 -4:00 Brazil AM%sT 1988 Sep 12 1066 -4:00 - AMT 1999 Sep 30 1067 -4:00 Brazil AM%sT 2000 Oct 15 1068 -4:00 - AMT 1069# 1070# east Amazonas (AM): Boca do Acre, Juta��, Manaus, Floriano Peixoto 1071# The great circle line from Tabatinga to Porto Acre divides 1072# east from west Amazonas. 1073Zone America/Manaus -4:00:04 - LMT 1914 1074 -4:00 Brazil AM%sT 1988 Sep 12 1075 -4:00 - AMT 1993 Sep 28 1076 -4:00 Brazil AM%sT 1994 Sep 22 1077 -4:00 - AMT 1078# 1079# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 1080# Eirunep��, Envira, Ipixuna 1081Zone America/Eirunepe -4:39:28 - LMT 1914 1082 -5:00 Brazil AC%sT 1988 Sep 12 1083 -5:00 - ACT 1993 Sep 28 1084 -5:00 Brazil AC%sT 1994 Sep 22 1085 -5:00 - ACT 2008 Jun 24 00:00 1086 -4:00 - AMT 2013 Nov 10 1087 -5:00 - ACT 1088# 1089# Acre (AC) 1090Zone America/Rio_Branco -4:31:12 - LMT 1914 1091 -5:00 Brazil AC%sT 1988 Sep 12 1092 -5:00 - ACT 2008 Jun 24 00:00 1093 -4:00 - AMT 2013 Nov 10 1094 -5:00 - ACT 1095 1096# Chile 1097 1098# From Eduardo Krell (1995-10-19): 1099# The law says to switch to DST at midnight [24:00] on the second SATURDAY 1100# of October.... The law is the same for March and October. 1101# (1998-09-29): 1102# Because of the drought this year, the government decided to go into 1103# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 1104# (unless there's another dry season next year, I guess). 1105 1106# From Julio I. Pacheco Troncoso (1999-03-18): 1107# Because of the same drought, the government decided to end DST later, 1108# on April 3, (one-time change). 1109 1110# From Oscar van Vlijmen (2006-10-08): 1111# http://www.horaoficial.cl/cambio.htm 1112 1113# From Jesper N��rgaard Welen (2006-10-08): 1114# I think that there are some obvious mistakes in the suggested link 1115# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4 1116# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15 1117# (they should have been 1990-09-15 and 1990-09-16 respectively), but 1118# anyhow it clears up some doubts too. 1119 1120# From Paul Eggert (2006-12-27): 1121# The following data for Chile and America/Santiago are from 1122# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by 1123# Jesper N��rgaard Welen. The data for Pacific/Easter are from Shanks 1124# & Pottenger, except with DST transitions after 1932 cloned from 1125# America/Santiago. The pre-1980 Pacific/Easter data are dubious, 1126# but we have no other source. 1127 1128# From Germ��n Poo-Caama��o (2008-03-03): 1129# Due to drought, Chile extends Daylight Time in three weeks. This 1130# is one-time change (Saturday 3/29 at 24:00 for America/Santiago 1131# and Saturday 3/29 at 22:00 for Pacific/Easter) 1132# The Supreme Decree is located at 1133# http://www.shoa.cl/servicios/supremo316.pdf 1134# and the instructions for 2008 are located in: 1135# http://www.horaoficial.cl/cambio.htm 1136 1137# From Jos�� Miguel Garrido (2008-03-05): 1138# ... 1139# You could see the announces of the change on 1140# http://www.shoa.cl/noticias/2008/04hora/hora.htm 1141 1142# From Angel Chiang (2010-03-04): 1143# Subject: DST in Chile exceptionally extended to 3 April due to earthquake 1144# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 1145# (in Spanish, last paragraph). 1146# 1147# This is breaking news. There should be more information available later. 1148 1149# From Arthur Daivd Olson (2010-03-06): 1150# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch. 1151 1152# From Glenn Eychaner (2011-03-02): [geychaner@mac.com] 1153# It appears that the Chilean government has decided to postpone the 1154# change from summer time to winter time again, by three weeks to April 1155# 2nd: 1156# http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651 1157# 1158# This is not yet reflected in the official "cambio de hora" site, but 1159# probably will be soon: 1160# http://www.horaoficial.cl/cambio.htm 1161 1162# From Arthur David Olson (2011-03-02): 1163# The emol.com article mentions a water shortage as the cause of the 1164# postponement, which may mean that it's not a permanent change. 1165 1166# From Glenn Eychaner (2011-03-28): 1167# The article: 1168# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} 1169# 1170# In English: 1171# Chile's clocks will go back an hour this year on the 7th of May instead 1172# of this Saturday. They will go forward again the 3rd Saturday in 1173# August, not in October as they have since 1968. This is a pilot plan 1174# which will be reevaluated in 2012. 1175 1176# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): 1177# As stated in the website of the Chilean Energy Ministry 1178# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html 1179# The Chilean Government has decided to postpone the entrance into winter time 1180# (to leave DST) from March 11 2012 to April 28th 2012. The decision has not 1181# been yet formalized but it will within the next days. 1182# Quote from the website communication: 1183# 1184# 6. For the year 2012, the dates of entry into winter time will be as follows: 1185# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at 1186# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 1187# of the same day. 1188# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, 1189# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be 1190# 01:00 on September 2. 1191 1192# From Steffen Thorsen (2013-02-15): 1193# According to several news sources, Chile has extended DST this year, 1194# they will end DST later and start DST earlier than planned. They 1195# hope to save energy. The new end date is 2013-04-28 00:00 and new 1196# start date is 2013-09-08 00:00.... 1197# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm 1198 1199# From Jos�� Miguel Garrido (2014-02-19): 1200# Today appeared in the Diario Oficial a decree amending the time change 1201# dates to 2014. 1202# DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC) 1203# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC) 1204# http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf 1205 1206# NOTE: ChileAQ rules for Antarctic bases are stored separately in the 1207# 'antarctica' file. 1208 1209# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1210Rule Chile 1927 1932 - Sep 1 0:00 1:00 S 1211Rule Chile 1928 1932 - Apr 1 0:00 0 - 1212Rule Chile 1942 only - Jun 1 4:00u 0 - 1213Rule Chile 1942 only - Aug 1 5:00u 1:00 S 1214Rule Chile 1946 only - Jul 15 4:00u 1:00 S 1215Rule Chile 1946 only - Sep 1 3:00u 0:00 - 1216Rule Chile 1947 only - Apr 1 4:00u 0 - 1217Rule Chile 1968 only - Nov 3 4:00u 1:00 S 1218Rule Chile 1969 only - Mar 30 3:00u 0 - 1219Rule Chile 1969 only - Nov 23 4:00u 1:00 S 1220Rule Chile 1970 only - Mar 29 3:00u 0 - 1221Rule Chile 1971 only - Mar 14 3:00u 0 - 1222Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S 1223Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 1224Rule Chile 1973 only - Sep 30 4:00u 1:00 S 1225Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S 1226Rule Chile 1987 only - Apr 12 3:00u 0 - 1227Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 - 1228Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S 1229Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S 1230Rule Chile 1990 only - Mar 18 3:00u 0 - 1231Rule Chile 1990 only - Sep 16 4:00u 1:00 S 1232Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 1233Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S 1234Rule Chile 1997 only - Mar 30 3:00u 0 - 1235Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - 1236Rule Chile 1998 only - Sep 27 4:00u 1:00 S 1237Rule Chile 1999 only - Apr 4 3:00u 0 - 1238Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S 1239Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - 1240# N.B.: the end of March 29 in Chile is March 30 in Universal time, 1241# which is used below in specifying the transition. 1242Rule Chile 2008 only - Mar 30 3:00u 0 - 1243Rule Chile 2009 only - Mar Sun>=9 3:00u 0 - 1244Rule Chile 2010 only - Apr Sun>=1 3:00u 0 - 1245Rule Chile 2011 only - May Sun>=2 3:00u 0 - 1246Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S 1247Rule Chile 2012 max - Apr Sun>=23 3:00u 0 - 1248Rule Chile 2012 max - Sep Sun>=2 4:00u 1:00 S 1249# IATA SSIM anomalies: (1992-02) says 1992-03-14; 1250# (1996-09) says 1998-03-08. Ignore these. 1251# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1252Zone America/Santiago -4:42:46 - LMT 1890 1253 -4:42:46 - SMT 1910 # Santiago Mean Time 1254 -5:00 - CLT 1916 Jul 1 # Chile Time 1255 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time 1256 -4:00 - CLT 1919 Jul 1 # Chile Time 1257 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time 1258 -5:00 Chile CL%sT 1947 May 22 # Chile Time 1259 -4:00 Chile CL%sT 1260Zone Pacific/Easter -7:17:44 - LMT 1890 1261 -7:17:28 - EMT 1932 Sep # Easter Mean Time 1262 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time 1263 -6:00 Chile EAS%sT 1264# 1265# Salas y G��mez Island is uninhabited. 1266# Other Chilean locations, including Juan Fern��ndez Is, Desventuradas Is, 1267# and Antarctic bases, are like America/Santiago. 1268 1269# Colombia 1270 1271# Milne gives 4:56:16.4 for Bogot�� time in 1899; round to nearest. He writes, 1272# "A variation of fifteen minutes in the public clocks of Bogota is not rare." 1273 1274# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1275Rule CO 1992 only - May 3 0:00 1:00 S 1276Rule CO 1993 only - Apr 4 0:00 0 - 1277# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1278Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 1279 -4:56:16 - BMT 1914 Nov 23 # Bogot�� Mean Time 1280 -5:00 CO CO%sT # Colombia Time 1281# Malpelo, Providencia, San Andres 1282# no information; probably like America/Bogota 1283 1284# Cura��ao 1285 1286# Milne gives 4:35:46.9 for Cura��ao mean time; round to nearest. 1287# 1288# From Paul Eggert (2006-03-22): 1289# Shanks & Pottenger say that The Bottom and Philipsburg have been at 1290# -4:00 since standard time was introduced on 1912-03-02; and that 1291# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from 1292# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say 1293# Saba Island has been like Cura��ao. 1294# This all predates our 1970 cutoff, though. 1295# 1296# By July 2007 Cura��ao and St Maarten are planned to become 1297# associated states within the Netherlands, much like Aruba; 1298# Bonaire, Saba and St Eustatius would become directly part of the 1299# Netherlands as Kingdom Islands. This won't affect their time zones 1300# though, as far as we know. 1301# 1302# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1303Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad 1304 -4:30 - ANT 1965 # Netherlands Antilles Time 1305 -4:00 - AST 1306 1307# From Arthur David Olson (2011-06-15): 1308# use links for places with new iso3166 codes. 1309# The name "Lower Prince's Quarter" is both longer than fourteen characters 1310# and contains an apostrophe; use "Lower_Princes" below. 1311 1312Link America/Curacao America/Lower_Princes # Sint Maarten 1313Link America/Curacao America/Kralendijk # Caribbean Netherlands 1314 1315# Ecuador 1316# 1317# Milne says the Central and South American Telegraph Company used -5:24:15. 1318# 1319# From Paul Eggert (2007-03-04): 1320# Apparently Ecuador had a failed experiment with DST in 1992. 1321# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and 1322# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both 1323# talk about "hora Sixto". Leave this alone for now, as we have no data. 1324# 1325# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1326Zone America/Guayaquil -5:19:20 - LMT 1890 1327 -5:14:00 - QMT 1931 # Quito Mean Time 1328 -5:00 - ECT # Ecuador Time 1329Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 1330 -5:00 - ECT 1986 1331 -6:00 - GALT # Gal��pagos Time 1332 1333# Falklands 1334 1335# From Paul Eggert (2006-03-22): 1336# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 1337# the IATA gives 1996-09-08. Go with Shanks & Pottenger. 1338 1339# From Falkland Islands Government Office, London (2001-01-22) 1340# via Jesper N��rgaard: 1341# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 1342# April 2001 and advance one hour to summer time at 2 am on Sunday 2 1343# September. It is anticipated that the clocks will revert back at 2 1344# am on Sunday 21 April 2002 and advance to summer time at 2 am on 1345# Sunday 1 September. 1346 1347# From Rives McDow (2001-02-13): 1348# 1349# I have communicated several times with people there, and the last 1350# time I had communications that was helpful was in 1998. Here is 1351# what was said then: 1352# 1353# "The general rule was that Stanley used daylight saving and the Camp 1354# did not. However for various reasons many people in the Camp have 1355# started to use daylight saving (known locally as 'Stanley Time') 1356# There is no rule as to who uses daylight saving - it is a matter of 1357# personal choice and so it is impossible to draw a map showing who 1358# uses it and who does not. Any list would be out of date as soon as 1359# it was produced. This year daylight saving ended on April 18/19th 1360# and started again on September 12/13th. I do not know what the rule 1361# is, but can find out if you like. We do not change at the same time 1362# as UK or Chile." 1363# 1364# I did have in my notes that the rule was "Second Saturday in Sep at 1365# 0:00 until third Saturday in Apr at 0:00". I think that this does 1366# not agree in some cases with Shanks; is this true? 1367# 1368# Also, there is no mention in the list that some areas in the 1369# Falklands do not use DST. I have found in my communications there 1370# that these areas are on the western half of East Falkland and all of 1371# West Falkland. Stanley is the only place that consistently observes 1372# DST. Again, as in other places in the world, the farmers don't like 1373# it. West Falkland is almost entirely sheep farmers. 1374# 1375# I know one lady there that keeps a list of which farm keeps DST and 1376# which doesn't each year. She runs a shop in Stanley, and says that 1377# the list changes each year. She uses it to communicate to her 1378# customers, catching them when they are home for lunch or dinner. 1379 1380# From Paul Eggert (2001-03-05): 1381# For now, we'll just record the time in Stanley, since we have no 1382# better info. 1383 1384# From Steffen Thorsen (2011-04-01): 1385# The Falkland Islands will not turn back clocks this winter, but stay on 1386# daylight saving time. 1387# 1388# One source: 1389# http://www.falklandnews.com/public/story.cfm?get=5914&source=3 1390# 1391# We have gotten this confirmed by a clerk of the legislative assembly: 1392# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the 1393# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 1394# hours) on the first Sunday of September at 0200hrs. 1395# 1396# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands 1397# will not revert to local mean time, but clocks will remain on Summer 1398# time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term 1399# change to local time following the trial period will be notified. 1400# 1401# From Andrew Newman (2012-02-24) 1402# A letter from Justin McPhee, Chief Executive, 1403# Cable & Wireless Falkland Islands (dated 2012-02-22) 1404# states... 1405# The current Atlantic/Stanley entry under South America expects the 1406# clocks to go back to standard Falklands Time (FKT) on the 15th April. 1407# The database entry states that in 2011 Stanley was staying on fixed 1408# summer time on a trial basis only. FIG need to contact IANA and/or 1409# the maintainers of the database to inform them we're adopting 1410# the same policy this year and suggest recommendations for future years. 1411# 1412# For now we will assume permanent summer time for the Falklands 1413# until advised differently (to apply for 2012 and beyond, after the 2011 1414# experiment was apparently successful.) 1415# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1416Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 1417Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 1418Rule Falk 1939 only - Oct 1 0:00 1:00 S 1419Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 1420Rule Falk 1943 only - Jan 1 0:00 0 - 1421Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 1422Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 1423Rule Falk 1984 only - Sep 16 0:00 1:00 S 1424Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 1425Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 1426Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 - 1427Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S 1428# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1429Zone Atlantic/Stanley -3:51:24 - LMT 1890 1430 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 1431 -4:00 Falk FK%sT 1983 May # Falkland Is Time 1432 -3:00 Falk FK%sT 1985 Sep 15 1433 -4:00 Falk FK%sT 2010 Sep 5 02:00 1434 -3:00 - FKST 1435 1436# French Guiana 1437# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1438Zone America/Cayenne -3:29:20 - LMT 1911 Jul 1439 -4:00 - GFT 1967 Oct # French Guiana Time 1440 -3:00 - GFT 1441 1442# Guyana 1443# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1444Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 1445 -3:45 - GBGT 1966 May 26 # Br Guiana Time 1446 -3:45 - GYT 1975 Jul 31 # Guyana Time 1447 -3:00 - GYT 1991 1448# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 1449 -4:00 - GYT 1450 1451# Paraguay 1452# 1453# From Paul Eggert (2006-03-22): 1454# Shanks & Pottenger say that spring transitions are 01:00 -> 02:00, 1455# and autumn transitions are 00:00 -> 23:00. Go with pre-1999 1456# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 1457# 1458# From Waldemar Villamayor-Venialbo (2013-09-20): 1459# No time of the day is established for the adjustment, so people normally 1460# adjust their clocks at 0 hour of the given dates. 1461# 1462# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1463Rule Para 1975 1988 - Oct 1 0:00 1:00 S 1464Rule Para 1975 1978 - Mar 1 0:00 0 - 1465Rule Para 1979 1991 - Apr 1 0:00 0 - 1466Rule Para 1989 only - Oct 22 0:00 1:00 S 1467Rule Para 1990 only - Oct 1 0:00 1:00 S 1468Rule Para 1991 only - Oct 6 0:00 1:00 S 1469Rule Para 1992 only - Mar 1 0:00 0 - 1470Rule Para 1992 only - Oct 5 0:00 1:00 S 1471Rule Para 1993 only - Mar 31 0:00 0 - 1472Rule Para 1993 1995 - Oct 1 0:00 1:00 S 1473Rule Para 1994 1995 - Feb lastSun 0:00 0 - 1474Rule Para 1996 only - Mar 1 0:00 0 - 1475# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 1476# From Steffen Thorsen (2000-10-02): 1477# I have three independent reports that Paraguay changed to DST this Sunday 1478# (10-01). 1479# 1480# Translated by Gwillim Law (2001-02-27) from 1481# Noticias, a daily paper in Asunci��n, Paraguay (2000-10-01) 1482# <http://www.diarionoticias.com.py/011000/nacional/naciona1.htm>: 1483# Starting at 0:00 today, the clock will be set forward 60 minutes, in 1484# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 1485# system has been operating for several years. Formerly there was a separate 1486# decree each year; the new law has the same effect, but permanently. Every 1487# year, the time will change on the first Sunday of October; likewise, the 1488# clock will be set back on the first Sunday of March. 1489# 1490Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 1491# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 1492Rule Para 1997 only - Feb lastSun 0:00 0 - 1493# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 1494# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 1495Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 1496# From Rives McDow (2002-02-28): 1497# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 1498# dst method to be from the first Sunday in September to the first Sunday in 1499# April. 1500Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 1501Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 1502# 1503# From Jesper N��rgaard Welen (2005-01-02): 1504# There are several sources that claim that Paraguay made 1505# a timezone rule change in autumn 2004. 1506# From Steffen Thorsen (2005-01-05): 1507# Decree 1,867 (2004-03-05) 1508# From Carlos Ra��l Perasso via Jesper N��rgaard Welen (2006-10-13) 1509# <http://www.presidencia.gov.py/decretos/D1867.pdf> 1510Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S 1511Rule Para 2005 2009 - Mar Sun>=8 0:00 0 - 1512# From Carlos Ra��l Perasso (2010-02-18): 1513# By decree number 3958 issued yesterday 1514# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf 1515# Paraguay changes its DST schedule, postponing the March rule to April and 1516# modifying the October date. The decree reads: 1517# ... 1518# Art. 1. It is hereby established that from the second Sunday of the month of 1519# April of this year (2010), the official time is to be set back 60 minutes, 1520# and that on the first Sunday of the month of October, it is to be set 1521# forward 60 minutes, in all the territory of the Paraguayan Republic. 1522# ... 1523Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S 1524Rule Para 2010 2012 - Apr Sun>=8 0:00 0 - 1525# 1526# From Steffen Thorsen (2013-03-07): 1527# Paraguay will end DST on 2013-03-24 00:00.... 1528# http://www.ande.gov.py/interna.php?id=1075 1529# 1530# From Carlos Ra��l Perasso (2013-03-15): 1531# The change in Paraguay is now final. Decree number 10780 1532# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf 1533# From Carlos Ra��l Perasso (2014-02-28): 1534# Decree 1264 can be found at: 1535# http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf 1536Rule Para 2013 max - Mar Sun>=22 0:00 0 - 1537 1538# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1539Zone America/Asuncion -3:50:40 - LMT 1890 1540 -3:50:40 - AMT 1931 Oct 10 # Asunci��n Mean Time 1541 -4:00 - PYT 1972 Oct # Paraguay Time 1542 -3:00 - PYT 1974 Apr 1543 -4:00 Para PY%sT 1544 1545# Peru 1546# 1547# From Evelyn C. Leeper via Mark Brader (2003-10-26) 1548# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>: 1549# When we were in Peru in 1985-1986, they apparently switched over 1550# sometime between December 29 and January 3 while we were on the Amazon. 1551# 1552# From Paul Eggert (2006-03-22): 1553# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 1554 1555# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1556Rule Peru 1938 only - Jan 1 0:00 1:00 S 1557Rule Peru 1938 only - Apr 1 0:00 0 - 1558Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 1559Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 1560Rule Peru 1986 1987 - Jan 1 0:00 1:00 S 1561Rule Peru 1986 1987 - Apr 1 0:00 0 - 1562Rule Peru 1990 only - Jan 1 0:00 1:00 S 1563Rule Peru 1990 only - Apr 1 0:00 0 - 1564# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 1565Rule Peru 1994 only - Jan 1 0:00 1:00 S 1566Rule Peru 1994 only - Apr 1 0:00 0 - 1567# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1568Zone America/Lima -5:08:12 - LMT 1890 1569 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 1570 -5:00 Peru PE%sT # Peru Time 1571 1572# South Georgia 1573# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1574Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 1575 -2:00 - GST # South Georgia Time 1576 1577# South Sandwich Is 1578# uninhabited; scientific personnel have wintered 1579 1580# Suriname 1581# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1582Zone America/Paramaribo -3:40:40 - LMT 1911 1583 -3:40:52 - PMT 1935 # Paramaribo Mean Time 1584 -3:40:36 - PMT 1945 Oct # The capital moved? 1585 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 1586 -3:30 - SRT 1984 Oct # Suriname Time 1587 -3:00 - SRT 1588 1589# Trinidad and Tobago 1590# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1591Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 1592 -4:00 - AST 1593 1594# These all agree with Trinidad and Tobago since 1970. 1595Link America/Port_of_Spain America/Anguilla 1596Link America/Port_of_Spain America/Dominica 1597Link America/Port_of_Spain America/Grenada 1598Link America/Port_of_Spain America/Guadeloupe 1599Link America/Port_of_Spain America/Marigot # St Martin (French part) 1600Link America/Port_of_Spain America/Montserrat 1601Link America/Port_of_Spain America/St_Barthelemy # St Barth��lemy 1602Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis 1603Link America/Port_of_Spain America/St_Lucia 1604Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US) 1605Link America/Port_of_Spain America/St_Vincent 1606Link America/Port_of_Spain America/Tortola # Virgin Islands (UK) 1607 1608# Uruguay 1609# From Paul Eggert (1993-11-18): 1610# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1611# From Shanks & Pottenger: 1612# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1613# Whitman gives 1923 Oct 1; go with Shanks & Pottenger. 1614Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 1615Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1616Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 1617Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1618# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman. 1619Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 1620Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 1621Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1622# Whitman gives 1937 Oct 3; go with Shanks & Pottenger. 1623Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 1624# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1625# and 1943 Apr 13 "to present time"; go with Shanks & Pottenger. 1626Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS 1627Rule Uruguay 1942 only - Jan 1 0:00 0 - 1628Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 1629Rule Uruguay 1943 only - Mar 14 0:00 0 - 1630Rule Uruguay 1959 only - May 24 0:00 1:00 S 1631Rule Uruguay 1959 only - Nov 15 0:00 0 - 1632Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 1633Rule Uruguay 1960 only - Mar 6 0:00 0 - 1634Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 1635Rule Uruguay 1965 only - Sep 26 0:00 0 - 1636Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 1637Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 1638Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 1639Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 1640Rule Uruguay 1972 only - Aug 15 0:00 0 - 1641Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 1642Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 1643Rule Uruguay 1976 only - Oct 1 0:00 0 - 1644Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 1645Rule Uruguay 1978 only - Apr 1 0:00 0 - 1646Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 1647Rule Uruguay 1980 only - May 1 0:00 0 - 1648Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 1649Rule Uruguay 1988 only - Mar 14 0:00 0 - 1650Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 1651Rule Uruguay 1989 only - Mar 12 0:00 0 - 1652Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 1653# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2, 1654# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 1655Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 1656Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 1657Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 1658Rule Uruguay 1993 only - Feb 28 0:00 0 - 1659# From Eduardo Cota (2004-09-20): 1660# The uruguayan government has decreed a change in the local time.... 1661# http://www.presidencia.gub.uy/decretos/2004091502.htm 1662Rule Uruguay 2004 only - Sep 19 0:00 1:00 S 1663# From Steffen Thorsen (2005-03-11): 1664# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1665# save energy ... it was postponed two weeks.... 1666# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1667Rule Uruguay 2005 only - Mar 27 2:00 0 - 1668# From Eduardo Cota (2005-09-27): 1669# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1670# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1671# 02:00 local time, official time in Uruguay will be at GMT -2. 1672Rule Uruguay 2005 only - Oct 9 2:00 1:00 S 1673Rule Uruguay 2006 only - Mar 12 2:00 0 - 1674# From Jesper N��rgaard Welen (2006-09-06): 1675# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF 1676Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S 1677Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 - 1678# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1679Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 1680 -3:44:44 - MMT 1920 May 1 # Montevideo MT 1681 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 1682 -3:00 Uruguay UY%sT 1683 1684# Venezuela 1685# 1686# From John Stainforth (2007-11-28): 1687# ... the change for Venezuela originally expected for 2007-12-31 has 1688# been brought forward to 2007-12-09. The official announcement was 1689# published today in the "Gaceta Oficial de la Rep��blica Bolivariana 1690# de Venezuela, n��mero 38.819" (official document for all laws or 1691# resolution publication) 1692# http://www.globovision.com/news.php?nid=72208 1693 1694# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1695Zone America/Caracas -4:27:44 - LMT 1890 1696 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 1697 -4:30 - VET 1965 # Venezuela Time 1698 -4:00 - VET 2007 Dec 9 03:00 1699 -4:30 - VET 1700
