1# This file is in the public domain, so clarified as of 2# 2009-05-17 by Arthur David Olson. 3 4# This file 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). For more, please see 7# the file CONTRIBUTING in the tz distribution. 8 9# From Paul Eggert (2014-10-31): 10# 11# Unless otherwise specified, the source for data through 1990 is: 12# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 13# San Diego: ACS Publications, Inc. (2003). 14# Unfortunately this book contains many errors and cites no sources. 15# 16# Gwillim Law writes that a good source 17# for recent time zone data is the International Air Transport 18# Association's Standard Schedules Information Manual (IATA SSIM), 19# published semiannually. Law sent in several helpful summaries 20# of the IATA's data after 1990. Except where otherwise noted, 21# IATA SSIM is the source for entries after 1990. 22# 23# For data circa 1899, a common source is: 24# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94. 25# http://www.jstor.org/stable/1774359 26# 27# Earlier editions of these tables used the North American style (e.g. ARST and 28# ARDT for Argentine Standard and Daylight Time), but the following quote 29# suggests that it's better to use European style (e.g. ART and ARST). 30# I suggest the use of _Summer time_ instead of the more cumbersome 31# _daylight-saving time_. _Summer time_ seems to be in general use 32# in Europe and South America. 33# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 34# H L Mencken, _The American Language: Supplement I_ (1960), p 466 35# 36# Earlier editions of these tables also used the North American style 37# for time zones in Brazil, but this was incorrect, as Brazilians say 38# "summer time". Reinaldo Goulart, a São Paulo businessman active in 39# the railroad sector, writes (1999-07-06): 40# The subject of time zones is currently a matter of discussion/debate in 41# Brazil. Let's say that "the Brasília time" is considered the 42# "official time" because Brasília is the capital city. 43# The other three time zones are called "Brasília time "minus one" or 44# "plus one" or "plus two". As far as I know there is no such 45# name/designation as "Eastern Time" or "Central Time". 46# So I invented the following (English-language) abbreviations for now. 47# Corrections are welcome! 48# std dst 49# -2:00 FNT FNST Fernando de Noronha 50# -3:00 BRT BRST Brasília 51# -4:00 AMT AMST Amazon 52# -5:00 ACT ACST Acre 53 54############################################################################### 55 56############################################################################### 57 58# Argentina 59 60# From Bob Devine (1988-01-28): 61# Argentina: first Sunday in October to first Sunday in April since 1976. 62# Double Summer time from 1969 to 1974. Switches at midnight. 63 64# From U. S. Naval Observatory (1988-01-19): 65# ARGENTINA 3 H BEHIND UTC 66 67# From Hernan G. Otero (1995-06-26): 68# I am sending modifications to the Argentine time zone table... 69# AR was chosen because they are the ISO letters that represent Argentina. 70 71# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 72Rule Arg 1930 only - Dec 1 0:00 1:00 S 73Rule Arg 1931 only - Apr 1 0:00 0 - 74Rule Arg 1931 only - Oct 15 0:00 1:00 S 75Rule Arg 1932 1940 - Mar 1 0:00 0 - 76Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 77Rule Arg 1940 only - Jul 1 0:00 1:00 S 78Rule Arg 1941 only - Jun 15 0:00 0 - 79Rule Arg 1941 only - Oct 15 0:00 1:00 S 80Rule Arg 1943 only - Aug 1 0:00 0 - 81Rule Arg 1943 only - Oct 15 0:00 1:00 S 82Rule Arg 1946 only - Mar 1 0:00 0 - 83Rule Arg 1946 only - Oct 1 0:00 1:00 S 84Rule Arg 1963 only - Oct 1 0:00 0 - 85Rule Arg 1963 only - Dec 15 0:00 1:00 S 86Rule Arg 1964 1966 - Mar 1 0:00 0 - 87Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 88Rule Arg 1967 only - Apr 2 0:00 0 - 89Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 90Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 91Rule Arg 1974 only - Jan 23 0:00 1:00 S 92Rule Arg 1974 only - May 1 0:00 0 - 93Rule Arg 1988 only - Dec 1 0:00 1:00 S 94# 95# From Hernan G. Otero (1995-06-26): 96# These corrections were contributed by InterSoft Argentina S.A., 97# obtaining the data from the: 98# Talleres de Hidrografía Naval Argentina 99# (Argentine Naval Hydrography Institute) 100Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 101Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 102# 103# From Hernan G. Otero (1995-06-26): 104# From this moment on, the law that mandated the daylight saving 105# time corrections was derogated and no more modifications 106# to the time zones (for daylight saving) are now made. 107# 108# From Rives McDow (2000-01-10): 109# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 110# which did not result in the switch of a time zone, as they stayed 9 hours 111# from the International Date Line. 112Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 113# From Paul Eggert (2007-12-28): 114# DST was set to expire on March 5, not March 3, but since it was converted 115# to standard time on March 3 it's more convenient for us to pretend that 116# it ended on March 3. 117Rule Arg 2000 only - Mar 3 0:00 0 - 118# 119# From Peter Gradelski via Steffen Thorsen (2000-03-01): 120# We just checked with our São Paulo office and they say the government of 121# Argentina decided not to become one of the countries that go on or off DST. 122# So Buenos Aires should be -3 hours from GMT at all times. 123# 124# From Fabián L. Arce Jofré (2000-04-04): 125# The law that claimed DST for Argentina was derogated by President Fernando 126# de la Rúa on March 2, 2000, because it would make people spend more energy 127# in the winter time, rather than less. The change took effect on March 3. 128# 129# From Mariano Absatz (2001-06-06): 130# one of the major newspapers here in Argentina said that the 1999 131# Timezone Law (which never was effectively applied) will (would?) be 132# in effect.... The article is at 133# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 134# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 135# 1999-09-17, and published 1999-09-21. The official publication is at: 136# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 137# Regretfully, you have to subscribe (and pay) for the on-line version.... 138# 139# (2001-06-12): 140# the timezone for Argentina will not change next Sunday. 141# Apparently it will do so on Sunday 24th.... 142# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 143# 144# (2001-06-25): 145# Last Friday (yes, the last working day before the date of the change), the 146# Senate annulled the 1999 law that introduced the changes later postponed. 147# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 148# It remains the vote of the Deputies..., but it will be the same.... 149# This kind of things had always been done this way in Argentina. 150# We are still -03:00 all year round in all of the country. 151# 152# From Steffen Thorsen (2007-12-21): 153# A user (Leonardo Chaim) reported that Argentina will adopt DST.... 154# all of the country (all Zone-entries) are affected. News reports like 155# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate 156# that Argentina will use DST next year as well, from October to 157# March, although exact rules are not given. 158# 159# From Jesper Nørgaard Welen (2007-12-26) 160# The last hurdle of Argentina DST is over, the proposal was approved in 161# the lower chamber too (Diputados) with a vote 192 for and 2 against. 162# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to 163# the original scanned proposal, where the dates and the zero hours are 164# clear and unambiguous...This is the article about final approval: 165# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 166# 167# From Paul Eggert (2007-12-22): 168# For dates after mid-2008, the following rules are my guesses and 169# are quite possibly wrong, but are more likely than no DST at all. 170 171# From Alexander Krivenyshev (2008-09-05): 172# As per message from Carlos Alberto Fonseca Arauz (Nicaragua), 173# Argentina will start DST on Sunday October 19, 2008. 174# 175# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html 176# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) 177 178# From Rodrigo Severo (2008-10-06): 179# Here is some info available at a Gentoo bug related to TZ on Argentina's DST: 180# ... 181# ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 ------- 182# Hi, there is a problem with timezone-data-2008e and maybe with 183# timezone-data-2008f 184# Argentinian law [Number] 25.155 is no longer valid. 185# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm 186# The new one is law [Number] 26.350 187# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm 188# So there is no summer time in Argentina for now. 189 190# From Mariano Absatz (2008-10-20): 191# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST 192# in Argentina from 2008-10-19 until 2009-03-15. 193# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 194# 195 196# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 197# 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La 198# Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego 199# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 200# 201# Press release 235 dated Saturday October 18th, from the Government of the 202# Province of Jujuy saying it will not apply DST either (even when it was not 203# included in Decree 1705/2008). 204# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc 205 206# From fullinet (2009-10-18): 207# As announced in 208# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 209# (an official .gob.ar) under title: "Sin Cambio de Hora" 210# (English: "No hour change"). 211# 212# "Por el momento, el Gobierno Nacional resolvió no modificar la hora 213# oficial, decisión que estaba en estudio para su implementación el 214# domingo 18 de octubre. Desde el Ministerio de Planificación se anunció 215# que la Argentina hoy, en estas condiciones meteorológicas, no necesita 216# la modificación del huso horario, ya que 2009 nos encuentra con 217# crecimiento en la producción y distribución energética." 218 219Rule Arg 2007 only - Dec 30 0:00 1:00 S 220Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 - 221Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S 222 223# From Mariano Absatz (2004-05-21): 224# Today it was officially published that the Province of Mendoza is changing 225# its timezone this winter... starting tomorrow night.... 226# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 227# From Paul Eggert (2004-05-24): 228# It's Law No. 7,210. This change is due to a public power emergency, so for 229# now we'll assume it's for this year only. 230# 231# From Paul Eggert (2014-08-09): 232# Hora de verano para la República Argentina 233# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html 234# says that standard time in Argentina from 1894-10-31 235# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 236# over Shanks & Pottenger. 237# 238# From Mariano Absatz (2004-06-05): 239# These media articles from a major newspaper mostly cover the current state: 240# http://www.lanacion.com.ar/04/05/27/de_604825.asp 241# http://www.lanacion.com.ar/04/05/28/de_605203.asp 242# 243# The following eight (8) provinces pulled clocks back to UTC-04:00 at 244# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 245# Apparently, all nine provinces would go back to UTC-03:00 at the same 246# time in October 17th. 247# 248# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 249# Tierra del Fuego, Tucumán. 250# 251# From Mariano Absatz (2004-06-14): 252# ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00 253# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 254# annoyance with the change is much higher than the power savings obtained.... 255# 256# From Gwillim Law (2004-06-14): 257# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 258# "The time change in Tierra del Fuego was a conflicted decision from 259# the start. The government had decreed that the measure would take 260# effect on June 1, but a normative error forced the new time to begin 261# three days earlier, from a Saturday to a Sunday.... 262# Our understanding was that the change was originally scheduled to take place 263# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 264# provinces). Sunday was May 30, only two days earlier. So the article 265# contains a contradiction. I would give more credence to the Saturday/Sunday 266# date than the "three days earlier" phrase, and conclude that Tierra del 267# Fuego set its clocks back at 2004-05-30 00:00. 268# 269# From Steffen Thorsen (2004-10-05): 270# The previous law 7210 which changed the province of Mendoza's time zone 271# back in May have been modified slightly in a new law 7277, which set the 272# new end date to 2004-09-26 (original date was 2004-10-17). 273# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 274# 275# From Mariano Absatz (2004-10-05): 276# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 277# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 278# at midnight between Saturday, July 24th and Sunday, July 25th.... 279# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 280# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 281# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 282 283# From Alex Krivenyshev (2008-01-17): 284# Here are articles that Argentina Province San Luis is planning to end DST 285# as earlier as upcoming Monday January 21, 2008 or February 2008: 286# 287# Provincia argentina retrasa reloj y marca diferencia con resto del país 288# (Argentine Province delayed clock and mark difference with the rest of the 289# country) 290# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel 291# 292# Es inminente que en San Luis atrasen una hora los relojes 293# (It is imminent in San Luis clocks one hour delay) 294# http://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html 295# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html 296 297# From Jesper Nørgaard Welen (2008-01-18): 298# The page of the San Luis provincial government 299# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 300# confirms what Alex Krivenyshev has earlier sent to the tz 301# emailing list about that San Luis plans to return to standard 302# time much earlier than the rest of the country. It also 303# confirms that upon request the provinces San Juan and Mendoza 304# refused to follow San Luis in this change. 305# 306# The change is supposed to take place Monday the 21st at 0:00 307# hours. As far as I understand it if this goes ahead, we need 308# a new timezone for San Luis (although there are also documented 309# independent changes in the southamerica file of San Luis in 310# 1990 and 1991 which has not been confirmed). 311 312# From Jesper Nørgaard Welen (2008-01-25): 313# Unfortunately the below page has become defunct, about the San Luis 314# time change. Perhaps because it now is part of a group of pages "Most 315# important pages of 2008." 316# 317# You can use 318# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 319# instead it seems. Or use "Buscador" from the main page of the San Luis 320# government, and fill in "huso" and click OK, and you will get 3 pages 321# from which the first one is identical to the above. 322 323# From Mariano Absatz (2008-01-28): 324# I can confirm that the Province of San Luis (and so far only that 325# province) decided to go back to UTC-3 effective midnight Jan 20th 2008 326# (that is, Monday 21st at 0:00 is the time the clocks were delayed back 327# 1 hour), and they intend to keep UTC-3 as their timezone all year round 328# (that is, unless they change their mind any minute now). 329# 330# So we'll have to add yet another city to 'southamerica' (I think San 331# Luis city is the mos populated city in the Province, so it'd be 332# America/Argentina/San_Luis... of course I can't remember if San Luis's 333# history of particular changes goes along with Mendoza or San Juan :-( 334# (I only remember not being able to collect hard facts about San Luis 335# back in 2004, when these provinces changed to UTC-4 for a few days, I 336# mailed them personally and never got an answer). 337 338# From Paul Eggert (2014-08-12): 339# Unless otherwise specified, data entries are from Shanks & Pottenger through 340# 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that 341# America/Cordoba split into 6 subregions during 1991/1992, one of which 342# was America/San_Luis, but we haven't verified this yet so for now we'll 343# keep America/Cordoba a single region rather than splitting it into the 344# other 5 subregions. 345 346# From Mariano Absatz (2009-03-13): 347# Yesterday (with our usual 2-day notice) the Province of San Luis 348# decided that next Sunday instead of "staying" @utc-03:00 they will go 349# to utc-04:00 until the second Saturday in October... 350# 351# The press release is at 352# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 353# (I couldn't find the decree, but www.sanluis.gov.ar 354# is the official page for the Province Government.) 355# 356# There's also a note in only one of the major national papers ... 357# http://www.lanacion.com.ar/nota.asp?nota_id=1107912 358# 359# The press release says [quick and dirty translation]: 360# ... announced that next Sunday, at 00:00, Puntanos (the San Luis 361# inhabitants) will have to turn back one hour their clocks 362# 363# Since then, San Luis will establish its own Province timezone. Thus, 364# during 2009, this timezone change will run from 00:00 the third Sunday 365# in March until 24:00 of the second Saturday in October. 366 367# From Mariano Absatz (2009-10-16): 368# ...the Province of San Luis is a case in itself. 369# 370# The Law at 371# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276 372# is ambiguous because establishes a calendar from the 2nd Sunday in 373# October at 0:00 thru the 2nd Saturday in March at 24:00 and the 374# complement of that starting on the 2nd Sunday of March at 0:00 and 375# ending on the 2nd Saturday of March at 24:00. 376# 377# This clearly breaks every time the 1st of March or October is a Sunday. 378# 379# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd 380# Sunday of October and March. 381# 382# The problem is that the changes in the rest of the Provinces that did 383# change in 2007/2008, were made according to the Federal Law and Decrees 384# that did so on the 3rd Sunday of October and March. 385# 386# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday 387# (October 11th) at 0:00. 388# 389# So I guess a new set of rules, besides "Arg", must be made and the last 390# America/Argentina/San_Luis entries should change to use these... 391# 392# I'm enclosing a patch that does what I say... regretfully, the San Luis 393# timezone must be called "WART/WARST" even when most of the time (like, 394# right now) WARST == ART... that is, since last Sunday, all the country 395# is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest 396# of the country calls it "ART". 397# ... 398 399# From Alexander Krivenyshev (2010-04-09): 400# According to news reports from El Diario de la República Province San 401# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time 402# after April 11, 2010 - will continue to have same time as rest of 403# Argentina (UTC-3) (no DST). 404# 405# Confirmaron la prórroga del huso horario de verano (Spanish) 406# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 407# or (some English translation): 408# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html 409 410# From Mariano Absatz (2010-04-12): 411# yes...I can confirm this...and given that San Luis keeps calling 412# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" 413# rules...San Luis is still using "Western ARgentina Time" and it got 414# stuck on Summer daylight savings time even though the summer is over. 415 416# From Paul Eggert (2013-09-05): 417# Perhaps San Luis operates on the legal fiction that it is at UTC-4 418# with perpetual summer time, but ordinary usage typically seems to 419# just say it's at UTC-3; see, for example, 420# http://es.wikipedia.org/wiki/Hora_oficial_argentina 421# We've documented similar situations as being plain changes to 422# standard time, so let's do that here too. This does not change UTC 423# offsets, only tm_isdst and the time zone abbreviations. One minor 424# plus is that this silences a zic complaint that there's no POSIX TZ 425# setting for time stamps past 2038. 426 427# From Paul Eggert (2013-02-21): 428# Milne says Córdoba time was -4:16:48.2. Round to the nearest second. 429 430# Zone NAME GMTOFF RULES FORMAT [UNTIL] 431# 432# Buenos Aires (BA), Capital Federal (CF), 433Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 434 -4:16:48 - CMT 1920 May # Córdoba Mean Time 435 -4:00 - ART 1930 Dec 436 -4:00 Arg AR%sT 1969 Oct 5 437 -3:00 Arg AR%sT 1999 Oct 3 438 -4:00 Arg AR%sT 2000 Mar 3 439 -3:00 Arg AR%sT 440# 441# Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN), 442# Chaco (CC), Formosa (FM), Santiago del Estero (SE) 443# 444# Shanks & Pottenger also make the following claims, which we haven't verified: 445# - Formosa switched to -3:00 on 1991-01-07. 446# - Misiones switched to -3:00 on 1990-12-29. 447# - Chaco switched to -3:00 on 1991-01-04. 448# - Santiago del Estero switched to -4:00 on 1991-04-01, 449# then to -3:00 on 1991-04-26. 450# 451Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 452 -4:16:48 - CMT 1920 May 453 -4:00 - ART 1930 Dec 454 -4:00 Arg AR%sT 1969 Oct 5 455 -3:00 Arg AR%sT 1991 Mar 3 456 -4:00 - WART 1991 Oct 20 457 -3:00 Arg AR%sT 1999 Oct 3 458 -4:00 Arg AR%sT 2000 Mar 3 459 -3:00 Arg AR%sT 460# 461# Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN) 462Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 463 -4:16:48 - CMT 1920 May 464 -4:00 - ART 1930 Dec 465 -4:00 Arg AR%sT 1969 Oct 5 466 -3:00 Arg AR%sT 1991 Mar 3 467 -4:00 - WART 1991 Oct 20 468 -3:00 Arg AR%sT 1999 Oct 3 469 -4:00 Arg AR%sT 2000 Mar 3 470 -3:00 Arg AR%sT 2008 Oct 18 471 -3:00 - ART 472# 473# Tucumán (TM) 474Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 475 -4:16:48 - CMT 1920 May 476 -4:00 - ART 1930 Dec 477 -4:00 Arg AR%sT 1969 Oct 5 478 -3:00 Arg AR%sT 1991 Mar 3 479 -4:00 - WART 1991 Oct 20 480 -3:00 Arg AR%sT 1999 Oct 3 481 -4:00 Arg AR%sT 2000 Mar 3 482 -3:00 - ART 2004 Jun 1 483 -4:00 - WART 2004 Jun 13 484 -3:00 Arg AR%sT 485# 486# La Rioja (LR) 487Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 488 -4:16:48 - CMT 1920 May 489 -4:00 - ART 1930 Dec 490 -4:00 Arg AR%sT 1969 Oct 5 491 -3:00 Arg AR%sT 1991 Mar 1 492 -4:00 - WART 1991 May 7 493 -3:00 Arg AR%sT 1999 Oct 3 494 -4:00 Arg AR%sT 2000 Mar 3 495 -3:00 - ART 2004 Jun 1 496 -4:00 - WART 2004 Jun 20 497 -3:00 Arg AR%sT 2008 Oct 18 498 -3:00 - ART 499# 500# San Juan (SJ) 501Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 502 -4:16:48 - CMT 1920 May 503 -4:00 - ART 1930 Dec 504 -4:00 Arg AR%sT 1969 Oct 5 505 -3:00 Arg AR%sT 1991 Mar 1 506 -4:00 - WART 1991 May 7 507 -3:00 Arg AR%sT 1999 Oct 3 508 -4:00 Arg AR%sT 2000 Mar 3 509 -3:00 - ART 2004 May 31 510 -4:00 - WART 2004 Jul 25 511 -3:00 Arg AR%sT 2008 Oct 18 512 -3:00 - ART 513# 514# Jujuy (JY) 515Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 516 -4:16:48 - CMT 1920 May 517 -4:00 - ART 1930 Dec 518 -4:00 Arg AR%sT 1969 Oct 5 519 -3:00 Arg AR%sT 1990 Mar 4 520 -4:00 - WART 1990 Oct 28 521 -4:00 1:00 WARST 1991 Mar 17 522 -4:00 - WART 1991 Oct 6 523 -3:00 1:00 ARST 1992 524 -3:00 Arg AR%sT 1999 Oct 3 525 -4:00 Arg AR%sT 2000 Mar 3 526 -3:00 Arg AR%sT 2008 Oct 18 527 -3:00 - ART 528# 529# Catamarca (CT), Chubut (CH) 530Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 531 -4:16:48 - CMT 1920 May 532 -4:00 - ART 1930 Dec 533 -4:00 Arg AR%sT 1969 Oct 5 534 -3:00 Arg AR%sT 1991 Mar 3 535 -4:00 - WART 1991 Oct 20 536 -3:00 Arg AR%sT 1999 Oct 3 537 -4:00 Arg AR%sT 2000 Mar 3 538 -3:00 - ART 2004 Jun 1 539 -4:00 - WART 2004 Jun 20 540 -3:00 Arg AR%sT 2008 Oct 18 541 -3:00 - ART 542# 543# Mendoza (MZ) 544Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 545 -4:16:48 - CMT 1920 May 546 -4:00 - ART 1930 Dec 547 -4:00 Arg AR%sT 1969 Oct 5 548 -3:00 Arg AR%sT 1990 Mar 4 549 -4:00 - WART 1990 Oct 15 550 -4:00 1:00 WARST 1991 Mar 1 551 -4:00 - WART 1991 Oct 15 552 -4:00 1:00 WARST 1992 Mar 1 553 -4:00 - WART 1992 Oct 18 554 -3:00 Arg AR%sT 1999 Oct 3 555 -4:00 Arg AR%sT 2000 Mar 3 556 -3:00 - ART 2004 May 23 557 -4:00 - WART 2004 Sep 26 558 -3:00 Arg AR%sT 2008 Oct 18 559 -3:00 - ART 560# 561# San Luis (SL) 562 563Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - 564Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S 565 566Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 567 -4:16:48 - CMT 1920 May 568 -4:00 - ART 1930 Dec 569 -4:00 Arg AR%sT 1969 Oct 5 570 -3:00 Arg AR%sT 1990 571 -3:00 1:00 ARST 1990 Mar 14 572 -4:00 - WART 1990 Oct 15 573 -4:00 1:00 WARST 1991 Mar 1 574 -4:00 - WART 1991 Jun 1 575 -3:00 - ART 1999 Oct 3 576 -4:00 1:00 WARST 2000 Mar 3 577 -3:00 - ART 2004 May 31 578 -4:00 - WART 2004 Jul 25 579 -3:00 Arg AR%sT 2008 Jan 21 580 -4:00 SanLuis WAR%sT 2009 Oct 11 581 -3:00 - ART 582# 583# Santa Cruz (SC) 584Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 585 -4:16:48 - CMT 1920 May # Córdoba Mean Time 586 -4:00 - ART 1930 Dec 587 -4:00 Arg AR%sT 1969 Oct 5 588 -3:00 Arg AR%sT 1999 Oct 3 589 -4:00 Arg AR%sT 2000 Mar 3 590 -3:00 - ART 2004 Jun 1 591 -4:00 - WART 2004 Jun 20 592 -3:00 Arg AR%sT 2008 Oct 18 593 -3:00 - ART 594# 595# Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF) 596Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 597 -4:16:48 - CMT 1920 May # Córdoba Mean Time 598 -4:00 - ART 1930 Dec 599 -4:00 Arg AR%sT 1969 Oct 5 600 -3:00 Arg AR%sT 1999 Oct 3 601 -4:00 Arg AR%sT 2000 Mar 3 602 -3:00 - ART 2004 May 30 603 -4:00 - WART 2004 Jun 20 604 -3:00 Arg AR%sT 2008 Oct 18 605 -3:00 - ART 606 607# Aruba 608Link America/Curacao America/Aruba 609 610# Bolivia 611# Zone NAME GMTOFF RULES FORMAT [UNTIL] 612Zone America/La_Paz -4:32:36 - LMT 1890 613 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 614 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 615 -4:00 - BOT # Bolivia Time 616 617# Brazil 618 619# From Paul Eggert (1993-11-18): 620# The mayor of Rio recently attempted to change the time zone rules 621# just in his city, in order to leave more summer time for the tourist trade. 622# The rule change lasted only part of the day; 623# the federal government refused to follow the city's rules, and business 624# was in a chaos, so the mayor backed down that afternoon. 625 626# From IATA SSIM (1996-02): 627# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 628# Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ), 629# Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO), 630# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 631# [The last three states are new to this issue of the IATA SSIM.] 632 633# From Gwillim Law (1996-10-07): 634# Geography, history (Tocantins was part of Goiás until 1989), and other 635# sources of time zone information lead me to believe that AL, SE, and TO were 636# always in BR1, and so the only change was whether or not they observed DST.... 637# The earliest issue of the SSIM I have is 2/91. Each issue from then until 638# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 639# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 640# (UTC-4).... The other two time zones given for Brazil are BR3, which is 641# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 642# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 643# become part of the state of Pernambuco). The boundary between BR1 and BR2 644# has never been clearly stated. They've simply been called East and West. 645# However, some conclusions can be drawn from another IATA manual: the Airline 646# Coding Directory, which lists close to 400 airports in Brazil. For each 647# airport it gives a time zone which is coded to the SSIM. From that 648# information, I'm led to conclude that the states of Amapá (AP), Ceará (CE), 649# Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do 650# Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST. 651 652# From Marcos Tadeu (1998-09-27): 653# Brazilian official page <http://pcdsh01.on.br/verao1.html> 654 655# From Jesper Nørgaard (2000-11-03): 656# [For an official list of which regions in Brazil use which time zones, see:] 657# http://pcdsh01.on.br/Fusbr.htm 658# http://pcdsh01.on.br/Fusbrhv.htm 659 660# From Celso Doria via David Madeo (2002-10-09): 661# The reason for the delay this year has to do with elections in Brazil. 662# 663# Unlike in the United States, elections in Brazil are 100% computerized and 664# the results are known almost immediately. Yesterday, it was the first 665# round of the elections when 115 million Brazilians voted for President, 666# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 667# counting (or re-counting) votes anymore and we know there will be a second 668# round for the Presidency and also for some Governors. The 2nd round will 669# take place on October 27th. 670# 671# The reason why the DST will only begin November 3rd is that the thousands 672# of electoral machines used cannot have their time changed, and since the 673# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 674# the Government decided to postpone DST, instead of changing the Constitution 675# (maybe, for the next elections, it will be possible to change the clock)... 676 677# From Rodrigo Severo (2004-10-04): 678# It's just the biannual change made necessary by the much hyped, supposedly 679# modern Brazilian eletronic voting machines which, apparently, can't deal 680# with a time change between the first and the second rounds of the elections. 681 682# From Steffen Thorsen (2007-09-20): 683# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 684# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 685 686# From Paul Schulze (2008-06-24): 687# ...by law number 11.662 of April 24, 2008 (published in the "Diario 688# Oficial da União"...) in Brazil there are changes in the timezones, 689# effective today (00:00am at June 24, 2008) as follows: 690# 691# a) The timezone UTC+5 is extinguished, with all the Acre state and the 692# part of the Amazonas state that had this timezone now being put to the 693# timezone UTC+4 694# b) The whole Pará state now is put at timezone UTC+3, instead of just 695# part of it, as was before. 696# 697# This change follows a proposal of senator Tiao Viana of Acre state, that 698# proposed it due to concerns about open television channels displaying 699# programs inappropriate to youths in the states that had the timezone 700# UTC+5 too early in the night. In the occasion, some more corrections 701# were proposed, trying to unify the timezones of any given state. This 702# change modifies timezone rules defined in decree 2.784 of 18 June, 703# 1913. 704 705# From Rodrigo Severo (2008-06-24): 706# Just correcting the URL: 707# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008 708# 709# As a result of the above Decree I believe the America/Rio_Branco 710# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall 711# be created to represent the...west side of the Pará State. I 712# suggest this new timezone be called Santarem as the most 713# important/populated city in the affected area. 714# 715# This new timezone would be the same as the Rio_Branco timezone up to 716# the 2008/06/24 change which would be to UTC-3 instead of UTC-4. 717 718# From Alex Krivenyshev (2008-06-24): 719# This is a quick reference page for New and Old Brazil Time Zones map. 720# http://www.worldtimezone.com/brazil-time-new-old.php 721# 722# - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05 723# (state Acre and the part of the Amazonas will be UTC/GMT-04) - western 724# part of Par state is moving to one timezone UTC-03 (from UTC-04). 725 726# From Paul Eggert (2002-10-10): 727# The official decrees referenced below are mostly taken from 728# Decretos sobre o Horário de Verão no Brasil. 729# http://pcdsh01.on.br/DecHV.html 730 731# From Steffen Thorsen (2008-08-29): 732# As announced by the government and many newspapers in Brazil late 733# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and 734# it will end on 2009-02-15 (current rule for Brazil is fine). Based on 735# past years experience with the elections, there was a good chance that 736# the start was postponed to November, but it did not happen this year. 737# 738# It has not yet been posted to http://pcdsh01.on.br/DecHV.html 739# 740# An official page about it: 741# http://www.mme.gov.br/site/news/detail.do?newsId=16722 742# Note that this link does not always work directly, but must be accessed 743# by going to 744# http://www.mme.gov.br/first 745# 746# One example link that works directly: 747# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 748# (Portuguese) 749# 750# We have a written a short article about it as well: 751# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html 752# 753# From Alexander Krivenyshev (2011-10-04): 754# State Bahia will return to Daylight savings time this year after 8 years off. 755# The announcement was made by Governor Jaques Wagner in an interview to a 756# television station in Salvador. 757 758# In Portuguese: 759# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html 760# http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html 761 762# From Guilherme Bernardes Rodrigues (2011-10-07): 763# There is news in the media, however there is still no decree about it. 764# I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the 765# official agency about time in Brazil, and she confirmed that the old rule is 766# still in force. 767 768# From Guilherme Bernardes Rodrigues (2011-10-14) 769# It's official, the President signed a decree that includes Bahia in summer 770# time. 771# [ and in a second message (same day): ] 772# I found the decree. 773# 774# DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011 775# Link : 776# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 777 778# From Kelley Cook (2012-10-16): 779# The governor of state of Bahia in Brazil announced on Thursday that 780# due to public pressure, he is reversing the DST policy they implemented 781# last year and will not be going to Summer Time on October 21st.... 782# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia 783 784# From Rodrigo Severo (2012-10-16): 785# Tocantins state will have DST. 786# http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html 787 788# From Steffen Thorsen (2013-09-20): 789# Tocantins in Brazil is very likely not to observe DST from October.... 790# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto 791# We will keep this article updated when this is confirmed: 792# http://www.timeanddate.com/news/time/brazil-starts-dst-2013.html 793 794# From Steffen Thorsen (2013-10-17): 795# http://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html 796# Senator Jorge Viana announced that Acre will change time zone on November 10. 797# He did not specify the time of the change, nor if western parts of Amazonas 798# will change as well. 799# 800# From Paul Eggert (2013-10-17): 801# For now, assume western Amazonas will change as well. 802 803# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 804# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01) 805# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10) 806Rule Brazil 1931 only - Oct 3 11:00 1:00 S 807Rule Brazil 1932 1933 - Apr 1 0:00 0 - 808Rule Brazil 1932 only - Oct 3 0:00 1:00 S 809# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10) 810# revoked DST. 811# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24) 812# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13) 813Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 814Rule Brazil 1950 only - Apr 16 1:00 0 - 815Rule Brazil 1951 1952 - Apr 1 0:00 0 - 816# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24) 817Rule Brazil 1953 only - Mar 1 0:00 0 - 818# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30) 819# revoked DST. 820# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18) 821# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 822# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 823# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03) 824# extended the above decree to all of the national territory on 12-09. 825Rule Brazil 1963 only - Dec 9 0:00 1:00 S 826# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25) 827# extended summer time by one day to 1964-03-01 00:00 (start of school). 828Rule Brazil 1964 only - Mar 1 0:00 0 - 829# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27) 830Rule Brazil 1965 only - Jan 31 0:00 1:00 S 831Rule Brazil 1965 only - Mar 31 0:00 0 - 832# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22) 833Rule Brazil 1965 only - Dec 1 0:00 1:00 S 834# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18) 835Rule Brazil 1966 1968 - Mar 1 0:00 0 - 836Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 837# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15) 838# revoked DST. 839# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27) 840Rule Brazil 1985 only - Nov 2 0:00 1:00 S 841# Decree 92,310 (1986-01-21) 842# Decree 92,463 (1986-03-13) 843Rule Brazil 1986 only - Mar 15 0:00 0 - 844# Decree 93,316 (1986-10-01) 845Rule Brazil 1986 only - Oct 25 0:00 1:00 S 846Rule Brazil 1987 only - Feb 14 0:00 0 - 847# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22) 848Rule Brazil 1987 only - Oct 25 0:00 1:00 S 849Rule Brazil 1988 only - Feb 7 0:00 0 - 850# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12) 851# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 852Rule Brazil 1988 only - Oct 16 0:00 1:00 S 853Rule Brazil 1989 only - Jan 29 0:00 0 - 854# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21) 855# with the same exceptions 856Rule Brazil 1989 only - Oct 15 0:00 1:00 S 857Rule Brazil 1990 only - Feb 11 0:00 0 - 858# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17) 859# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 860# Decree 99,629 (1990-10-19) adds BA, MT. 861Rule Brazil 1990 only - Oct 21 0:00 1:00 S 862Rule Brazil 1991 only - Feb 17 0:00 0 - 863# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25) 864# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 865Rule Brazil 1991 only - Oct 20 0:00 1:00 S 866Rule Brazil 1992 only - Feb 9 0:00 0 - 867# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16) 868# adopted by same states. 869Rule Brazil 1992 only - Oct 25 0:00 1:00 S 870Rule Brazil 1993 only - Jan 31 0:00 0 - 871# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28) 872# adopted by same states, plus AM. 873# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22; 874# web page corrected 2004-01-07) adopted by same states, minus AM. 875# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14) 876# adopted by same states, plus MT and TO. 877# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13) 878# adds AL, SE. 879Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 880Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 881Rule Brazil 1996 only - Feb 11 0:00 0 - 882# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04) 883# adopted by same states, minus AL, SE. 884Rule Brazil 1996 only - Oct 6 0:00 1:00 S 885Rule Brazil 1997 only - Feb 16 0:00 0 - 886# From Daniel C. Sobral (1998-02-12): 887# In 1997, the DS began on October 6. The stated reason was that 888# because international television networks ignored Brazil's policy on DS, 889# they bought the wrong times on satellite for coverage of Pope's visit. 890# This year, the ending date of DS was postponed to March 1 891# to help dealing with the shortages of electric power. 892# 893# Decree 2,317 (1997-09-04), adopted by same states. 894Rule Brazil 1997 only - Oct 6 0:00 1:00 S 895# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG> 896# (1998-02-10) 897Rule Brazil 1998 only - Mar 1 0:00 0 - 898# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11) 899# adopted by the same states as before. 900Rule Brazil 1998 only - Oct 11 0:00 1:00 S 901Rule Brazil 1999 only - Feb 21 0:00 0 - 902# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif> 903# (1999-08-23) adopted by same states. 904# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30) 905# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 906Rule Brazil 1999 only - Oct 3 0:00 1:00 S 907Rule Brazil 2000 only - Feb 27 0:00 0 - 908# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06) 909# adopted by the same states as before. 910# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13) 911# repeals DST in PE and RR, effective 2000-10-15 00:00. 912# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17) 913# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 914# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif> 915# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 916Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 917Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 918# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 919# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm> 920Rule Brazil 2002 only - Nov 3 0:00 1:00 S 921# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 922# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm> 923Rule Brazil 2003 only - Oct 19 0:00 1:00 S 924# Decree 5,223 (2004-10-01) reestablishes DST in MT. 925# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm> 926Rule Brazil 2004 only - Nov 2 0:00 1:00 S 927# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19), 928# adopted by the same states as before. 929Rule Brazil 2005 only - Oct 16 0:00 1:00 S 930# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03), 931# adopted by the same states as before. 932Rule Brazil 2006 only - Nov 5 0:00 1:00 S 933Rule Brazil 2007 only - Feb 25 0:00 0 - 934# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26), 935# adopted by the same states as before. 936Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S 937# From Frederico A. C. Neves (2008-09-10): 938# According to this decree 939# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm 940# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the 941# 3rd Feb Sunday. There is an exception on the return date when this is 942# the Carnival Sunday then the return date will be the next Sunday... 943Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S 944Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - 945Rule Brazil 2012 only - Feb Sun>=22 0:00 0 - 946Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - 947Rule Brazil 2015 only - Feb Sun>=22 0:00 0 - 948Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 - 949Rule Brazil 2023 only - Feb Sun>=22 0:00 0 - 950Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 - 951Rule Brazil 2026 only - Feb Sun>=22 0:00 0 - 952Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 - 953Rule Brazil 2034 only - Feb Sun>=22 0:00 0 - 954Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 - 955Rule Brazil 2037 only - Feb Sun>=22 0:00 0 - 956# From Arthur David Olson (2008-09-29): 957# The next is wrong in some years but is better than nothing. 958Rule Brazil 2038 max - Feb Sun>=15 0:00 0 - 959 960# The latest ruleset listed above says that the following states observe DST: 961# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 962 963# Zone NAME GMTOFF RULES FORMAT [UNTIL] 964# 965# Fernando de Noronha (administratively part of PE) 966Zone America/Noronha -2:09:40 - LMT 1914 967 -2:00 Brazil FN%sT 1990 Sep 17 968 -2:00 - FNT 1999 Sep 30 969 -2:00 Brazil FN%sT 2000 Oct 15 970 -2:00 - FNT 2001 Sep 13 971 -2:00 Brazil FN%sT 2002 Oct 1 972 -2:00 - FNT 973# Other Atlantic islands have no permanent settlement. 974# These include Trindade and Martim Vaz (administratively part of ES), 975# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). 976# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 977# it also included the Penedos. 978# 979# Amapá (AP), east Pará (PA) 980# East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu. 981# The division between east and west Pará is the river Xingu. 982# In the north a very small part from the river Javary (now Jari I guess, 983# the border with Amapá) to the Amazon, then to the Xingu. 984Zone America/Belem -3:13:56 - LMT 1914 985 -3:00 Brazil BR%sT 1988 Sep 12 986 -3:00 - BRT 987# 988# west Pará (PA) 989# West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém. 990Zone America/Santarem -3:38:48 - LMT 1914 991 -4:00 Brazil AM%sT 1988 Sep 12 992 -4:00 - AMT 2008 Jun 24 0:00 993 -3:00 - BRT 994# 995# Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN), 996# Paraíba (PB) 997Zone America/Fortaleza -2:34:00 - LMT 1914 998 -3:00 Brazil BR%sT 1990 Sep 17 999 -3:00 - BRT 1999 Sep 30 1000 -3:00 Brazil BR%sT 2000 Oct 22 1001 -3:00 - BRT 2001 Sep 13 1002 -3:00 Brazil BR%sT 2002 Oct 1 1003 -3:00 - BRT 1004# 1005# Pernambuco (PE) (except Atlantic islands) 1006Zone America/Recife -2:19:36 - LMT 1914 1007 -3:00 Brazil BR%sT 1990 Sep 17 1008 -3:00 - BRT 1999 Sep 30 1009 -3:00 Brazil BR%sT 2000 Oct 15 1010 -3:00 - BRT 2001 Sep 13 1011 -3:00 Brazil BR%sT 2002 Oct 1 1012 -3:00 - BRT 1013# 1014# Tocantins (TO) 1015Zone America/Araguaina -3:12:48 - LMT 1914 1016 -3:00 Brazil BR%sT 1990 Sep 17 1017 -3:00 - BRT 1995 Sep 14 1018 -3:00 Brazil BR%sT 2003 Sep 24 1019 -3:00 - BRT 2012 Oct 21 1020 -3:00 Brazil BR%sT 2013 Sep 1021 -3:00 - BRT 1022# 1023# Alagoas (AL), Sergipe (SE) 1024Zone America/Maceio -2:22:52 - LMT 1914 1025 -3:00 Brazil BR%sT 1990 Sep 17 1026 -3:00 - BRT 1995 Oct 13 1027 -3:00 Brazil BR%sT 1996 Sep 4 1028 -3:00 - BRT 1999 Sep 30 1029 -3:00 Brazil BR%sT 2000 Oct 22 1030 -3:00 - BRT 2001 Sep 13 1031 -3:00 Brazil BR%sT 2002 Oct 1 1032 -3:00 - BRT 1033# 1034# Bahia (BA) 1035# There are too many Salvadors elsewhere, so use America/Bahia instead 1036# of America/Salvador. 1037Zone America/Bahia -2:34:04 - LMT 1914 1038 -3:00 Brazil BR%sT 2003 Sep 24 1039 -3:00 - BRT 2011 Oct 16 1040 -3:00 Brazil BR%sT 2012 Oct 21 1041 -3:00 - BRT 1042# 1043# Goiás (GO), Distrito Federal (DF), Minas Gerais (MG), 1044# Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR), 1045# Santa Catarina (SC), Rio Grande do Sul (RS) 1046Zone America/Sao_Paulo -3:06:28 - LMT 1914 1047 -3:00 Brazil BR%sT 1963 Oct 23 0:00 1048 -3:00 1:00 BRST 1964 1049 -3:00 Brazil BR%sT 1050# 1051# Mato Grosso do Sul (MS) 1052Zone America/Campo_Grande -3:38:28 - LMT 1914 1053 -4:00 Brazil AM%sT 1054# 1055# Mato Grosso (MT) 1056Zone America/Cuiaba -3:44:20 - LMT 1914 1057 -4:00 Brazil AM%sT 2003 Sep 24 1058 -4:00 - AMT 2004 Oct 1 1059 -4:00 Brazil AM%sT 1060# 1061# Rondônia (RO) 1062Zone America/Porto_Velho -4:15:36 - LMT 1914 1063 -4:00 Brazil AM%sT 1988 Sep 12 1064 -4:00 - AMT 1065# 1066# Roraima (RR) 1067Zone America/Boa_Vista -4:02:40 - LMT 1914 1068 -4:00 Brazil AM%sT 1988 Sep 12 1069 -4:00 - AMT 1999 Sep 30 1070 -4:00 Brazil AM%sT 2000 Oct 15 1071 -4:00 - AMT 1072# 1073# east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto 1074# The great circle line from Tabatinga to Porto Acre divides 1075# east from west Amazonas. 1076Zone America/Manaus -4:00:04 - LMT 1914 1077 -4:00 Brazil AM%sT 1988 Sep 12 1078 -4:00 - AMT 1993 Sep 28 1079 -4:00 Brazil AM%sT 1994 Sep 22 1080 -4:00 - AMT 1081# 1082# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 1083# Eirunepé, Envira, Ipixuna 1084Zone America/Eirunepe -4:39:28 - LMT 1914 1085 -5:00 Brazil AC%sT 1988 Sep 12 1086 -5:00 - ACT 1993 Sep 28 1087 -5:00 Brazil AC%sT 1994 Sep 22 1088 -5:00 - ACT 2008 Jun 24 0:00 1089 -4:00 - AMT 2013 Nov 10 1090 -5:00 - ACT 1091# 1092# Acre (AC) 1093Zone America/Rio_Branco -4:31:12 - LMT 1914 1094 -5:00 Brazil AC%sT 1988 Sep 12 1095 -5:00 - ACT 2008 Jun 24 0:00 1096 -4:00 - AMT 2013 Nov 10 1097 -5:00 - ACT 1098 1099# Chile 1100 1101# From Eduardo Krell (1995-10-19): 1102# The law says to switch to DST at midnight [24:00] on the second SATURDAY 1103# of October.... The law is the same for March and October. 1104# (1998-09-29): 1105# Because of the drought this year, the government decided to go into 1106# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 1107# (unless there's another dry season next year, I guess). 1108 1109# From Julio I. Pacheco Troncoso (1999-03-18): 1110# Because of the same drought, the government decided to end DST later, 1111# on April 3, (one-time change). 1112 1113# From Oscar van Vlijmen (2006-10-08): 1114# http://www.horaoficial.cl/cambio.htm 1115 1116# From Jesper Nørgaard Welen (2006-10-08): 1117# I think that there are some obvious mistakes in the suggested link 1118# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4 1119# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15 1120# (they should have been 1990-09-15 and 1990-09-16 respectively), but 1121# anyhow it clears up some doubts too. 1122 1123# From Paul Eggert (2014-08-12): 1124# The following data entries for Chile and America/Santiago are from 1125# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by 1126# Jesper Nørgaard Welen. The data entries for Pacific/Easter are from Shanks 1127# & Pottenger, except with DST transitions after 1932 cloned from 1128# America/Santiago. The pre-1980 Pacific/Easter data entries are dubious, 1129# but we have no other source. 1130 1131# From Germán Poo-Caamaño (2008-03-03): 1132# Due to drought, Chile extends Daylight Time in three weeks. This 1133# is one-time change (Saturday 3/29 at 24:00 for America/Santiago 1134# and Saturday 3/29 at 22:00 for Pacific/Easter) 1135# The Supreme Decree is located at 1136# http://www.shoa.cl/servicios/supremo316.pdf 1137# and the instructions for 2008 are located in: 1138# http://www.horaoficial.cl/cambio.htm 1139 1140# From José Miguel Garrido (2008-03-05): 1141# ... 1142# You could see the announces of the change on 1143# http://www.shoa.cl/noticias/2008/04hora/hora.htm 1144 1145# From Angel Chiang (2010-03-04): 1146# Subject: DST in Chile exceptionally extended to 3 April due to earthquake 1147# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 1148# (in Spanish, last paragraph). 1149# 1150# This is breaking news. There should be more information available later. 1151 1152# From Arthur David Olson (2010-03-06): 1153# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch. 1154 1155# From Glenn Eychaner (2011-03-02): 1156# It appears that the Chilean government has decided to postpone the 1157# change from summer time to winter time again, by three weeks to April 1158# 2nd: 1159# http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651 1160# 1161# This is not yet reflected in the official "cambio de hora" site, but 1162# probably will be soon: 1163# http://www.horaoficial.cl/cambio.htm 1164 1165# From Arthur David Olson (2011-03-02): 1166# The emol.com article mentions a water shortage as the cause of the 1167# postponement, which may mean that it's not a permanent change. 1168 1169# From Glenn Eychaner (2011-03-28): 1170# The article: 1171# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} 1172# 1173# In English: 1174# Chile's clocks will go back an hour this year on the 7th of May instead 1175# of this Saturday. They will go forward again the 3rd Saturday in 1176# August, not in October as they have since 1968. This is a pilot plan 1177# which will be reevaluated in 2012. 1178 1179# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): 1180# As stated in the website of the Chilean Energy Ministry 1181# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html 1182# The Chilean Government has decided to postpone the entrance into winter time 1183# (to leave DST) from March 11 2012 to April 28th 2012. The decision has not 1184# been yet formalized but it will within the next days. 1185# Quote from the website communication: 1186# 1187# 6. For the year 2012, the dates of entry into winter time will be as follows: 1188# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at 1189# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 1190# of the same day. 1191# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, 1192# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be 1193# 01:00 on September 2. 1194 1195# From Steffen Thorsen (2013-02-15): 1196# According to several news sources, Chile has extended DST this year, 1197# they will end DST later and start DST earlier than planned. They 1198# hope to save energy. The new end date is 2013-04-28 00:00 and new 1199# start date is 2013-09-08 00:00.... 1200# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm 1201 1202# From José Miguel Garrido (2014-02-19): 1203# Today appeared in the Diario Oficial a decree amending the time change 1204# dates to 2014. 1205# DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC) 1206# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC) 1207# http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf 1208 1209# NOTE: ChileAQ rules for Antarctic bases are stored separately in the 1210# 'antarctica' file. 1211 1212# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1213Rule Chile 1927 1932 - Sep 1 0:00 1:00 S 1214Rule Chile 1928 1932 - Apr 1 0:00 0 - 1215Rule Chile 1942 only - Jun 1 4:00u 0 - 1216Rule Chile 1942 only - Aug 1 5:00u 1:00 S 1217Rule Chile 1946 only - Jul 15 4:00u 1:00 S 1218Rule Chile 1946 only - Sep 1 3:00u 0:00 - 1219Rule Chile 1947 only - Apr 1 4:00u 0 - 1220Rule Chile 1968 only - Nov 3 4:00u 1:00 S 1221Rule Chile 1969 only - Mar 30 3:00u 0 - 1222Rule Chile 1969 only - Nov 23 4:00u 1:00 S 1223Rule Chile 1970 only - Mar 29 3:00u 0 - 1224Rule Chile 1971 only - Mar 14 3:00u 0 - 1225Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S 1226Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 1227Rule Chile 1973 only - Sep 30 4:00u 1:00 S 1228Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S 1229Rule Chile 1987 only - Apr 12 3:00u 0 - 1230Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 - 1231Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S 1232Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S 1233Rule Chile 1990 only - Mar 18 3:00u 0 - 1234Rule Chile 1990 only - Sep 16 4:00u 1:00 S 1235Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 1236Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S 1237Rule Chile 1997 only - Mar 30 3:00u 0 - 1238Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - 1239Rule Chile 1998 only - Sep 27 4:00u 1:00 S 1240Rule Chile 1999 only - Apr 4 3:00u 0 - 1241Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S 1242Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - 1243# N.B.: the end of March 29 in Chile is March 30 in Universal time, 1244# which is used below in specifying the transition. 1245Rule Chile 2008 only - Mar 30 3:00u 0 - 1246Rule Chile 2009 only - Mar Sun>=9 3:00u 0 - 1247Rule Chile 2010 only - Apr Sun>=1 3:00u 0 - 1248Rule Chile 2011 only - May Sun>=2 3:00u 0 - 1249Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S 1250Rule Chile 2012 max - Apr Sun>=23 3:00u 0 - 1251Rule Chile 2012 max - Sep Sun>=2 4:00u 1:00 S 1252# IATA SSIM anomalies: (1992-02) says 1992-03-14; 1253# (1996-09) says 1998-03-08. Ignore these. 1254# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1255Zone America/Santiago -4:42:46 - LMT 1890 1256 -4:42:46 - SMT 1910 # Santiago Mean Time 1257 -5:00 - CLT 1916 Jul 1 # Chile Time 1258 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time 1259 -4:00 - CLT 1919 Jul 1 # Chile Time 1260 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time 1261 -5:00 Chile CL%sT 1947 May 22 # Chile Time 1262 -4:00 Chile CL%sT 1263Zone Pacific/Easter -7:17:44 - LMT 1890 1264 -7:17:28 - EMT 1932 Sep # Easter Mean Time 1265 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter Time 1266 -6:00 Chile EAS%sT 1267# 1268# Salas y Gómez Island is uninhabited. 1269# Other Chilean locations, including Juan Fernández Is, Desventuradas Is, 1270# and Antarctic bases, are like America/Santiago. 1271 1272# Colombia 1273 1274# Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes, 1275# "A variation of fifteen minutes in the public clocks of Bogota is not rare." 1276 1277# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1278Rule CO 1992 only - May 3 0:00 1:00 S 1279Rule CO 1993 only - Apr 4 0:00 0 - 1280# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1281Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 1282 -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time 1283 -5:00 CO CO%sT # Colombia Time 1284# Malpelo, Providencia, San Andres 1285# no information; probably like America/Bogota 1286 1287# Curaçao 1288 1289# Milne gives 4:35:46.9 for Curaçao mean time; round to nearest. 1290# 1291# From Paul Eggert (2006-03-22): 1292# Shanks & Pottenger say that The Bottom and Philipsburg have been at 1293# -4:00 since standard time was introduced on 1912-03-02; and that 1294# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from 1295# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say 1296# Saba Island has been like Curaçao. 1297# This all predates our 1970 cutoff, though. 1298# 1299# By July 2007 Curaçao and St Maarten are planned to become 1300# associated states within the Netherlands, much like Aruba; 1301# Bonaire, Saba and St Eustatius would become directly part of the 1302# Netherlands as Kingdom Islands. This won't affect their time zones 1303# though, as far as we know. 1304# 1305# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1306Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad 1307 -4:30 - ANT 1965 # Netherlands Antilles Time 1308 -4:00 - AST 1309 1310# From Arthur David Olson (2011-06-15): 1311# use links for places with new iso3166 codes. 1312# The name "Lower Prince's Quarter" is both longer than fourteen characters 1313# and contains an apostrophe; use "Lower_Princes" below. 1314 1315Link America/Curacao America/Lower_Princes # Sint Maarten 1316Link America/Curacao America/Kralendijk # Caribbean Netherlands 1317 1318# Ecuador 1319# 1320# Milne says the Central and South American Telegraph Company used -5:24:15. 1321# 1322# From Paul Eggert (2007-03-04): 1323# Apparently Ecuador had a failed experiment with DST in 1992. 1324# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and 1325# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both 1326# talk about "hora Sixto". Leave this alone for now, as we have no data. 1327# 1328# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1329Zone America/Guayaquil -5:19:20 - LMT 1890 1330 -5:14:00 - QMT 1931 # Quito Mean Time 1331 -5:00 - ECT # Ecuador Time 1332Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 1333 -5:00 - ECT 1986 1334 -6:00 - GALT # Galápagos Time 1335 1336# Falklands 1337 1338# From Paul Eggert (2006-03-22): 1339# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 1340# the IATA gives 1996-09-08. Go with Shanks & Pottenger. 1341 1342# From Falkland Islands Government Office, London (2001-01-22) 1343# via Jesper Nørgaard: 1344# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 1345# April 2001 and advance one hour to summer time at 2 am on Sunday 2 1346# September. It is anticipated that the clocks will revert back at 2 1347# am on Sunday 21 April 2002 and advance to summer time at 2 am on 1348# Sunday 1 September. 1349 1350# From Rives McDow (2001-02-13): 1351# 1352# I have communicated several times with people there, and the last 1353# time I had communications that was helpful was in 1998. Here is 1354# what was said then: 1355# 1356# "The general rule was that Stanley used daylight saving and the Camp 1357# did not. However for various reasons many people in the Camp have 1358# started to use daylight saving (known locally as 'Stanley Time') 1359# There is no rule as to who uses daylight saving - it is a matter of 1360# personal choice and so it is impossible to draw a map showing who 1361# uses it and who does not. Any list would be out of date as soon as 1362# it was produced. This year daylight saving ended on April 18/19th 1363# and started again on September 12/13th. I do not know what the rule 1364# is, but can find out if you like. We do not change at the same time 1365# as UK or Chile." 1366# 1367# I did have in my notes that the rule was "Second Saturday in Sep at 1368# 0:00 until third Saturday in Apr at 0:00". I think that this does 1369# not agree in some cases with Shanks; is this true? 1370# 1371# Also, there is no mention in the list that some areas in the 1372# Falklands do not use DST. I have found in my communications there 1373# that these areas are on the western half of East Falkland and all of 1374# West Falkland. Stanley is the only place that consistently observes 1375# DST. Again, as in other places in the world, the farmers don't like 1376# it. West Falkland is almost entirely sheep farmers. 1377# 1378# I know one lady there that keeps a list of which farm keeps DST and 1379# which doesn't each year. She runs a shop in Stanley, and says that 1380# the list changes each year. She uses it to communicate to her 1381# customers, catching them when they are home for lunch or dinner. 1382 1383# From Paul Eggert (2001-03-05): 1384# For now, we'll just record the time in Stanley, since we have no 1385# better info. 1386 1387# From Steffen Thorsen (2011-04-01): 1388# The Falkland Islands will not turn back clocks this winter, but stay on 1389# daylight saving time. 1390# 1391# One source: 1392# http://www.falklandnews.com/public/story.cfm?get=5914&source=3 1393# 1394# We have gotten this confirmed by a clerk of the legislative assembly: 1395# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the 1396# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 1397# hours) on the first Sunday of September at 0200hrs. 1398# 1399# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands 1400# will not revert to local mean time, but clocks will remain on Summer 1401# time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term 1402# change to local time following the trial period will be notified. 1403# 1404# From Andrew Newman (2012-02-24) 1405# A letter from Justin McPhee, Chief Executive, 1406# Cable & Wireless Falkland Islands (dated 2012-02-22) 1407# states... 1408# The current Atlantic/Stanley entry under South America expects the 1409# clocks to go back to standard Falklands Time (FKT) on the 15th April. 1410# The database entry states that in 2011 Stanley was staying on fixed 1411# summer time on a trial basis only. FIG need to contact IANA and/or 1412# the maintainers of the database to inform them we're adopting 1413# the same policy this year and suggest recommendations for future years. 1414# 1415# For now we will assume permanent summer time for the Falklands 1416# until advised differently (to apply for 2012 and beyond, after the 2011 1417# experiment was apparently successful.) 1418# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1419Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 1420Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 1421Rule Falk 1939 only - Oct 1 0:00 1:00 S 1422Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 1423Rule Falk 1943 only - Jan 1 0:00 0 - 1424Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 1425Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 1426Rule Falk 1984 only - Sep 16 0:00 1:00 S 1427Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 1428Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 1429Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 - 1430Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S 1431# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1432Zone Atlantic/Stanley -3:51:24 - LMT 1890 1433 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 1434 -4:00 Falk FK%sT 1983 May # Falkland Is Time 1435 -3:00 Falk FK%sT 1985 Sep 15 1436 -4:00 Falk FK%sT 2010 Sep 5 2:00 1437 -3:00 - FKST 1438 1439# French Guiana 1440# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1441Zone America/Cayenne -3:29:20 - LMT 1911 Jul 1442 -4:00 - GFT 1967 Oct # French Guiana Time 1443 -3:00 - GFT 1444 1445# Guyana 1446# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1447Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 1448 -3:45 - GBGT 1966 May 26 # Br Guiana Time 1449 -3:45 - GYT 1975 Jul 31 # Guyana Time 1450 -3:00 - GYT 1991 1451# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 1452 -4:00 - GYT 1453 1454# Paraguay 1455# 1456# From Paul Eggert (2006-03-22): 1457# Shanks & Pottenger say that spring transitions are 01:00 -> 02:00, 1458# and autumn transitions are 00:00 -> 23:00. Go with pre-1999 1459# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 1460# 1461# From Waldemar Villamayor-Venialbo (2013-09-20): 1462# No time of the day is established for the adjustment, so people normally 1463# adjust their clocks at 0 hour of the given dates. 1464# 1465# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1466Rule Para 1975 1988 - Oct 1 0:00 1:00 S 1467Rule Para 1975 1978 - Mar 1 0:00 0 - 1468Rule Para 1979 1991 - Apr 1 0:00 0 - 1469Rule Para 1989 only - Oct 22 0:00 1:00 S 1470Rule Para 1990 only - Oct 1 0:00 1:00 S 1471Rule Para 1991 only - Oct 6 0:00 1:00 S 1472Rule Para 1992 only - Mar 1 0:00 0 - 1473Rule Para 1992 only - Oct 5 0:00 1:00 S 1474Rule Para 1993 only - Mar 31 0:00 0 - 1475Rule Para 1993 1995 - Oct 1 0:00 1:00 S 1476Rule Para 1994 1995 - Feb lastSun 0:00 0 - 1477Rule Para 1996 only - Mar 1 0:00 0 - 1478# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 1479# From Steffen Thorsen (2000-10-02): 1480# I have three independent reports that Paraguay changed to DST this Sunday 1481# (10-01). 1482# 1483# Translated by Gwillim Law (2001-02-27) from 1484# Noticias, a daily paper in Asunción, Paraguay (2000-10-01): 1485# http://www.diarionoticias.com.py/011000/nacional/naciona1.htm 1486# Starting at 0:00 today, the clock will be set forward 60 minutes, in 1487# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 1488# system has been operating for several years. Formerly there was a separate 1489# decree each year; the new law has the same effect, but permanently. Every 1490# year, the time will change on the first Sunday of October; likewise, the 1491# clock will be set back on the first Sunday of March. 1492# 1493Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 1494# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 1495Rule Para 1997 only - Feb lastSun 0:00 0 - 1496# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 1497# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 1498Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 1499# From Rives McDow (2002-02-28): 1500# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 1501# dst method to be from the first Sunday in September to the first Sunday in 1502# April. 1503Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 1504Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 1505# 1506# From Jesper Nørgaard Welen (2005-01-02): 1507# There are several sources that claim that Paraguay made 1508# a timezone rule change in autumn 2004. 1509# From Steffen Thorsen (2005-01-05): 1510# Decree 1,867 (2004-03-05) 1511# From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13) 1512# http://www.presidencia.gov.py/decretos/D1867.pdf 1513Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S 1514Rule Para 2005 2009 - Mar Sun>=8 0:00 0 - 1515# From Carlos Raúl Perasso (2010-02-18): 1516# By decree number 3958 issued yesterday 1517# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf 1518# Paraguay changes its DST schedule, postponing the March rule to April and 1519# modifying the October date. The decree reads: 1520# ... 1521# Art. 1. It is hereby established that from the second Sunday of the month of 1522# April of this year (2010), the official time is to be set back 60 minutes, 1523# and that on the first Sunday of the month of October, it is to be set 1524# forward 60 minutes, in all the territory of the Paraguayan Republic. 1525# ... 1526Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S 1527Rule Para 2010 2012 - Apr Sun>=8 0:00 0 - 1528# 1529# From Steffen Thorsen (2013-03-07): 1530# Paraguay will end DST on 2013-03-24 00:00.... 1531# http://www.ande.gov.py/interna.php?id=1075 1532# 1533# From Carlos Raúl Perasso (2013-03-15): 1534# The change in Paraguay is now final. Decree number 10780 1535# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf 1536# From Carlos Raúl Perasso (2014-02-28): 1537# Decree 1264 can be found at: 1538# http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf 1539Rule Para 2013 max - Mar Sun>=22 0:00 0 - 1540 1541# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1542Zone America/Asuncion -3:50:40 - LMT 1890 1543 -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time 1544 -4:00 - PYT 1972 Oct # Paraguay Time 1545 -3:00 - PYT 1974 Apr 1546 -4:00 Para PY%sT 1547 1548# Peru 1549# 1550# From Evelyn C. Leeper via Mark Brader (2003-10-26) 1551# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>: 1552# When we were in Peru in 1985-1986, they apparently switched over 1553# sometime between December 29 and January 3 while we were on the Amazon. 1554# 1555# From Paul Eggert (2006-03-22): 1556# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 1557 1558# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1559Rule Peru 1938 only - Jan 1 0:00 1:00 S 1560Rule Peru 1938 only - Apr 1 0:00 0 - 1561Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 1562Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 1563Rule Peru 1986 1987 - Jan 1 0:00 1:00 S 1564Rule Peru 1986 1987 - Apr 1 0:00 0 - 1565Rule Peru 1990 only - Jan 1 0:00 1:00 S 1566Rule Peru 1990 only - Apr 1 0:00 0 - 1567# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 1568Rule Peru 1994 only - Jan 1 0:00 1:00 S 1569Rule Peru 1994 only - Apr 1 0:00 0 - 1570# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1571Zone America/Lima -5:08:12 - LMT 1890 1572 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 1573 -5:00 Peru PE%sT # Peru Time 1574 1575# South Georgia 1576# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1577Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 1578 -2:00 - GST # South Georgia Time 1579 1580# South Sandwich Is 1581# uninhabited; scientific personnel have wintered 1582 1583# Suriname 1584# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1585Zone America/Paramaribo -3:40:40 - LMT 1911 1586 -3:40:52 - PMT 1935 # Paramaribo Mean Time 1587 -3:40:36 - PMT 1945 Oct # The capital moved? 1588 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 1589 -3:30 - SRT 1984 Oct # Suriname Time 1590 -3:00 - SRT 1591 1592# Trinidad and Tobago 1593# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1594Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 1595 -4:00 - AST 1596 1597# These all agree with Trinidad and Tobago since 1970. 1598Link America/Port_of_Spain America/Anguilla 1599Link America/Port_of_Spain America/Dominica 1600Link America/Port_of_Spain America/Grenada 1601Link America/Port_of_Spain America/Guadeloupe 1602Link America/Port_of_Spain America/Marigot # St Martin (French part) 1603Link America/Port_of_Spain America/Montserrat 1604Link America/Port_of_Spain America/St_Barthelemy # St Barthélemy 1605Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis 1606Link America/Port_of_Spain America/St_Lucia 1607Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US) 1608Link America/Port_of_Spain America/St_Vincent 1609Link America/Port_of_Spain America/Tortola # Virgin Islands (UK) 1610 1611# Uruguay 1612# From Paul Eggert (1993-11-18): 1613# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1614# From Shanks & Pottenger: 1615# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1616# Whitman gives 1923 Oct 1; go with Shanks & Pottenger. 1617Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 1618Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1619Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 1620Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1621# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman. 1622Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 1623Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 1624Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1625# Whitman gives 1937 Oct 3; go with Shanks & Pottenger. 1626Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 1627# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1628# and 1943 Apr 13 "to present time"; go with Shanks & Pottenger. 1629Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS 1630Rule Uruguay 1942 only - Jan 1 0:00 0 - 1631Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 1632Rule Uruguay 1943 only - Mar 14 0:00 0 - 1633Rule Uruguay 1959 only - May 24 0:00 1:00 S 1634Rule Uruguay 1959 only - Nov 15 0:00 0 - 1635Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 1636Rule Uruguay 1960 only - Mar 6 0:00 0 - 1637Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 1638Rule Uruguay 1965 only - Sep 26 0:00 0 - 1639Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 1640Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 1641Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 1642Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 1643Rule Uruguay 1972 only - Aug 15 0:00 0 - 1644Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 1645Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 1646Rule Uruguay 1976 only - Oct 1 0:00 0 - 1647Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 1648Rule Uruguay 1978 only - Apr 1 0:00 0 - 1649Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 1650Rule Uruguay 1980 only - May 1 0:00 0 - 1651Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 1652Rule Uruguay 1988 only - Mar 14 0:00 0 - 1653Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 1654Rule Uruguay 1989 only - Mar 12 0:00 0 - 1655Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 1656# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2, 1657# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 1658Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 1659Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 1660Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 1661Rule Uruguay 1993 only - Feb 28 0:00 0 - 1662# From Eduardo Cota (2004-09-20): 1663# The Uruguayan government has decreed a change in the local time.... 1664# http://www.presidencia.gub.uy/decretos/2004091502.htm 1665Rule Uruguay 2004 only - Sep 19 0:00 1:00 S 1666# From Steffen Thorsen (2005-03-11): 1667# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1668# save energy ... it was postponed two weeks.... 1669# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1670Rule Uruguay 2005 only - Mar 27 2:00 0 - 1671# From Eduardo Cota (2005-09-27): 1672# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1673# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1674# 02:00 local time, official time in Uruguay will be at GMT -2. 1675Rule Uruguay 2005 only - Oct 9 2:00 1:00 S 1676Rule Uruguay 2006 only - Mar 12 2:00 0 - 1677# From Jesper Nørgaard Welen (2006-09-06): 1678# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF 1679Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S 1680Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 - 1681# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1682Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 1683 -3:44:44 - MMT 1920 May 1 # Montevideo MT 1684 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 1685 -3:00 Uruguay UY%sT 1686 1687# Venezuela 1688# 1689# From John Stainforth (2007-11-28): 1690# ... the change for Venezuela originally expected for 2007-12-31 has 1691# been brought forward to 2007-12-09. The official announcement was 1692# published today in the "Gaceta Oficial de la República Bolivariana 1693# de Venezuela, número 38.819" (official document for all laws or 1694# resolution publication) 1695# http://www.globovision.com/news.php?nid=72208 1696 1697# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1698Zone America/Caracas -4:27:44 - LMT 1890 1699 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 1700 -4:30 - VET 1965 # Venezuela Time 1701 -4:00 - VET 2007 Dec 9 3:00 1702 -4:30 - VET 1703
