southamerica revision 174242
1174242Sedwin# @(#)southamerica 8.13 2153761Swollman# <pre> 364499Swollman 42742Swollman# This data is by no means authoritative; if you think you know better, 52742Swollman# go ahead and edit the file (and please send any changes to 62742Swollman# tz@elsie.nci.nih.gov for general use in the future). 72742Swollman 8158421Swollman# From Paul Eggert (2006-03-22): 92742Swollman# A good source for time zone historical data outside the U.S. is 10158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 11158421Swollman# San Diego: ACS Publications, Inc. (2003). 122742Swollman# 1386222Swollman# Gwillim Law writes that a good source 1420094Swollman# for recent time zone data is the International Air Transport 1520094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 1620094Swollman# published semiannually. Law sent in several helpful summaries 1720094Swollman# of the IATA's data after 1990. 1820094Swollman# 19158421Swollman# Except where otherwise noted, Shanks & Pottenger is the source for 20158421Swollman# entries through 1990, and IATA SSIM is the source for entries afterwards. 2120094Swollman# 2219878Swollman# Earlier editions of these tables used the North American style (e.g. ARST and 2319878Swollman# ARDT for Argentine Standard and Daylight Time), but the following quote 2419878Swollman# suggests that it's better to use European style (e.g. ART and ARST). 2519878Swollman# I suggest the use of _Summer time_ instead of the more cumbersome 2619878Swollman# _daylight-saving time_. _Summer time_ seems to be in general use 2719878Swollman# in Europe and South America. 2819878Swollman# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 2919878Swollman# H L Mencken, _The American Language: Supplement I_ (1960), p 466 3058787Sru# 3158787Sru# Earlier editions of these tables also used the North American style 3258787Sru# for time zones in Brazil, but this was incorrect, as Brazilians say 3358787Sru# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in 3458787Sru# the railroad sector, writes (1999-07-06): 3558787Sru# The subject of time zones is currently a matter of discussion/debate in 3658787Sru# Brazil. Let's say that "the Brasilia time" is considered the 3758787Sru# "official time" because Brasilia is the capital city. 3858787Sru# The other three time zones are called "Brasilia time "minus one" or 3958787Sru# "plus one" or "plus two". As far as I know there is no such 4058787Sru# name/designation as "Eastern Time" or "Central Time". 4158787Sru# So I invented the following (English-language) abbreviations for now. 4258787Sru# Corrections are welcome! 4358787Sru# std dst 4458787Sru# -2:00 FNT FNST Fernando de Noronha 4558787Sru# -3:00 BRT BRST Brasilia 4658787Sru# -4:00 AMT AMST Amazon 4758787Sru# -5:00 ACT ACST Acre 482742Swollman 492742Swollman############################################################################### 502742Swollman 512742Swollman############################################################################### 522742Swollman 532742Swollman# Argentina 542742Swollman 5519878Swollman# From Bob Devine (1988-01-28): 562742Swollman# Argentina: first Sunday in October to first Sunday in April since 1976. 572742Swollman# Double Summer time from 1969 to 1974. Switches at midnight. 582742Swollman 5919878Swollman# From U. S. Naval Observatory (1988-01-199): 602742Swollman# ARGENTINA 3 H BEHIND UTC 612742Swollman 62149514Swollman# From Hernan G. Otero (1995-06-26): 6321217Swollman# I am sending modifications to the Argentine time zone table... 649908Swollman# AR was chosen because they are the ISO letters that represent Argentina. 659908Swollman 662742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 6719878SwollmanRule Arg 1930 only - Dec 1 0:00 1:00 S 6819878SwollmanRule Arg 1931 only - Apr 1 0:00 0 - 6919878SwollmanRule Arg 1931 only - Oct 15 0:00 1:00 S 7019878SwollmanRule Arg 1932 1940 - Mar 1 0:00 0 - 7119878SwollmanRule Arg 1932 1939 - Nov 1 0:00 1:00 S 7219878SwollmanRule Arg 1940 only - Jul 1 0:00 1:00 S 7319878SwollmanRule Arg 1941 only - Jun 15 0:00 0 - 7419878SwollmanRule Arg 1941 only - Oct 15 0:00 1:00 S 7519878SwollmanRule Arg 1943 only - Aug 1 0:00 0 - 7619878SwollmanRule Arg 1943 only - Oct 15 0:00 1:00 S 7719878SwollmanRule Arg 1946 only - Mar 1 0:00 0 - 7819878SwollmanRule Arg 1946 only - Oct 1 0:00 1:00 S 7919878SwollmanRule Arg 1963 only - Oct 1 0:00 0 - 8019878SwollmanRule Arg 1963 only - Dec 15 0:00 1:00 S 8119878SwollmanRule Arg 1964 1966 - Mar 1 0:00 0 - 8219878SwollmanRule Arg 1964 1966 - Oct 15 0:00 1:00 S 8393799SwollmanRule Arg 1967 only - Apr 2 0:00 0 - 8458787SruRule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 8558787SruRule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 8619878SwollmanRule Arg 1974 only - Jan 23 0:00 1:00 S 8719878SwollmanRule Arg 1974 only - May 1 0:00 0 - 8819878SwollmanRule Arg 1988 only - Dec 1 0:00 1:00 S 899908Swollman# 90149514Swollman# From Hernan G. Otero (1995-06-26): 919908Swollman# These corrections were contributed by InterSoft Argentina S.A., 929908Swollman# obtaining the data from the: 939908Swollman# Talleres de Hidrografia Naval Argentina 9421217Swollman# (Argentine Naval Hydrography Institute) 9519878SwollmanRule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 9619878SwollmanRule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 979908Swollman# 98149514Swollman# From Hernan G. Otero (1995-06-26): 999908Swollman# From this moment on, the law that mandated the daylight saving 1009908Swollman# time corrections was derogated and no more modifications 1019908Swollman# to the time zones (for daylight saving) are now made. 1029908Swollman# 10358787Sru# From Rives McDow (2000-01-10): 10458787Sru# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 10558787Sru# which did not result in the switch of a time zone, as they stayed 9 hours 10664499Swollman# from the International Date Line. 10764499SwollmanRule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 10864499SwollmanRule Arg 2000 only - Mar Sun>=1 0:00 0 - 10958787Sru# 11058787Sru# From Peter Gradelski via Steffen Thorsen (2000-03-01): 11167578Swollman# We just checked with our Sao Paulo office and they say the government of 11258787Sru# Argentina decided not to become one of the countries that go on or off DST. 11358787Sru# So Buenos Aires should be -3 hours from GMT at all times. 11458787Sru# 115149514Swollman# From Fabian L. Arce Jofre (2000-04-04): 11664499Swollman# The law that claimed DST for Argentina was derogated by President Fernando 11764499Swollman# de la Rua on March 2, 2000, because it would make people spend more energy 11864499Swollman# in the winter time, rather than less. The change took effect on March 3. 11964499Swollman# 12086222Swollman# From Mariano Absatz (2001-06-06): 12186222Swollman# one of the major newspapers here in Argentina said that the 1999 12286222Swollman# Timezone Law (which never was effectively applied) will (would?) be 12386222Swollman# in effect.... The article is at 12486222Swollman# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 12586222Swollman# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 12686222Swollman# 1999-09-17, and published 1999-09-21. The official publication is at: 12786222Swollman# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 12886222Swollman# Regretfully, you have to subscribe (and pay) for the on-line version.... 12986222Swollman# 13086222Swollman# (2001-06-12): 13186222Swollman# the timezone for Argentina will not change next Sunday. 13286222Swollman# Apparently it will do so on Sunday 24th.... 13386222Swollman# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 13486222Swollman# 13586222Swollman# (2001-06-25): 13686222Swollman# Last Friday (yes, the last working day before the date of the change), the 13786222Swollman# Senate annulled the 1999 law that introduced the changes later postponed. 13886222Swollman# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 13986222Swollman# It remains the vote of the Deputies..., but it will be the same.... 14086222Swollman# This kind of things had always been done this way in Argentina. 14186222Swollman# We are still -03:00 all year round in all of the country. 14286222Swollman# 143136638Swollman# From Mariano Absatz (2004-05-21): 144136638Swollman# Today it was officially published that the Province of Mendoza is changing 145136638Swollman# its timezone this winter... starting tomorrow night.... 146136638Swollman# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 147136638Swollman# From Paul Eggert (2004-05-24): 148136638Swollman# It's Law No. 7,210. This change is due to a public power emergency, so for 149136638Swollman# now we'll assume it's for this year only. 15093799Swollman# 151158421Swollman# From Paul Eggert (2006-03-22): 15293799Swollman# <a href="http://www.spicasc.net/horvera.html"> 153158421Swollman# Hora de verano para la Republica Argentina (2003-06-08) 15493799Swollman# </a> says that standard time in Argentina from 1894-10-31 15593799Swollman# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 156158421Swollman# over Shanks & Pottenger. 157136638Swollman# 158136638Swollman# From Mariano Absatz (2004-06-05): 159136638Swollman# These media articles from a major newspaper mostly cover the current state: 160136638Swollman# http://www.lanacion.com.ar/04/05/27/de_604825.asp 161136638Swollman# http://www.lanacion.com.ar/04/05/28/de_605203.asp 162136638Swollman# 163136638Swollman# The following eight (8) provinces pulled clocks back to UTC-04:00 at 164136638Swollman# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 165136638Swollman# Apparently, all nine provinces would go back to UTC-03:00 at the same 166136638Swollman# time in October 17th. 167136638Swollman# 168136638Swollman# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 169136638Swollman# Tierra del Fuego, Tucuman. 170136638Swollman# 171136638Swollman# From Mariano Absatz (2004-06-14): 172136638Swollman# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00 173136638Swollman# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 174136638Swollman# annoyance with the change is much higher than the power savings obtained.... 175136638Swollman# 176136638Swollman# From Gwillim Law (2004-06-14): 177136638Swollman# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 178136638Swollman# "The time change in Tierra del Fuego was a conflicted decision from 179136638Swollman# the start. The government had decreed that the measure would take 180136638Swollman# effect on June 1, but a normative error forced the new time to begin 181136638Swollman# three days earlier, from a Saturday to a Sunday.... 182136638Swollman# Our understanding was that the change was originally scheduled to take place 183136638Swollman# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 184136638Swollman# provinces). Sunday was May 30, only two days earlier. So the article 185136638Swollman# contains a contradiction. I would give more credence to the Saturday/Sunday 186136638Swollman# date than the "three days earlier" phrase, and conclude that Tierra del 187136638Swollman# Fuego set its clocks back at 2004-05-30 00:00. 188136638Swollman# 189136638Swollman# From Steffen Thorsen (2004-10-05): 190136638Swollman# The previous law 7210 which changed the province of Mendoza's time zone 191136638Swollman# back in May have been modified slightly in a new law 7277, which set the 192136638Swollman# new end date to 2004-09-26 (original date was 2004-10-17). 193136638Swollman# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 194136638Swollman# 195136638Swollman# From Mariano Absatz (2004-10-05): 196136638Swollman# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 197136638Swollman# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 198136638Swollman# at midnight between Saturday, July 24th and Sunday, July 25th.... 199136638Swollman# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 200136638Swollman# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 201136638Swollman# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 20293799Swollman 203158421Swollman# Unless otherwise specified, data are from Shanks & Pottenger through 1992, 204158421Swollman# from the IATA otherwise. As noted below, Shanks & Pottenger say that 205136638Swollman# America/Cordoba split into 6 subregions during 1991/1992, but we 20693799Swollman# haven't verified this yet so for now we'll keep it a single region. 20793799Swollman# 2082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 20920094Swollman# 210136638Swollman# Buenos Aires (BA), Capital Federal (CF), 211136638SwollmanZone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 21293799Swollman -4:16:48 - CMT 1920 May # Cordoba Mean Time 21319878Swollman -4:00 - ART 1930 Dec 21458787Sru -4:00 Arg AR%sT 1969 Oct 5 21593799Swollman -3:00 Arg AR%sT 1999 Oct 3 21693799Swollman -4:00 Arg AR%sT 2000 Mar 3 21764499Swollman -3:00 - ART 21820094Swollman# 21920094Swollman# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 220136638Swollman# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB), 221136638Swollman# San Luis (SL), La Pampa (LP), Neuquen (NQ), Rio Negro (RN) 22220094Swollman# 223158421Swollman# Shanks & Pottenger also make the following claims, which we haven't verified: 22493799Swollman# - Formosa switched to -3:00 on 1991-01-07. 22593799Swollman# - Misiones switched to -3:00 on 1990-12-29. 22693799Swollman# - Chaco switched to -3:00 on 1991-01-04. 22793799Swollman# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15, 22893799Swollman# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01. 22993799Swollman# - Santiago del Estero switched to -4:00 on 1991-04-01, 23093799Swollman# then to -3:00 on 1991-04-26. 23193799Swollman# 232136638SwollmanZone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 23393799Swollman -4:16:48 - CMT 1920 May 23420094Swollman -4:00 - ART 1930 Dec 23558787Sru -4:00 Arg AR%sT 1969 Oct 5 23693799Swollman -3:00 Arg AR%sT 1991 Mar 3 23793799Swollman -4:00 - WART 1991 Oct 20 23893799Swollman -3:00 Arg AR%sT 1999 Oct 3 23993799Swollman -4:00 Arg AR%sT 2000 Mar 3 24020094Swollman -3:00 - ART 24120094Swollman# 242136638Swollman# Tucuman (TM) 243136638SwollmanZone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 244136638Swollman -4:16:48 - CMT 1920 May 245136638Swollman -4:00 - ART 1930 Dec 246136638Swollman -4:00 Arg AR%sT 1969 Oct 5 247136638Swollman -3:00 Arg AR%sT 1991 Mar 3 248136638Swollman -4:00 - WART 1991 Oct 20 249136638Swollman -3:00 Arg AR%sT 1999 Oct 3 250136638Swollman -4:00 Arg AR%sT 2000 Mar 3 251136638Swollman -3:00 - ART 2004 Jun 1 252136638Swollman -4:00 - WART 2004 Jun 13 253136638Swollman -3:00 - ART 254136638Swollman# 255136638Swollman# La Rioja (LR) 256136638SwollmanZone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 257136638Swollman -4:16:48 - CMT 1920 May 258136638Swollman -4:00 - ART 1930 Dec 259136638Swollman -4:00 Arg AR%sT 1969 Oct 5 260136638Swollman -3:00 Arg AR%sT 1991 Mar 1 261136638Swollman -4:00 - WART 1991 May 7 262136638Swollman -3:00 Arg AR%sT 1999 Oct 3 263136638Swollman -4:00 Arg AR%sT 2000 Mar 3 264136638Swollman -3:00 - ART 2004 Jun 1 265136638Swollman -4:00 - WART 2004 Jun 20 266136638Swollman -3:00 - ART 267136638Swollman# 268136638Swollman# San Juan (SJ) 269136638SwollmanZone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 270136638Swollman -4:16:48 - CMT 1920 May 271136638Swollman -4:00 - ART 1930 Dec 272136638Swollman -4:00 Arg AR%sT 1969 Oct 5 273136638Swollman -3:00 Arg AR%sT 1991 Mar 1 274136638Swollman -4:00 - WART 1991 May 7 275136638Swollman -3:00 Arg AR%sT 1999 Oct 3 276136638Swollman -4:00 Arg AR%sT 2000 Mar 3 277136638Swollman -3:00 - ART 2004 May 31 278136638Swollman -4:00 - WART 2004 Jul 25 279136638Swollman -3:00 - ART 280136638Swollman# 28120094Swollman# Jujuy (JY) 282136638SwollmanZone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 28393799Swollman -4:16:48 - CMT 1920 May 28420094Swollman -4:00 - ART 1930 Dec 28520094Swollman -4:00 Arg AR%sT 1969 Oct 5 28693799Swollman -3:00 Arg AR%sT 1990 Mar 4 28793799Swollman -4:00 - WART 1990 Oct 28 28893799Swollman -4:00 1:00 WARST 1991 Mar 17 28920094Swollman -4:00 - WART 1991 Oct 6 29093799Swollman -3:00 1:00 ARST 1992 29193799Swollman -3:00 Arg AR%sT 1999 Oct 3 29293799Swollman -4:00 Arg AR%sT 2000 Mar 3 29320094Swollman -3:00 - ART 29420094Swollman# 295149514Swollman# Catamarca (CT), Chubut (CH) 296136638SwollmanZone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 29793799Swollman -4:16:48 - CMT 1920 May 29820094Swollman -4:00 - ART 1930 Dec 29958787Sru -4:00 Arg AR%sT 1969 Oct 5 30093799Swollman -3:00 Arg AR%sT 1991 Mar 3 30193799Swollman -4:00 - WART 1991 Oct 20 30293799Swollman -3:00 Arg AR%sT 1999 Oct 3 30393799Swollman -4:00 Arg AR%sT 2000 Mar 3 304136638Swollman -3:00 - ART 2004 Jun 1 305136638Swollman -4:00 - WART 2004 Jun 20 30620094Swollman -3:00 - ART 30720094Swollman# 30820094Swollman# Mendoza (MZ) 309136638SwollmanZone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 31093799Swollman -4:16:48 - CMT 1920 May 31120094Swollman -4:00 - ART 1930 Dec 31220094Swollman -4:00 Arg AR%sT 1969 Oct 5 31393799Swollman -3:00 Arg AR%sT 1990 Mar 4 31493799Swollman -4:00 - WART 1990 Oct 15 31593799Swollman -4:00 1:00 WARST 1991 Mar 1 31620094Swollman -4:00 - WART 1991 Oct 15 31720094Swollman -4:00 1:00 WARST 1992 Mar 1 31820094Swollman -4:00 - WART 1992 Oct 18 31993799Swollman -3:00 Arg AR%sT 1999 Oct 3 32093799Swollman -4:00 Arg AR%sT 2000 Mar 3 321136638Swollman -3:00 - ART 2004 May 23 322136638Swollman -4:00 - WART 2004 Sep 26 32320094Swollman -3:00 - ART 324136638Swollman# 325136638Swollman# Santa Cruz (SC) 326136638SwollmanZone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 327136638Swollman -4:16:48 - CMT 1920 May # Cordoba Mean Time 328136638Swollman -4:00 - ART 1930 Dec 329136638Swollman -4:00 Arg AR%sT 1969 Oct 5 330136638Swollman -3:00 Arg AR%sT 1999 Oct 3 331136638Swollman -4:00 Arg AR%sT 2000 Mar 3 332136638Swollman -3:00 - ART 2004 Jun 1 333136638Swollman -4:00 - WART 2004 Jun 20 334136638Swollman -3:00 - ART 335136638Swollman# 336136638Swollman# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) 337136638SwollmanZone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 338136638Swollman -4:16:48 - CMT 1920 May # Cordoba Mean Time 339136638Swollman -4:00 - ART 1930 Dec 340136638Swollman -4:00 Arg AR%sT 1969 Oct 5 341136638Swollman -3:00 Arg AR%sT 1999 Oct 3 342136638Swollman -4:00 Arg AR%sT 2000 Mar 3 343136638Swollman -3:00 - ART 2004 May 30 344136638Swollman -4:00 - WART 2004 Jun 20 345136638Swollman -3:00 - ART 3468029Swollman 34714343Swollman# Aruba 34814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 34914343SwollmanZone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 35019878Swollman -4:30 - ANT 1965 # Netherlands Antilles Time 35114343Swollman -4:00 - AST 35214343Swollman 3532742Swollman# Bolivia 3542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3552742SwollmanZone America/La_Paz -4:32:36 - LMT 1890 35686222Swollman -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 35719878Swollman -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 35819878Swollman -4:00 - BOT # Bolivia Time 3592742Swollman 3602742Swollman# Brazil 3612742Swollman 362149514Swollman# From Paul Eggert (1993-11-18): 3632742Swollman# The mayor of Rio recently attempted to change the time zone rules 3642742Swollman# just in his city, in order to leave more summer time for the tourist trade. 3652742Swollman# The rule change lasted only part of the day; 3662742Swollman# the federal government refused to follow the city's rules, and business 3672742Swollman# was in a chaos, so the mayor backed down that afternoon. 3682742Swollman 36920094Swollman# From IATA SSIM (1996-02): 37020094Swollman# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 37120094Swollman# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 37220094Swollman# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 37320094Swollman# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 37420094Swollman# [The last three states are new to this issue of the IATA SSIM.] 37520094Swollman 37620094Swollman# From Gwillim Law (1996-10-07): 37720094Swollman# Geography, history (Tocantins was part of Goias until 1989), and other 37820094Swollman# sources of time zone information lead me to believe that AL, SE, and TO were 37920094Swollman# always in BR1, and so the only change was whether or not they observed DST.... 38020094Swollman# The earliest issue of the SSIM I have is 2/91. Each issue from then until 38120094Swollman# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 38220094Swollman# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 38320094Swollman# (UTC-4).... The other two time zones given for Brazil are BR3, which is 38420094Swollman# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 38520094Swollman# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 38620094Swollman# become part of the state of Pernambuco). The boundary between BR1 and BR2 38720094Swollman# has never been clearly stated. They've simply been called East and West. 38820094Swollman# However, some conclusions can be drawn from another IATA manual: the Airline 38920094Swollman# Coding Directory, which lists close to 400 airports in Brazil. For each 39020094Swollman# airport it gives a time zone which is coded to the SSIM. From that 39120094Swollman# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 39220094Swollman# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 39320094Swollman# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 39420094Swollman 39543014Swollman# From Marcos Tadeu (1998-09-27): 39643014Swollman# <a href="http://pcdsh01.on.br/verao1.html"> 39743014Swollman# Brazilian official page 39843014Swollman# </a> 39975267Swollman 40075267Swollman# From Jesper Norgaard (2000-11-03): 40175267Swollman# [For an official list of which regions in Brazil use which time zones, see:] 40275267Swollman# http://pcdsh01.on.br/Fusbr.htm 40375267Swollman# http://pcdsh01.on.br/Fusbrhv.htm 40475267Swollman 405105196Swollman# From Celso Doria via David Madeo (2002-10-09): 406105196Swollman# The reason for the delay this year has to do with elections in Brazil. 407105196Swollman# 408105196Swollman# Unlike in the United States, elections in Brazil are 100% computerized and 409105196Swollman# the results are known almost immediately. Yesterday, it was the first 410105196Swollman# round of the elections when 115 million Brazilians voted for President, 411105196Swollman# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 412105196Swollman# counting (or re-counting) votes anymore and we know there will be a second 413105196Swollman# round for the Presidency and also for some Governors. The 2nd round will 414105196Swollman# take place on October 27th. 415105196Swollman# 416105196Swollman# The reason why the DST will only begin November 3rd is that the thousands 417105196Swollman# of electoral machines used cannot have their time changed, and since the 418105196Swollman# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 419105196Swollman# the Government decided to postpone DST, instead of changing the Constitution 420105196Swollman# (maybe, for the next elections, it will be possible to change the clock)... 421105196Swollman 422136638Swollman# From Rodrigo Severo (2004-10-04): 423136638Swollman# It's just the biannual change made necessary by the much hyped, supposedly 424136638Swollman# modern Brazilian eletronic voting machines which, apparently, can't deal 425136638Swollman# with a time change between the first and the second rounds of the elections. 426136638Swollman 427172479Sedwin# From Steffen Thorsen (2007-09-20): 428172479Sedwin# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 429172479Sedwin# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 430172479Sedwin 431105196Swollman# From Paul Eggert (2002-10-10): 432105196Swollman# The official decrees referenced below are mostly taken from 43343014Swollman# <a href="http://pcdsh01.on.br/DecHV.html"> 43443014Swollman# Decretos sobre o Horario de Verao no Brasil 435163302Sru# </a>. 43643014Swollman 4372742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 43843543Swollman# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) 43943543Swollman# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10) 44058787SruRule Brazil 1931 only - Oct 3 11:00 1:00 S 44158787SruRule Brazil 1932 1933 - Apr 1 0:00 0 - 44258787SruRule Brazil 1932 only - Oct 3 0:00 1:00 S 44343543Swollman# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) 44443014Swollman# revoked DST. 44543543Swollman# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) 44643543Swollman# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13) 44758787SruRule Brazil 1949 1952 - Dec 1 0:00 1:00 S 44858787SruRule Brazil 1950 only - Apr 16 1:00 0 - 44958787SruRule Brazil 1951 1952 - Apr 1 0:00 0 - 45043543Swollman# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) 45158787SruRule Brazil 1953 only - Mar 1 0:00 0 - 45243543Swollman# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) 45343014Swollman# revoked DST. 45443543Swollman# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18) 45543543Swollman# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 45643543Swollman# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 45743543Swollman# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03) 45843543Swollman# extended the above decree to all of the national territory on 12-09. 45958787SruRule Brazil 1963 only - Dec 9 0:00 1:00 S 46043543Swollman# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25) 46143543Swollman# extended summer time by one day to 1964-03-01 00:00 (start of school). 46258787SruRule Brazil 1964 only - Mar 1 0:00 0 - 46343543Swollman# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) 46458787SruRule Brazil 1965 only - Jan 31 0:00 1:00 S 46558787SruRule Brazil 1965 only - Mar 31 0:00 0 - 46643543Swollman# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) 46758787SruRule Brazil 1965 only - Dec 1 0:00 1:00 S 46843543Swollman# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) 46958787SruRule Brazil 1966 1968 - Mar 1 0:00 0 - 47058787SruRule Brazil 1966 1967 - Nov 1 0:00 1:00 S 47143543Swollman# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) 47243543Swollman# revoked DST. 47343543Swollman# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27) 47458787SruRule Brazil 1985 only - Nov 2 0:00 1:00 S 47543543Swollman# Decree 92,310 (1986-01-21) 47643543Swollman# Decree 92,463 (1986-03-13) 47758787SruRule Brazil 1986 only - Mar 15 0:00 0 - 47843543Swollman# Decree 93,316 (1986-10-01) 47958787SruRule Brazil 1986 only - Oct 25 0:00 1:00 S 48058787SruRule Brazil 1987 only - Feb 14 0:00 0 - 48143543Swollman# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) 48258787SruRule Brazil 1987 only - Oct 25 0:00 1:00 S 48358787SruRule Brazil 1988 only - Feb 7 0:00 0 - 48443543Swollman# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12) 48543543Swollman# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 48658787SruRule Brazil 1988 only - Oct 16 0:00 1:00 S 48758787SruRule Brazil 1989 only - Jan 29 0:00 0 - 48843543Swollman# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21) 48943543Swollman# with the same exceptions 49058787SruRule Brazil 1989 only - Oct 15 0:00 1:00 S 49158787SruRule Brazil 1990 only - Feb 11 0:00 0 - 49243543Swollman# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17) 49343543Swollman# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 49443543Swollman# Decree 99,629 (1990-10-19) adds BA, MT. 49558787SruRule Brazil 1990 only - Oct 21 0:00 1:00 S 49658787SruRule Brazil 1991 only - Feb 17 0:00 0 - 49743543Swollman# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25) 49843543Swollman# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 49958787SruRule Brazil 1991 only - Oct 20 0:00 1:00 S 50058787SruRule Brazil 1992 only - Feb 9 0:00 0 - 50143543Swollman# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16) 50243543Swollman# adopted by same states. 50358787SruRule Brazil 1992 only - Oct 25 0:00 1:00 S 50458787SruRule Brazil 1993 only - Jan 31 0:00 0 - 50543014Swollman# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) 50643543Swollman# adopted by same states, plus AM. 507136638Swollman# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22; 508136638Swollman# web page corrected 2004-01-07) adopted by same states, minus AM. 50943543Swollman# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) 510136638Swollman# adopted by same states, plus MT and TO. 51143543Swollman# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13) 51243543Swollman# adds AL, SE. 51358787SruRule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 51458787SruRule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 51558787SruRule Brazil 1996 only - Feb 11 0:00 0 - 51643543Swollman# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04) 51743543Swollman# adopted by same states, minus AL, SE. 51858787SruRule Brazil 1996 only - Oct 6 0:00 1:00 S 51958787SruRule Brazil 1997 only - Feb 16 0:00 0 - 520149514Swollman# From Daniel C. Sobral (1998-02-12): 52143014Swollman# In 1997, the DS began on October 6. The stated reason was that 52243014Swollman# because international television networks ignored Brazil's policy on DS, 52343014Swollman# they bought the wrong times on satellite for coverage of Pope's visit. 52443014Swollman# This year, the ending date of DS was postponed to March 1 52543014Swollman# to help dealing with the shortages of electric power. 52643014Swollman# 52743543Swollman# Decree 2,317 (1997-09-04), adopted by same states. 52858787SruRule Brazil 1997 only - Oct 6 0:00 1:00 S 52943543Swollman# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> 53043014Swollman# (1998-02-10) 53158787SruRule Brazil 1998 only - Mar 1 0:00 0 - 53243543Swollman# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11) 53358787Sru# adopted by the same states as before. 53458787SruRule Brazil 1998 only - Oct 11 0:00 1:00 S 53558787SruRule Brazil 1999 only - Feb 21 0:00 0 - 53658787Sru# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> 53758787Sru# (1999-08-23) adopted by same states. 53858787Sru# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30) 53967578Swollman# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 54067578SwollmanRule Brazil 1999 only - Oct 3 0:00 1:00 S 54167578SwollmanRule Brazil 2000 only - Feb 27 0:00 0 - 54267578Swollman# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) 54367578Swollman# adopted by the same states as before. 54475267Swollman# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) 54575267Swollman# repeals DST in PE and RR, effective 2000-10-15 00:00. 54675267Swollman# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) 54775267Swollman# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 54886222Swollman# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> 54986222Swollman# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 550105196SwollmanRule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 551163302SruRule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 552105196Swollman# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 553105196Swollman# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a> 554105196SwollmanRule Brazil 2002 only - Nov 3 0:00 1:00 S 555121098Swollman# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 556121098Swollman# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a> 557136638SwollmanRule Brazil 2003 only - Oct 19 0:00 1:00 S 558136638Swollman# Decree 5,223 (2004-10-01) reestablishes DST in MT. 559136638Swollman# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm"></a> 560136638SwollmanRule Brazil 2004 only - Nov 2 0:00 1:00 S 561153670Swollman# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19), 562153670Swollman# adopted by the same states as before. 563163302SruRule Brazil 2005 only - Oct 16 0:00 1:00 S 564172479Sedwin# Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03), 565172479Sedwin# adopted by the same states as before. 566172479SedwinRule Brazil 2006 only - Nov 5 0:00 1:00 S 567172479SedwinRule Brazil 2007 only - Feb 25 0:00 0 - 568172479Sedwin# (Decree number not yet known) 569172479Sedwin# http://www.brasil.gov.br/noticias/ultimas_noticias/horario_verao070920/ 570172479Sedwin# (2007-09-20) after a heads-up from Steffen Thorsen: 571172479SedwinRule Brazil 2007 max - Oct Sun>=8 0:00 1:00 S 572172479SedwinRule Brazil 2008 max - Feb Sun>=15 0:00 0 - 573121098Swollman# The latest ruleset listed above says that the following states observe DST: 574136638Swollman# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 575172479Sedwin# For dates after mid-2008, the above rules with TO="max" are guesses 57658787Sru# and are quite possibly wrong, but are more likely than no DST at all. 57720094Swollman 57843014Swollman 5792742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 58020094Swollman# 581136638Swollman# Fernando de Noronha (administratively part of PE) 5822742SwollmanZone America/Noronha -2:09:40 - LMT 1914 58358787Sru -2:00 Brazil FN%sT 1990 Sep 17 584136638Swollman -2:00 - FNT 1999 Sep 30 585136638Swollman -2:00 Brazil FN%sT 2000 Oct 15 586136638Swollman -2:00 - FNT 2001 Sep 13 587136638Swollman -2:00 Brazil FN%sT 2002 Oct 1 58858787Sru -2:00 - FNT 589136638Swollman# Other Atlantic islands have no permanent settlement. 590136638Swollman# These include Trindade and Martin Vaz (administratively part of ES), 591136638Swollman# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE). 592136638Swollman# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 593136638Swollman# it also included the Penedos. 59420094Swollman# 59558787Sru# Amapa (AP), east Para (PA) 59675267Swollman# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. 597121098Swollman# The division between east and west Para is the river Xingu. 598121098Swollman# In the north a very small part from the river Javary (now Jari I guess, 599121098Swollman# the border with Amapa) to the Amazon, then to the Xingu. 60043543SwollmanZone America/Belem -3:13:56 - LMT 1914 60158787Sru -3:00 Brazil BR%sT 1988 Sep 12 60258787Sru -3:00 - BRT 60343543Swollman# 60458787Sru# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), 60575267Swollman# Paraiba (PB) 60620094SwollmanZone America/Fortaleza -2:34:00 - LMT 1914 60758787Sru -3:00 Brazil BR%sT 1990 Sep 17 60858787Sru -3:00 - BRT 1999 Sep 30 60975267Swollman -3:00 Brazil BR%sT 2000 Oct 22 61086222Swollman -3:00 - BRT 2001 Sep 13 611105196Swollman -3:00 Brazil BR%sT 2002 Oct 1 612105196Swollman -3:00 - BRT 61320094Swollman# 61475267Swollman# Pernambuco (PE) (except Atlantic islands) 61575267SwollmanZone America/Recife -2:19:36 - LMT 1914 61675267Swollman -3:00 Brazil BR%sT 1990 Sep 17 61775267Swollman -3:00 - BRT 1999 Sep 30 61875267Swollman -3:00 Brazil BR%sT 2000 Oct 15 61986222Swollman -3:00 - BRT 2001 Sep 13 620105196Swollman -3:00 Brazil BR%sT 2002 Oct 1 621105196Swollman -3:00 - BRT 62275267Swollman# 62358787Sru# Tocantins (TO) 62443543SwollmanZone America/Araguaina -3:12:48 - LMT 1914 62558787Sru -3:00 Brazil BR%sT 1990 Sep 17 62658787Sru -3:00 - BRT 1995 Sep 14 627121098Swollman -3:00 Brazil BR%sT 2003 Sep 24 628121098Swollman -3:00 - BRT 62920094Swollman# 63058787Sru# Alagoas (AL), Sergipe (SE) 63143543SwollmanZone America/Maceio -2:22:52 - LMT 1914 63258787Sru -3:00 Brazil BR%sT 1990 Sep 17 63358787Sru -3:00 - BRT 1995 Oct 13 63458787Sru -3:00 Brazil BR%sT 1996 Sep 4 63558787Sru -3:00 - BRT 1999 Sep 30 63675267Swollman -3:00 Brazil BR%sT 2000 Oct 22 63786222Swollman -3:00 - BRT 2001 Sep 13 638105196Swollman -3:00 Brazil BR%sT 2002 Oct 1 639105196Swollman -3:00 - BRT 64043543Swollman# 641121098Swollman# Bahia (BA) 642121098Swollman# There are too many Salvadors elsewhere, so use America/Bahia instead 643121098Swollman# of America/Salvador. 644121098SwollmanZone America/Bahia -2:34:04 - LMT 1914 645121098Swollman -3:00 Brazil BR%sT 2003 Sep 24 646121098Swollman -3:00 - BRT 647121098Swollman# 648121098Swollman# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), 64958787Sru# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), 65058787Sru# Santa Catarina (SC), Rio Grande do Sul (RS) 6512742SwollmanZone America/Sao_Paulo -3:06:28 - LMT 1914 65258787Sru -3:00 Brazil BR%sT 1963 Oct 23 00:00 65358787Sru -3:00 1:00 BRST 1964 65458787Sru -3:00 Brazil BR%sT 65520094Swollman# 656121098Swollman# Mato Grosso do Sul (MS) 657121098SwollmanZone America/Campo_Grande -3:38:28 - LMT 1914 65858787Sru -4:00 Brazil AM%sT 65920094Swollman# 660121098Swollman# Mato Grosso (MT) 661121098SwollmanZone America/Cuiaba -3:44:20 - LMT 1914 662121098Swollman -4:00 Brazil AM%sT 2003 Sep 24 663138323Swollman -4:00 - AMT 2004 Oct 1 664136638Swollman -4:00 Brazil AM%sT 665121098Swollman# 66658787Sru# west Para (PA), Rondonia (RO) 66775267Swollman# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. 66843543SwollmanZone America/Porto_Velho -4:15:36 - LMT 1914 66958787Sru -4:00 Brazil AM%sT 1988 Sep 12 67058787Sru -4:00 - AMT 67143543Swollman# 67258787Sru# Roraima (RR) 67358787SruZone America/Boa_Vista -4:02:40 - LMT 1914 67458787Sru -4:00 Brazil AM%sT 1988 Sep 12 67558787Sru -4:00 - AMT 1999 Sep 30 67675267Swollman -4:00 Brazil AM%sT 2000 Oct 15 67775267Swollman -4:00 - AMT 67858787Sru# 67975267Swollman# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto 680121098Swollman# The great circle line from Tabatinga to Porto Acre divides 681121098Swollman# east from west Amazonas. 6822742SwollmanZone America/Manaus -4:00:04 - LMT 1914 68358787Sru -4:00 Brazil AM%sT 1988 Sep 12 68458787Sru -4:00 - AMT 1993 Sep 28 68558787Sru -4:00 Brazil AM%sT 1994 Sep 22 68658787Sru -4:00 - AMT 68720094Swollman# 68875267Swollman# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 68975267Swollman# Eirunepe, Envira, Ipixuna 69075267SwollmanZone America/Eirunepe -4:39:28 - LMT 1914 69175267Swollman -5:00 Brazil AC%sT 1988 Sep 12 69275267Swollman -5:00 - ACT 1993 Sep 28 69375267Swollman -5:00 Brazil AC%sT 1994 Sep 22 69475267Swollman -5:00 - ACT 69575267Swollman# 69658787Sru# Acre (AC) 69775267SwollmanZone America/Rio_Branco -4:31:12 - LMT 1914 69858787Sru -5:00 Brazil AC%sT 1988 Sep 12 69958787Sru -5:00 - ACT 7002742Swollman 7012742Swollman 7022742Swollman# Chile 7032742Swollman 70414343Swollman# From Eduardo Krell (1995-10-19): 70514343Swollman# The law says to switch to DST at midnight [24:00] on the second SATURDAY 70614343Swollman# of October.... The law is the same for March and October. 70743014Swollman# (1998-09-29): 70843014Swollman# Because of the drought this year, the government decided to go into 70943014Swollman# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 71043014Swollman# (unless there's another dry season next year, I guess). 7112742Swollman 71258787Sru# From Julio I. Pacheco Troncoso (1999-03-18): 71358787Sru# Because of the same drought, the government decided to end DST later, 71458787Sru# on April 3, (one-time change). 71558787Sru 716169811Swollman# From Oscar van Vlijmen (2006-10-08): 717169811Swollman# http://www.horaoficial.cl/cambio.htm 71875267Swollman 719169811Swollman# From Jesper Norgaard Welen (2006-10-08): 720169811Swollman# I think that there are some obvious mistakes in the suggested link 721169811Swollman# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4 722169811Swollman# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15 723169811Swollman# (they should have been 1990-09-15 and 1990-09-16 respectively), but 724169811Swollman# anyhow it clears up some doubts too. 72575267Swollman 726169811Swollman# From Paul Eggert (2006-12-27): 727169811Swollman# The following data for Chile and America/Santiago are from 728169811Swollman# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by 729169811Swollman# Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks 730169811Swollman# & Pottenger, except with DST transitions after 1932 cloned from 731169811Swollman# America/Santiago. The pre-1980 Pacific/Easter data are dubious, 732169811Swollman# but we have no other source. 733114173Swollman 7342742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 735169811SwollmanRule Chile 1927 1932 - Sep 1 0:00 1:00 S 73658787SruRule Chile 1928 1932 - Apr 1 0:00 0 - 737169811SwollmanRule Chile 1942 only - Jun 1 4:00u 0 - 738169811SwollmanRule Chile 1942 only - Aug 1 5:00u 1:00 S 739169811SwollmanRule Chile 1946 only - Jul 15 4:00u 1:00 S 740169811SwollmanRule Chile 1946 only - Sep 1 3:00u 0:00 - 741169811SwollmanRule Chile 1947 only - Apr 1 4:00u 0 - 742169811SwollmanRule Chile 1968 only - Nov 3 4:00u 1:00 S 743169811SwollmanRule Chile 1969 only - Mar 30 3:00u 0 - 744169811SwollmanRule Chile 1969 only - Nov 23 4:00u 1:00 S 745169811SwollmanRule Chile 1970 only - Mar 29 3:00u 0 - 746169811SwollmanRule Chile 1971 only - Mar 14 3:00u 0 - 747169811SwollmanRule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S 748169811SwollmanRule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 749169811SwollmanRule Chile 1973 only - Sep 30 4:00u 1:00 S 750169811SwollmanRule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S 751169811SwollmanRule Chile 1987 only - Apr 12 3:00u 0 - 752169811SwollmanRule Chile 1988 1989 - Mar Sun>=9 3:00u 0 - 753169811SwollmanRule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S 754169811SwollmanRule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S 755169811SwollmanRule Chile 1990 only - Mar 18 3:00u 0 - 756169811SwollmanRule Chile 1990 only - Sep 16 4:00u 1:00 S 757169811SwollmanRule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 758169811SwollmanRule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S 759169811SwollmanRule Chile 1997 only - Mar 30 3:00u 0 - 760169811SwollmanRule Chile 1998 only - Mar Sun>=9 3:00u 0 - 76175267SwollmanRule Chile 1998 only - Sep 27 4:00u 1:00 S 76275267SwollmanRule Chile 1999 only - Apr 4 3:00u 0 - 76375267SwollmanRule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S 76475267SwollmanRule Chile 2000 max - Mar Sun>=9 3:00u 0 - 765169811Swollman# IATA SSIM anomalies: (1992-02) says 1992-03-14; 76658787Sru# (1996-09) says 1998-03-08. Ignore these. 7672742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 768169811SwollmanZone America/Santiago -4:42:46 - LMT 1890 769169811Swollman -4:42:46 - SMT 1910 # Santiago Mean Time 770169811Swollman -5:00 - CLT 1916 Jul 1 # Chile Time 771169811Swollman -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time 772169811Swollman -4:00 - CLT 1919 Jul 1 # Chile Time 773169811Swollman -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time 774169811Swollman -5:00 Chile CL%sT 1947 May 22 # Chile Time 77519878Swollman -4:00 Chile CL%sT 776169811SwollmanZone Pacific/Easter -7:17:44 - LMT 1890 777169811Swollman -7:17:28 - EMT 1932 Sep # Easter Mean Time 778158421Swollman -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time 77919878Swollman -6:00 Chile EAS%sT 7802742Swollman# 78186222Swollman# Sala y Gomez Island is like Pacific/Easter. 78286222Swollman# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, 78386222Swollman# San Felix, and Antarctic bases, are like America/Santiago. 7842742Swollman 7852742Swollman# Colombia 78620094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 787158421SwollmanRule CO 1992 only - May 3 0:00 1:00 S 788158421SwollmanRule CO 1993 only - Apr 4 0:00 0 - 7892742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 7902742SwollmanZone America/Bogota -4:56:20 - LMT 1884 Mar 13 79119878Swollman -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 79220094Swollman -5:00 CO CO%sT # Colombia Time 7932742Swollman# Malpelo, Providencia, San Andres 7942742Swollman# no information; probably like America/Bogota 7952742Swollman 7962742Swollman# Curacao 797158421Swollman# 798169811Swollman# From Paul Eggert (2006-03-22): 799158421Swollman# Shanks & Pottenger say that The Bottom and Philipsburg have been at 800158421Swollman# -4:00 since standard time was introduced on 1912-03-02; and that 801158421Swollman# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from 802158421Swollman# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say 803158421Swollman# Saba Island has been like Curacao. 804169811Swollman# This all predates our 1970 cutoff, though. 805158421Swollman# 806158421Swollman# By July 2007 Curacao and St Maarten are planned to become 807158421Swollman# associated states within the Netherlands, much like Aruba; 808158421Swollman# Bonaire, Saba and St Eustatius would become directly part of the 809158421Swollman# Netherlands as Kingdom Islands. This won't affect their time zones 810158421Swollman# though, as far as we know. 811169811Swollman# 8122742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8132742SwollmanZone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 81419878Swollman -4:30 - ANT 1965 # Netherlands Antilles Time 8152742Swollman -4:00 - AST 8162742Swollman 8172742Swollman# Ecuador 818169811Swollman# 819169811Swollman# From Paul Eggert (2007-03-04): 820169811Swollman# Apparently Ecuador had a failed experiment with DST in 1992. 821169811Swollman# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and 822169811Swollman# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both 823169811Swollman# talk about "hora Sixto". Leave this alone for now, as we have no data. 824169811Swollman# 8252742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8262742SwollmanZone America/Guayaquil -5:19:20 - LMT 1890 82719878Swollman -5:14:00 - QMT 1931 # Quito Mean Time 82819878Swollman -5:00 - ECT # Ecuador Time 8292742SwollmanZone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 83019878Swollman -5:00 - ECT 1986 83119878Swollman -6:00 - GALT # Galapagos Time 8322742Swollman 8332742Swollman# Falklands 83475267Swollman 835158421Swollman# From Paul Eggert (2006-03-22): 836158421Swollman# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 837158421Swollman# the IATA gives 1996-09-08. Go with Shanks & Pottenger. 83875267Swollman 83975267Swollman# From Falkland Islands Government Office, London (2001-01-22) 84075267Swollman# via Jesper Norgaard: 84175267Swollman# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 84275267Swollman# April 2001 and advance one hour to summer time at 2 am on Sunday 2 84375267Swollman# September. It is anticipated that the clocks will revert back at 2 84475267Swollman# am on Sunday 21 April 2002 and advance to summer time at 2 am on 84575267Swollman# Sunday 1 September. 84675267Swollman 84775267Swollman# From Rives McDow (2001-02-13): 84875267Swollman# 84975267Swollman# I have communicated several times with people there, and the last 85075267Swollman# time I had communications that was helpful was in 1998. Here is 85175267Swollman# what was said then: 85275267Swollman# 85375267Swollman# "The general rule was that Stanley used daylight saving and the Camp 85475267Swollman# did not. However for various reasons many people in the Camp have 85575267Swollman# started to use daylight saving (known locally as 'Stanley Time') 85675267Swollman# There is no rule as to who uses daylight saving - it is a matter of 85775267Swollman# personal choice and so it is impossible to draw a map showing who 85875267Swollman# uses it and who does not. Any list would be out of date as soon as 85975267Swollman# it was produced. This year daylight saving ended on April 18/19th 86075267Swollman# and started again on September 12/13th. I do not know what the rule 86175267Swollman# is, but can find out if you like. We do not change at the same time 86275267Swollman# as UK or Chile." 86375267Swollman# 86475267Swollman# I did have in my notes that the rule was "Second Saturday in Sep at 86575267Swollman# 0:00 until third Saturday in Apr at 0:00". I think that this does 86675267Swollman# not agree in some cases with Shanks; is this true? 86775267Swollman# 86875267Swollman# Also, there is no mention in the list that some areas in the 86975267Swollman# Falklands do not use DST. I have found in my communications there 87075267Swollman# that these areas are on the western half of East Falkland and all of 87175267Swollman# West Falkland. Stanley is the only place that consistently observes 87275267Swollman# DST. Again, as in other places in the world, the farmers don't like 87375267Swollman# it. West Falkland is almost entirely sheep farmers. 87475267Swollman# 87575267Swollman# I know one lady there that keeps a list of which farm keeps DST and 87675267Swollman# which doesn't each year. She runs a shop in Stanley, and says that 87775267Swollman# the list changes each year. She uses it to communicate to her 87875267Swollman# customers, catching them when they are home for lunch or dinner. 87975267Swollman 88075267Swollman# From Paul Eggert (2001-03-05): 88175267Swollman# For now, we'll just record the time in Stanley, since we have no 88275267Swollman# better info. 88375267Swollman 8842742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 88519878SwollmanRule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 88619878SwollmanRule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 88719878SwollmanRule Falk 1939 only - Oct 1 0:00 1:00 S 88819878SwollmanRule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 88919878SwollmanRule Falk 1943 only - Jan 1 0:00 0 - 89019878SwollmanRule Falk 1983 only - Sep lastSun 0:00 1:00 S 89119878SwollmanRule Falk 1984 1985 - Apr lastSun 0:00 0 - 89219878SwollmanRule Falk 1984 only - Sep 16 0:00 1:00 S 89375267SwollmanRule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 89475267SwollmanRule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 89575267SwollmanRule Falk 2001 max - Apr Sun>=15 2:00 0 - 89675267SwollmanRule Falk 2001 max - Sep Sun>=1 2:00 1:00 S 8972742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8982742SwollmanZone Atlantic/Stanley -3:51:24 - LMT 1890 89919878Swollman -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 90019878Swollman -4:00 Falk FK%sT 1983 May # Falkland Is Time 90119878Swollman -3:00 Falk FK%sT 1985 Sep 15 90219878Swollman -4:00 Falk FK%sT 9032742Swollman 9042742Swollman# French Guiana 9052742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9062742SwollmanZone America/Cayenne -3:29:20 - LMT 1911 Jul 90719878Swollman -4:00 - GFT 1967 Oct # French Guiana Time 90819878Swollman -3:00 - GFT 9092742Swollman 9102742Swollman# Guyana 9112742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9122742SwollmanZone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 91319878Swollman -3:45 - GBGT 1966 May 26 # Br Guiana Time 91419878Swollman -3:45 - GYT 1975 Jul 31 # Guyana Time 91520094Swollman -3:00 - GYT 1991 91620094Swollman# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 91720094Swollman -4:00 - GYT 9182742Swollman 9192742Swollman# Paraguay 920158421Swollman# From Paul Eggert (2006-03-22): 921158421Swollman# Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00, 922158421Swollman# and autumn transitions are from 00:00 -> 23:00. Go with pre-1999 92358787Sru# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 9242742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 92558787SruRule Para 1975 1988 - Oct 1 0:00 1:00 S 92619878SwollmanRule Para 1975 1978 - Mar 1 0:00 0 - 92758787SruRule Para 1979 1991 - Apr 1 0:00 0 - 92819878SwollmanRule Para 1989 only - Oct 22 0:00 1:00 S 92920094SwollmanRule Para 1990 only - Oct 1 0:00 1:00 S 93020094SwollmanRule Para 1991 only - Oct 6 0:00 1:00 S 93120094SwollmanRule Para 1992 only - Mar 1 0:00 0 - 93220094SwollmanRule Para 1992 only - Oct 5 0:00 1:00 S 93320094SwollmanRule Para 1993 only - Mar 31 0:00 0 - 93430711SwollmanRule Para 1993 1995 - Oct 1 0:00 1:00 S 93520094SwollmanRule Para 1994 1995 - Feb lastSun 0:00 0 - 93658787SruRule Para 1996 only - Mar 1 0:00 0 - 93775267Swollman# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 93867578Swollman# From Steffen Thorsen (2000-10-02): 93967578Swollman# I have three independent reports that Paraguay changed to DST this Sunday 94067578Swollman# (10-01). 94175267Swollman# 94275267Swollman# Translated by Gwillim Law (2001-02-27) from 94375267Swollman# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> 94475267Swollman# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) 94575267Swollman# </a>: 94675267Swollman# Starting at 0:00 today, the clock will be set forward 60 minutes, in 94775267Swollman# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 94875267Swollman# system has been operating for several years. Formerly there was a separate 94975267Swollman# decree each year; the new law has the same effect, but permanently. Every 95075267Swollman# year, the time will change on the first Sunday of October; likewise, the 95175267Swollman# clock will be set back on the first Sunday of March. 95275267Swollman# 95393799SwollmanRule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 954158421Swollman# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 95575267SwollmanRule Para 1997 only - Feb lastSun 0:00 0 - 956158421Swollman# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 95775267Swollman# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 95893799SwollmanRule Para 1998 2001 - Mar Sun>=1 0:00 0 - 95993799Swollman# From Rives McDow (2002-02-28): 96093799Swollman# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 96193799Swollman# dst method to be from the first Sunday in September to the first Sunday in 96293799Swollman# April. 963149514SwollmanRule Para 2002 2004 - Apr Sun>=1 0:00 0 - 964149514SwollmanRule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 965149514Swollman# 966149514Swollman# From Jesper Norgaard Welen (2005-01-02): 967149514Swollman# There are several sources that claim that Paraguay made 968149514Swollman# a timezone rule change in autumn 2004. 969149514Swollman# From Steffen Thorsen (2005-01-05): 970169811Swollman# Decree 1,867 (2004-03-05) 971169811Swollman# From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13) 972169811Swollman# <http://www.presidencia.gov.py/decretos/D1867.pdf> 973149514SwollmanRule Para 2004 max - Oct Sun>=15 0:00 1:00 S 974149514SwollmanRule Para 2005 max - Mar Sun>=8 0:00 0 - 97575267Swollman 9762742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9772742SwollmanZone America/Asuncion -3:50:40 - LMT 1890 97819878Swollman -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 97919878Swollman -4:00 - PYT 1972 Oct # Paraguay Time 98019878Swollman -3:00 - PYT 1974 Apr 98119878Swollman -4:00 Para PY%sT 9822742Swollman 9832742Swollman# Peru 984136638Swollman# 985136638Swollman# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net"> 986136638Swollman# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a> 987149514Swollman# When we were in Peru in 1985-1986, they apparently switched over 988136638Swollman# sometime between December 29 and January 3 while we were on the Amazon. 989136638Swollman# 990158421Swollman# From Paul Eggert (2006-03-22): 991158421Swollman# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 992136638Swollman 9932742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 99419878SwollmanRule Peru 1938 only - Jan 1 0:00 1:00 S 99519878SwollmanRule Peru 1938 only - Apr 1 0:00 0 - 99619878SwollmanRule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 99719878SwollmanRule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 998136638SwollmanRule Peru 1986 1987 - Jan 1 0:00 1:00 S 999136638SwollmanRule Peru 1986 1987 - Apr 1 0:00 0 - 100019878SwollmanRule Peru 1990 only - Jan 1 0:00 1:00 S 100119878SwollmanRule Peru 1990 only - Apr 1 0:00 0 - 1002158421Swollman# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 100358787SruRule Peru 1994 only - Jan 1 0:00 1:00 S 100458787SruRule Peru 1994 only - Apr 1 0:00 0 - 10052742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10062742SwollmanZone America/Lima -5:08:12 - LMT 1890 100786222Swollman -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 100819878Swollman -5:00 Peru PE%sT # Peru Time 10092742Swollman 10102742Swollman# South Georgia 10112742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10122742SwollmanZone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 101319878Swollman -2:00 - GST # South Georgia Time 10142742Swollman 10152742Swollman# South Sandwich Is 101658787Sru# uninhabited; scientific personnel have wintered 10172742Swollman 10182742Swollman# Suriname 10192742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10202742SwollmanZone America/Paramaribo -3:40:40 - LMT 1911 10212742Swollman -3:40:52 - PMT 1935 # Paramaribo Mean Time 10222742Swollman -3:40:36 - PMT 1945 Oct # The capital moved? 102319878Swollman -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 102419878Swollman -3:30 - SRT 1984 Oct # Suriname Time 102519878Swollman -3:00 - SRT 10262742Swollman 10272742Swollman# Trinidad and Tobago 10282742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10292742SwollmanZone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 10302742Swollman -4:00 - AST 10312742Swollman 10322742Swollman# Uruguay 1033149514Swollman# From Paul Eggert (1993-11-18): 10342742Swollman# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1035158421Swollman# From Shanks & Pottenger: 10362742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1037158421Swollman# Whitman gives 1923 Oct 1; go with Shanks & Pottenger. 103819878SwollmanRule Uruguay 1923 only - Oct 2 0:00 0:30 HS 103919878SwollmanRule Uruguay 1924 1926 - Apr 1 0:00 0 - 104019878SwollmanRule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 104119878SwollmanRule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1042158421Swollman# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman. 104319878SwollmanRule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 104419878SwollmanRule Uruguay 1936 only - Nov 1 0:00 0:30 HS 104519878SwollmanRule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1046158421Swollman# Whitman gives 1937 Oct 3; go with Shanks & Pottenger. 104719878SwollmanRule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 10482742Swollman# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1049158421Swollman# and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger. 1050158421SwollmanRule Uruguay 1941 only - Aug 1 0:00 0:30 HS 1051158421SwollmanRule Uruguay 1942 only - Jan 1 0:00 0 - 105219878SwollmanRule Uruguay 1942 only - Dec 14 0:00 1:00 S 105319878SwollmanRule Uruguay 1943 only - Mar 14 0:00 0 - 105419878SwollmanRule Uruguay 1959 only - May 24 0:00 1:00 S 105519878SwollmanRule Uruguay 1959 only - Nov 15 0:00 0 - 105619878SwollmanRule Uruguay 1960 only - Jan 17 0:00 1:00 S 105719878SwollmanRule Uruguay 1960 only - Mar 6 0:00 0 - 105819878SwollmanRule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 105919878SwollmanRule Uruguay 1965 only - Sep 26 0:00 0 - 106019878SwollmanRule Uruguay 1966 1967 - Oct 31 0:00 0 - 106119878SwollmanRule Uruguay 1968 1970 - May 27 0:00 0:30 HS 106219878SwollmanRule Uruguay 1968 1970 - Dec 2 0:00 0 - 106319878SwollmanRule Uruguay 1972 only - Apr 24 0:00 1:00 S 106419878SwollmanRule Uruguay 1972 only - Aug 15 0:00 0 - 106519878SwollmanRule Uruguay 1974 only - Mar 10 0:00 0:30 HS 106619878SwollmanRule Uruguay 1974 only - Dec 22 0:00 1:00 S 106719878SwollmanRule Uruguay 1976 only - Oct 1 0:00 0 - 106819878SwollmanRule Uruguay 1977 only - Dec 4 0:00 1:00 S 106919878SwollmanRule Uruguay 1978 only - Apr 1 0:00 0 - 107019878SwollmanRule Uruguay 1979 only - Oct 1 0:00 1:00 S 107119878SwollmanRule Uruguay 1980 only - May 1 0:00 0 - 107219878SwollmanRule Uruguay 1987 only - Dec 14 0:00 1:00 S 107319878SwollmanRule Uruguay 1988 only - Mar 14 0:00 0 - 107419878SwollmanRule Uruguay 1988 only - Dec 11 0:00 1:00 S 107519878SwollmanRule Uruguay 1989 only - Mar 12 0:00 0 - 107619878SwollmanRule Uruguay 1989 only - Oct 29 0:00 1:00 S 1077158421Swollman# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2, 107858787Sru# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 107920094SwollmanRule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 108020094SwollmanRule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 108130711SwollmanRule Uruguay 1992 only - Oct 18 0:00 1:00 S 108220094SwollmanRule Uruguay 1993 only - Feb 28 0:00 0 - 1083136638Swollman# From Eduardo Cota (2004-09-20): 1084136638Swollman# The uruguayan government has decreed a change in the local time.... 1085136638Swollman# http://www.presidencia.gub.uy/decretos/2004091502.htm 1086149514SwollmanRule Uruguay 2004 only - Sep 19 0:00 1:00 S 1087149514Swollman# From Steffen Thorsen (2005-03-11): 1088149514Swollman# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1089149514Swollman# save energy ... it was postponed two weeks.... 1090149514Swollman# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1091149514SwollmanRule Uruguay 2005 only - Mar 27 2:00 0 - 1092153670Swollman# From Eduardo Cota (2005-09-27): 1093153670Swollman# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1094153670Swollman# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1095153670Swollman# 02:00 local time, official time in Uruguay will be at GMT -2. 1096153670SwollmanRule Uruguay 2005 only - Oct 9 2:00 1:00 S 1097153670SwollmanRule Uruguay 2006 only - Mar 12 2:00 0 - 1098163302Sru# From Jesper Norgaard Welen (2006-09-06): 1099163302Sru# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF 1100163302SruRule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S 1101163302SruRule Uruguay 2007 max - Mar Sun>=8 2:00 0 - 11022742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 11032742SwollmanZone America/Montevideo -3:44:44 - LMT 1898 Jun 28 110419878Swollman -3:44:44 - MMT 1920 May 1 # Montevideo MT 110519878Swollman -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 110619878Swollman -3:00 Uruguay UY%sT 11072742Swollman 11082742Swollman# Venezuela 1109172479Sedwin# 1110174242Sedwin# From John Stainforth (2007-11-28): 1111174242Sedwin# ... the change for Venezuela originally expected for 2007-12-31 has 1112174242Sedwin# been brought forward to 2007-12-09. The official announcement was 1113174242Sedwin# published today in the "Gaceta Oficial de la Republica Bolivariana 1114174242Sedwin# de Venezuela, numero 38.819" (official document for all laws or 1115174242Sedwin# resolution publication) 1116174242Sedwin# http://www.globovision.com/news.php?nid=72208 1117172479Sedwin 11182742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 11192742SwollmanZone America/Caracas -4:27:44 - LMT 1890 112086222Swollman -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 112119878Swollman -4:30 - VET 1965 # Venezuela Time 1122174242Sedwin -4:00 - VET 2007 Dec 9 03:00 1123172479Sedwin -4:30 - VET 1124