southamerica revision 176974
1176974Sedwin# @(#)southamerica 8.18 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 108175034Sedwin# From Paul Eggert (2007-12-28): 109175034Sedwin# DST was set to expire on March 5, not March 3, but since it was converted 110175034Sedwin# to standard time on March 3 it's more convenient for us to pretend that 111175034Sedwin# it ended on March 3. 112175034SedwinRule Arg 2000 only - Mar 3 0:00 0 - 11358787Sru# 11458787Sru# From Peter Gradelski via Steffen Thorsen (2000-03-01): 11567578Swollman# We just checked with our Sao Paulo office and they say the government of 11658787Sru# Argentina decided not to become one of the countries that go on or off DST. 11758787Sru# So Buenos Aires should be -3 hours from GMT at all times. 11858787Sru# 119149514Swollman# From Fabian L. Arce Jofre (2000-04-04): 12064499Swollman# The law that claimed DST for Argentina was derogated by President Fernando 12164499Swollman# de la Rua on March 2, 2000, because it would make people spend more energy 12264499Swollman# in the winter time, rather than less. The change took effect on March 3. 12364499Swollman# 12486222Swollman# From Mariano Absatz (2001-06-06): 12586222Swollman# one of the major newspapers here in Argentina said that the 1999 12686222Swollman# Timezone Law (which never was effectively applied) will (would?) be 12786222Swollman# in effect.... The article is at 12886222Swollman# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 12986222Swollman# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 13086222Swollman# 1999-09-17, and published 1999-09-21. The official publication is at: 13186222Swollman# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 13286222Swollman# Regretfully, you have to subscribe (and pay) for the on-line version.... 13386222Swollman# 13486222Swollman# (2001-06-12): 13586222Swollman# the timezone for Argentina will not change next Sunday. 13686222Swollman# Apparently it will do so on Sunday 24th.... 13786222Swollman# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 13886222Swollman# 13986222Swollman# (2001-06-25): 14086222Swollman# Last Friday (yes, the last working day before the date of the change), the 14186222Swollman# Senate annulled the 1999 law that introduced the changes later postponed. 14286222Swollman# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 14386222Swollman# It remains the vote of the Deputies..., but it will be the same.... 14486222Swollman# This kind of things had always been done this way in Argentina. 14586222Swollman# We are still -03:00 all year round in all of the country. 14686222Swollman# 147175034Sedwin# From Steffen Thorsen (2007-12-21): 148175034Sedwin# A user (Leonardo Chaim) reported that Argentina will adopt DST.... 149175034Sedwin# all of the country (all Zone-entries) are affected. News reports like 150175034Sedwin# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate 151175034Sedwin# that Argentina will use DST next year as well, from October to 152175034Sedwin# March, although exact rules are not given. 153175034Sedwin# 154175034Sedwin# From Jesper Norgaard Welen (2007-12-26) 155175034Sedwin# The last hurdle of Argentina DST is over, the proposal was approved in 156175034Sedwin# the lower chamber too (Deputados) with a vote 192 for and 2 against. 157175034Sedwin# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to 158175034Sedwin# the original scanned proposal, where the dates and the zero hours are 159175034Sedwin# clear and unambiguous...This is the article about final approval: 160175034Sedwin# <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996"> 161175034Sedwin# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 162175034Sedwin# </a> 163175034Sedwin# 164175034Sedwin# From Paul Eggert (2007-12-22): 165175034Sedwin# For dates after mid-2008, the following rules are my guesses and 166175034Sedwin# are quite possibly wrong, but are more likely than no DST at all. 167175034SedwinRule Arg 2007 only - Dec 30 0:00 1:00 S 168175034SedwinRule Arg 2008 max - Mar Sun>=15 0:00 0 - 169175034SedwinRule Arg 2008 max - Oct Sun>=1 0:00 1:00 S 170175034Sedwin 171136638Swollman# From Mariano Absatz (2004-05-21): 172136638Swollman# Today it was officially published that the Province of Mendoza is changing 173136638Swollman# its timezone this winter... starting tomorrow night.... 174136638Swollman# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 175136638Swollman# From Paul Eggert (2004-05-24): 176136638Swollman# It's Law No. 7,210. This change is due to a public power emergency, so for 177136638Swollman# now we'll assume it's for this year only. 17893799Swollman# 179158421Swollman# From Paul Eggert (2006-03-22): 18093799Swollman# <a href="http://www.spicasc.net/horvera.html"> 181158421Swollman# Hora de verano para la Republica Argentina (2003-06-08) 18293799Swollman# </a> says that standard time in Argentina from 1894-10-31 18393799Swollman# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 184158421Swollman# over Shanks & Pottenger. 185136638Swollman# 186136638Swollman# From Mariano Absatz (2004-06-05): 187136638Swollman# These media articles from a major newspaper mostly cover the current state: 188136638Swollman# http://www.lanacion.com.ar/04/05/27/de_604825.asp 189136638Swollman# http://www.lanacion.com.ar/04/05/28/de_605203.asp 190136638Swollman# 191136638Swollman# The following eight (8) provinces pulled clocks back to UTC-04:00 at 192136638Swollman# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 193136638Swollman# Apparently, all nine provinces would go back to UTC-03:00 at the same 194136638Swollman# time in October 17th. 195136638Swollman# 196136638Swollman# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 197136638Swollman# Tierra del Fuego, Tucuman. 198136638Swollman# 199136638Swollman# From Mariano Absatz (2004-06-14): 200136638Swollman# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00 201136638Swollman# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 202136638Swollman# annoyance with the change is much higher than the power savings obtained.... 203136638Swollman# 204136638Swollman# From Gwillim Law (2004-06-14): 205136638Swollman# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 206136638Swollman# "The time change in Tierra del Fuego was a conflicted decision from 207136638Swollman# the start. The government had decreed that the measure would take 208136638Swollman# effect on June 1, but a normative error forced the new time to begin 209136638Swollman# three days earlier, from a Saturday to a Sunday.... 210136638Swollman# Our understanding was that the change was originally scheduled to take place 211136638Swollman# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 212136638Swollman# provinces). Sunday was May 30, only two days earlier. So the article 213136638Swollman# contains a contradiction. I would give more credence to the Saturday/Sunday 214136638Swollman# date than the "three days earlier" phrase, and conclude that Tierra del 215136638Swollman# Fuego set its clocks back at 2004-05-30 00:00. 216136638Swollman# 217136638Swollman# From Steffen Thorsen (2004-10-05): 218136638Swollman# The previous law 7210 which changed the province of Mendoza's time zone 219136638Swollman# back in May have been modified slightly in a new law 7277, which set the 220136638Swollman# new end date to 2004-09-26 (original date was 2004-10-17). 221136638Swollman# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 222136638Swollman# 223136638Swollman# From Mariano Absatz (2004-10-05): 224136638Swollman# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 225136638Swollman# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 226136638Swollman# at midnight between Saturday, July 24th and Sunday, July 25th.... 227136638Swollman# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 228136638Swollman# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 229136638Swollman# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 23093799Swollman 231158421Swollman# Unless otherwise specified, data are from Shanks & Pottenger through 1992, 232158421Swollman# from the IATA otherwise. As noted below, Shanks & Pottenger say that 233136638Swollman# America/Cordoba split into 6 subregions during 1991/1992, but we 23493799Swollman# haven't verified this yet so for now we'll keep it a single region. 23593799Swollman# 2362742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23720094Swollman# 238136638Swollman# Buenos Aires (BA), Capital Federal (CF), 239136638SwollmanZone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 24093799Swollman -4:16:48 - CMT 1920 May # Cordoba Mean Time 24119878Swollman -4:00 - ART 1930 Dec 24258787Sru -4:00 Arg AR%sT 1969 Oct 5 24393799Swollman -3:00 Arg AR%sT 1999 Oct 3 24493799Swollman -4:00 Arg AR%sT 2000 Mar 3 245175034Sedwin -3:00 Arg AR%sT 24620094Swollman# 24720094Swollman# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 248136638Swollman# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB), 249136638Swollman# San Luis (SL), La Pampa (LP), Neuquen (NQ), Rio Negro (RN) 25020094Swollman# 251158421Swollman# Shanks & Pottenger also make the following claims, which we haven't verified: 25293799Swollman# - Formosa switched to -3:00 on 1991-01-07. 25393799Swollman# - Misiones switched to -3:00 on 1990-12-29. 25493799Swollman# - Chaco switched to -3:00 on 1991-01-04. 25593799Swollman# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15, 25693799Swollman# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01. 25793799Swollman# - Santiago del Estero switched to -4:00 on 1991-04-01, 25893799Swollman# then to -3:00 on 1991-04-26. 25993799Swollman# 260136638SwollmanZone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 26193799Swollman -4:16:48 - CMT 1920 May 26220094Swollman -4:00 - ART 1930 Dec 26358787Sru -4:00 Arg AR%sT 1969 Oct 5 26493799Swollman -3:00 Arg AR%sT 1991 Mar 3 26593799Swollman -4:00 - WART 1991 Oct 20 26693799Swollman -3:00 Arg AR%sT 1999 Oct 3 26793799Swollman -4:00 Arg AR%sT 2000 Mar 3 268175034Sedwin -3:00 Arg AR%sT 26920094Swollman# 270136638Swollman# Tucuman (TM) 271136638SwollmanZone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 272136638Swollman -4:16:48 - CMT 1920 May 273136638Swollman -4:00 - ART 1930 Dec 274136638Swollman -4:00 Arg AR%sT 1969 Oct 5 275136638Swollman -3:00 Arg AR%sT 1991 Mar 3 276136638Swollman -4:00 - WART 1991 Oct 20 277136638Swollman -3:00 Arg AR%sT 1999 Oct 3 278136638Swollman -4:00 Arg AR%sT 2000 Mar 3 279136638Swollman -3:00 - ART 2004 Jun 1 280136638Swollman -4:00 - WART 2004 Jun 13 281175034Sedwin -3:00 Arg AR%sT 282136638Swollman# 283136638Swollman# La Rioja (LR) 284136638SwollmanZone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 285136638Swollman -4:16:48 - CMT 1920 May 286136638Swollman -4:00 - ART 1930 Dec 287136638Swollman -4:00 Arg AR%sT 1969 Oct 5 288136638Swollman -3:00 Arg AR%sT 1991 Mar 1 289136638Swollman -4:00 - WART 1991 May 7 290136638Swollman -3:00 Arg AR%sT 1999 Oct 3 291136638Swollman -4:00 Arg AR%sT 2000 Mar 3 292136638Swollman -3:00 - ART 2004 Jun 1 293136638Swollman -4:00 - WART 2004 Jun 20 294175034Sedwin -3:00 Arg AR%sT 295136638Swollman# 296136638Swollman# San Juan (SJ) 297136638SwollmanZone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 298136638Swollman -4:16:48 - CMT 1920 May 299136638Swollman -4:00 - ART 1930 Dec 300136638Swollman -4:00 Arg AR%sT 1969 Oct 5 301136638Swollman -3:00 Arg AR%sT 1991 Mar 1 302136638Swollman -4:00 - WART 1991 May 7 303136638Swollman -3:00 Arg AR%sT 1999 Oct 3 304136638Swollman -4:00 Arg AR%sT 2000 Mar 3 305136638Swollman -3:00 - ART 2004 May 31 306136638Swollman -4:00 - WART 2004 Jul 25 307175034Sedwin -3:00 Arg AR%sT 308136638Swollman# 30920094Swollman# Jujuy (JY) 310136638SwollmanZone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 31193799Swollman -4:16:48 - CMT 1920 May 31220094Swollman -4:00 - ART 1930 Dec 31320094Swollman -4:00 Arg AR%sT 1969 Oct 5 31493799Swollman -3:00 Arg AR%sT 1990 Mar 4 31593799Swollman -4:00 - WART 1990 Oct 28 31693799Swollman -4:00 1:00 WARST 1991 Mar 17 31720094Swollman -4:00 - WART 1991 Oct 6 31893799Swollman -3:00 1:00 ARST 1992 31993799Swollman -3:00 Arg AR%sT 1999 Oct 3 32093799Swollman -4:00 Arg AR%sT 2000 Mar 3 321175034Sedwin -3:00 Arg AR%sT 32220094Swollman# 323149514Swollman# Catamarca (CT), Chubut (CH) 324136638SwollmanZone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 32593799Swollman -4:16:48 - CMT 1920 May 32620094Swollman -4:00 - ART 1930 Dec 32758787Sru -4:00 Arg AR%sT 1969 Oct 5 32893799Swollman -3:00 Arg AR%sT 1991 Mar 3 32993799Swollman -4:00 - WART 1991 Oct 20 33093799Swollman -3:00 Arg AR%sT 1999 Oct 3 33193799Swollman -4:00 Arg AR%sT 2000 Mar 3 332136638Swollman -3:00 - ART 2004 Jun 1 333136638Swollman -4:00 - WART 2004 Jun 20 334175034Sedwin -3:00 Arg AR%sT 33520094Swollman# 33620094Swollman# Mendoza (MZ) 337136638SwollmanZone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 33893799Swollman -4:16:48 - CMT 1920 May 33920094Swollman -4:00 - ART 1930 Dec 34020094Swollman -4:00 Arg AR%sT 1969 Oct 5 34193799Swollman -3:00 Arg AR%sT 1990 Mar 4 34293799Swollman -4:00 - WART 1990 Oct 15 34393799Swollman -4:00 1:00 WARST 1991 Mar 1 34420094Swollman -4:00 - WART 1991 Oct 15 34520094Swollman -4:00 1:00 WARST 1992 Mar 1 34620094Swollman -4:00 - WART 1992 Oct 18 34793799Swollman -3:00 Arg AR%sT 1999 Oct 3 34893799Swollman -4:00 Arg AR%sT 2000 Mar 3 349136638Swollman -3:00 - ART 2004 May 23 350136638Swollman -4:00 - WART 2004 Sep 26 351175034Sedwin -3:00 Arg AR%sT 352136638Swollman# 353136638Swollman# Santa Cruz (SC) 354136638SwollmanZone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 355136638Swollman -4:16:48 - CMT 1920 May # Cordoba Mean Time 356136638Swollman -4:00 - ART 1930 Dec 357136638Swollman -4:00 Arg AR%sT 1969 Oct 5 358136638Swollman -3:00 Arg AR%sT 1999 Oct 3 359136638Swollman -4:00 Arg AR%sT 2000 Mar 3 360136638Swollman -3:00 - ART 2004 Jun 1 361136638Swollman -4:00 - WART 2004 Jun 20 362175034Sedwin -3:00 Arg AR%sT 363136638Swollman# 364136638Swollman# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) 365136638SwollmanZone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 366136638Swollman -4:16:48 - CMT 1920 May # Cordoba Mean Time 367136638Swollman -4:00 - ART 1930 Dec 368136638Swollman -4:00 Arg AR%sT 1969 Oct 5 369136638Swollman -3:00 Arg AR%sT 1999 Oct 3 370136638Swollman -4:00 Arg AR%sT 2000 Mar 3 371136638Swollman -3:00 - ART 2004 May 30 372136638Swollman -4:00 - WART 2004 Jun 20 373175034Sedwin -3:00 Arg AR%sT 3748029Swollman 37514343Swollman# Aruba 37614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 37714343SwollmanZone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 37819878Swollman -4:30 - ANT 1965 # Netherlands Antilles Time 37914343Swollman -4:00 - AST 38014343Swollman 3812742Swollman# Bolivia 3822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3832742SwollmanZone America/La_Paz -4:32:36 - LMT 1890 38486222Swollman -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 38519878Swollman -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 38619878Swollman -4:00 - BOT # Bolivia Time 3872742Swollman 3882742Swollman# Brazil 3892742Swollman 390149514Swollman# From Paul Eggert (1993-11-18): 3912742Swollman# The mayor of Rio recently attempted to change the time zone rules 3922742Swollman# just in his city, in order to leave more summer time for the tourist trade. 3932742Swollman# The rule change lasted only part of the day; 3942742Swollman# the federal government refused to follow the city's rules, and business 3952742Swollman# was in a chaos, so the mayor backed down that afternoon. 3962742Swollman 39720094Swollman# From IATA SSIM (1996-02): 39820094Swollman# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 39920094Swollman# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 40020094Swollman# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 40120094Swollman# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 40220094Swollman# [The last three states are new to this issue of the IATA SSIM.] 40320094Swollman 40420094Swollman# From Gwillim Law (1996-10-07): 40520094Swollman# Geography, history (Tocantins was part of Goias until 1989), and other 40620094Swollman# sources of time zone information lead me to believe that AL, SE, and TO were 40720094Swollman# always in BR1, and so the only change was whether or not they observed DST.... 40820094Swollman# The earliest issue of the SSIM I have is 2/91. Each issue from then until 40920094Swollman# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 41020094Swollman# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 41120094Swollman# (UTC-4).... The other two time zones given for Brazil are BR3, which is 41220094Swollman# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 41320094Swollman# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 41420094Swollman# become part of the state of Pernambuco). The boundary between BR1 and BR2 41520094Swollman# has never been clearly stated. They've simply been called East and West. 41620094Swollman# However, some conclusions can be drawn from another IATA manual: the Airline 41720094Swollman# Coding Directory, which lists close to 400 airports in Brazil. For each 41820094Swollman# airport it gives a time zone which is coded to the SSIM. From that 41920094Swollman# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 42020094Swollman# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 42120094Swollman# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 42220094Swollman 42343014Swollman# From Marcos Tadeu (1998-09-27): 42443014Swollman# <a href="http://pcdsh01.on.br/verao1.html"> 42543014Swollman# Brazilian official page 42643014Swollman# </a> 42775267Swollman 42875267Swollman# From Jesper Norgaard (2000-11-03): 42975267Swollman# [For an official list of which regions in Brazil use which time zones, see:] 43075267Swollman# http://pcdsh01.on.br/Fusbr.htm 43175267Swollman# http://pcdsh01.on.br/Fusbrhv.htm 43275267Swollman 433105196Swollman# From Celso Doria via David Madeo (2002-10-09): 434105196Swollman# The reason for the delay this year has to do with elections in Brazil. 435105196Swollman# 436105196Swollman# Unlike in the United States, elections in Brazil are 100% computerized and 437105196Swollman# the results are known almost immediately. Yesterday, it was the first 438105196Swollman# round of the elections when 115 million Brazilians voted for President, 439105196Swollman# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 440105196Swollman# counting (or re-counting) votes anymore and we know there will be a second 441105196Swollman# round for the Presidency and also for some Governors. The 2nd round will 442105196Swollman# take place on October 27th. 443105196Swollman# 444105196Swollman# The reason why the DST will only begin November 3rd is that the thousands 445105196Swollman# of electoral machines used cannot have their time changed, and since the 446105196Swollman# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 447105196Swollman# the Government decided to postpone DST, instead of changing the Constitution 448105196Swollman# (maybe, for the next elections, it will be possible to change the clock)... 449105196Swollman 450136638Swollman# From Rodrigo Severo (2004-10-04): 451136638Swollman# It's just the biannual change made necessary by the much hyped, supposedly 452136638Swollman# modern Brazilian eletronic voting machines which, apparently, can't deal 453136638Swollman# with a time change between the first and the second rounds of the elections. 454136638Swollman 455172479Sedwin# From Steffen Thorsen (2007-09-20): 456172479Sedwin# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 457172479Sedwin# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 458172479Sedwin 459105196Swollman# From Paul Eggert (2002-10-10): 460105196Swollman# The official decrees referenced below are mostly taken from 46143014Swollman# <a href="http://pcdsh01.on.br/DecHV.html"> 46243014Swollman# Decretos sobre o Horario de Verao no Brasil 463163302Sru# </a>. 46443014Swollman 4652742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 46643543Swollman# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) 46743543Swollman# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10) 46858787SruRule Brazil 1931 only - Oct 3 11:00 1:00 S 46958787SruRule Brazil 1932 1933 - Apr 1 0:00 0 - 47058787SruRule Brazil 1932 only - Oct 3 0:00 1:00 S 47143543Swollman# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) 47243014Swollman# revoked DST. 47343543Swollman# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) 47443543Swollman# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13) 47558787SruRule Brazil 1949 1952 - Dec 1 0:00 1:00 S 47658787SruRule Brazil 1950 only - Apr 16 1:00 0 - 47758787SruRule Brazil 1951 1952 - Apr 1 0:00 0 - 47843543Swollman# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) 47958787SruRule Brazil 1953 only - Mar 1 0:00 0 - 48043543Swollman# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) 48143014Swollman# revoked DST. 48243543Swollman# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18) 48343543Swollman# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 48443543Swollman# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 48543543Swollman# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03) 48643543Swollman# extended the above decree to all of the national territory on 12-09. 48758787SruRule Brazil 1963 only - Dec 9 0:00 1:00 S 48843543Swollman# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25) 48943543Swollman# extended summer time by one day to 1964-03-01 00:00 (start of school). 49058787SruRule Brazil 1964 only - Mar 1 0:00 0 - 49143543Swollman# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) 49258787SruRule Brazil 1965 only - Jan 31 0:00 1:00 S 49358787SruRule Brazil 1965 only - Mar 31 0:00 0 - 49443543Swollman# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) 49558787SruRule Brazil 1965 only - Dec 1 0:00 1:00 S 49643543Swollman# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) 49758787SruRule Brazil 1966 1968 - Mar 1 0:00 0 - 49858787SruRule Brazil 1966 1967 - Nov 1 0:00 1:00 S 49943543Swollman# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) 50043543Swollman# revoked DST. 50143543Swollman# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27) 50258787SruRule Brazil 1985 only - Nov 2 0:00 1:00 S 50343543Swollman# Decree 92,310 (1986-01-21) 50443543Swollman# Decree 92,463 (1986-03-13) 50558787SruRule Brazil 1986 only - Mar 15 0:00 0 - 50643543Swollman# Decree 93,316 (1986-10-01) 50758787SruRule Brazil 1986 only - Oct 25 0:00 1:00 S 50858787SruRule Brazil 1987 only - Feb 14 0:00 0 - 50943543Swollman# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) 51058787SruRule Brazil 1987 only - Oct 25 0:00 1:00 S 51158787SruRule Brazil 1988 only - Feb 7 0:00 0 - 51243543Swollman# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12) 51343543Swollman# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 51458787SruRule Brazil 1988 only - Oct 16 0:00 1:00 S 51558787SruRule Brazil 1989 only - Jan 29 0:00 0 - 51643543Swollman# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21) 51743543Swollman# with the same exceptions 51858787SruRule Brazil 1989 only - Oct 15 0:00 1:00 S 51958787SruRule Brazil 1990 only - Feb 11 0:00 0 - 52043543Swollman# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17) 52143543Swollman# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 52243543Swollman# Decree 99,629 (1990-10-19) adds BA, MT. 52358787SruRule Brazil 1990 only - Oct 21 0:00 1:00 S 52458787SruRule Brazil 1991 only - Feb 17 0:00 0 - 52543543Swollman# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25) 52643543Swollman# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 52758787SruRule Brazil 1991 only - Oct 20 0:00 1:00 S 52858787SruRule Brazil 1992 only - Feb 9 0:00 0 - 52943543Swollman# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16) 53043543Swollman# adopted by same states. 53158787SruRule Brazil 1992 only - Oct 25 0:00 1:00 S 53258787SruRule Brazil 1993 only - Jan 31 0:00 0 - 53343014Swollman# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) 53443543Swollman# adopted by same states, plus AM. 535136638Swollman# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22; 536136638Swollman# web page corrected 2004-01-07) adopted by same states, minus AM. 53743543Swollman# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) 538136638Swollman# adopted by same states, plus MT and TO. 53943543Swollman# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13) 54043543Swollman# adds AL, SE. 54158787SruRule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 54258787SruRule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 54358787SruRule Brazil 1996 only - Feb 11 0:00 0 - 54443543Swollman# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04) 54543543Swollman# adopted by same states, minus AL, SE. 54658787SruRule Brazil 1996 only - Oct 6 0:00 1:00 S 54758787SruRule Brazil 1997 only - Feb 16 0:00 0 - 548149514Swollman# From Daniel C. Sobral (1998-02-12): 54943014Swollman# In 1997, the DS began on October 6. The stated reason was that 55043014Swollman# because international television networks ignored Brazil's policy on DS, 55143014Swollman# they bought the wrong times on satellite for coverage of Pope's visit. 55243014Swollman# This year, the ending date of DS was postponed to March 1 55343014Swollman# to help dealing with the shortages of electric power. 55443014Swollman# 55543543Swollman# Decree 2,317 (1997-09-04), adopted by same states. 55658787SruRule Brazil 1997 only - Oct 6 0:00 1:00 S 55743543Swollman# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> 55843014Swollman# (1998-02-10) 55958787SruRule Brazil 1998 only - Mar 1 0:00 0 - 56043543Swollman# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11) 56158787Sru# adopted by the same states as before. 56258787SruRule Brazil 1998 only - Oct 11 0:00 1:00 S 56358787SruRule Brazil 1999 only - Feb 21 0:00 0 - 56458787Sru# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> 56558787Sru# (1999-08-23) adopted by same states. 56658787Sru# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30) 56767578Swollman# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 56867578SwollmanRule Brazil 1999 only - Oct 3 0:00 1:00 S 56967578SwollmanRule Brazil 2000 only - Feb 27 0:00 0 - 57067578Swollman# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) 57167578Swollman# adopted by the same states as before. 57275267Swollman# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) 57375267Swollman# repeals DST in PE and RR, effective 2000-10-15 00:00. 57475267Swollman# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) 57575267Swollman# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 57686222Swollman# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> 57786222Swollman# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 578105196SwollmanRule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 579163302SruRule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 580105196Swollman# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 581105196Swollman# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a> 582105196SwollmanRule Brazil 2002 only - Nov 3 0:00 1:00 S 583121098Swollman# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 584121098Swollman# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a> 585136638SwollmanRule Brazil 2003 only - Oct 19 0:00 1:00 S 586136638Swollman# Decree 5,223 (2004-10-01) reestablishes DST in MT. 587136638Swollman# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm"></a> 588136638SwollmanRule Brazil 2004 only - Nov 2 0:00 1:00 S 589153670Swollman# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19), 590153670Swollman# adopted by the same states as before. 591163302SruRule Brazil 2005 only - Oct 16 0:00 1:00 S 592172479Sedwin# Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03), 593172479Sedwin# adopted by the same states as before. 594172479SedwinRule Brazil 2006 only - Nov 5 0:00 1:00 S 595172479SedwinRule Brazil 2007 only - Feb 25 0:00 0 - 596172479Sedwin# (Decree number not yet known) 597172479Sedwin# http://www.brasil.gov.br/noticias/ultimas_noticias/horario_verao070920/ 598172479Sedwin# (2007-09-20) after a heads-up from Steffen Thorsen: 599172479SedwinRule Brazil 2007 max - Oct Sun>=8 0:00 1:00 S 600172479SedwinRule Brazil 2008 max - Feb Sun>=15 0:00 0 - 601121098Swollman# The latest ruleset listed above says that the following states observe DST: 602136638Swollman# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 603172479Sedwin# For dates after mid-2008, the above rules with TO="max" are guesses 60458787Sru# and are quite possibly wrong, but are more likely than no DST at all. 60520094Swollman 60643014Swollman 6072742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 60820094Swollman# 609136638Swollman# Fernando de Noronha (administratively part of PE) 6102742SwollmanZone America/Noronha -2:09:40 - LMT 1914 61158787Sru -2:00 Brazil FN%sT 1990 Sep 17 612136638Swollman -2:00 - FNT 1999 Sep 30 613136638Swollman -2:00 Brazil FN%sT 2000 Oct 15 614136638Swollman -2:00 - FNT 2001 Sep 13 615136638Swollman -2:00 Brazil FN%sT 2002 Oct 1 61658787Sru -2:00 - FNT 617136638Swollman# Other Atlantic islands have no permanent settlement. 618136638Swollman# These include Trindade and Martin Vaz (administratively part of ES), 619136638Swollman# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE). 620136638Swollman# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 621136638Swollman# it also included the Penedos. 62220094Swollman# 62358787Sru# Amapa (AP), east Para (PA) 62475267Swollman# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. 625121098Swollman# The division between east and west Para is the river Xingu. 626121098Swollman# In the north a very small part from the river Javary (now Jari I guess, 627121098Swollman# the border with Amapa) to the Amazon, then to the Xingu. 62843543SwollmanZone America/Belem -3:13:56 - LMT 1914 62958787Sru -3:00 Brazil BR%sT 1988 Sep 12 63058787Sru -3:00 - BRT 63143543Swollman# 63258787Sru# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), 63375267Swollman# Paraiba (PB) 63420094SwollmanZone America/Fortaleza -2:34:00 - LMT 1914 63558787Sru -3:00 Brazil BR%sT 1990 Sep 17 63658787Sru -3:00 - BRT 1999 Sep 30 63775267Swollman -3:00 Brazil BR%sT 2000 Oct 22 63886222Swollman -3:00 - BRT 2001 Sep 13 639105196Swollman -3:00 Brazil BR%sT 2002 Oct 1 640105196Swollman -3:00 - BRT 64120094Swollman# 64275267Swollman# Pernambuco (PE) (except Atlantic islands) 64375267SwollmanZone America/Recife -2:19:36 - LMT 1914 64475267Swollman -3:00 Brazil BR%sT 1990 Sep 17 64575267Swollman -3:00 - BRT 1999 Sep 30 64675267Swollman -3:00 Brazil BR%sT 2000 Oct 15 64786222Swollman -3:00 - BRT 2001 Sep 13 648105196Swollman -3:00 Brazil BR%sT 2002 Oct 1 649105196Swollman -3:00 - BRT 65075267Swollman# 65158787Sru# Tocantins (TO) 65243543SwollmanZone America/Araguaina -3:12:48 - LMT 1914 65358787Sru -3:00 Brazil BR%sT 1990 Sep 17 65458787Sru -3:00 - BRT 1995 Sep 14 655121098Swollman -3:00 Brazil BR%sT 2003 Sep 24 656121098Swollman -3:00 - BRT 65720094Swollman# 65858787Sru# Alagoas (AL), Sergipe (SE) 65943543SwollmanZone America/Maceio -2:22:52 - LMT 1914 66058787Sru -3:00 Brazil BR%sT 1990 Sep 17 66158787Sru -3:00 - BRT 1995 Oct 13 66258787Sru -3:00 Brazil BR%sT 1996 Sep 4 66358787Sru -3:00 - BRT 1999 Sep 30 66475267Swollman -3:00 Brazil BR%sT 2000 Oct 22 66586222Swollman -3:00 - BRT 2001 Sep 13 666105196Swollman -3:00 Brazil BR%sT 2002 Oct 1 667105196Swollman -3:00 - BRT 66843543Swollman# 669121098Swollman# Bahia (BA) 670121098Swollman# There are too many Salvadors elsewhere, so use America/Bahia instead 671121098Swollman# of America/Salvador. 672121098SwollmanZone America/Bahia -2:34:04 - LMT 1914 673121098Swollman -3:00 Brazil BR%sT 2003 Sep 24 674121098Swollman -3:00 - BRT 675121098Swollman# 676121098Swollman# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), 67758787Sru# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), 67858787Sru# Santa Catarina (SC), Rio Grande do Sul (RS) 6792742SwollmanZone America/Sao_Paulo -3:06:28 - LMT 1914 68058787Sru -3:00 Brazil BR%sT 1963 Oct 23 00:00 68158787Sru -3:00 1:00 BRST 1964 68258787Sru -3:00 Brazil BR%sT 68320094Swollman# 684121098Swollman# Mato Grosso do Sul (MS) 685121098SwollmanZone America/Campo_Grande -3:38:28 - LMT 1914 68658787Sru -4:00 Brazil AM%sT 68720094Swollman# 688121098Swollman# Mato Grosso (MT) 689121098SwollmanZone America/Cuiaba -3:44:20 - LMT 1914 690121098Swollman -4:00 Brazil AM%sT 2003 Sep 24 691138323Swollman -4:00 - AMT 2004 Oct 1 692136638Swollman -4:00 Brazil AM%sT 693121098Swollman# 69458787Sru# west Para (PA), Rondonia (RO) 69575267Swollman# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. 69643543SwollmanZone America/Porto_Velho -4:15:36 - LMT 1914 69758787Sru -4:00 Brazil AM%sT 1988 Sep 12 69858787Sru -4:00 - AMT 69943543Swollman# 70058787Sru# Roraima (RR) 70158787SruZone America/Boa_Vista -4:02:40 - LMT 1914 70258787Sru -4:00 Brazil AM%sT 1988 Sep 12 70358787Sru -4:00 - AMT 1999 Sep 30 70475267Swollman -4:00 Brazil AM%sT 2000 Oct 15 70575267Swollman -4:00 - AMT 70658787Sru# 70775267Swollman# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto 708121098Swollman# The great circle line from Tabatinga to Porto Acre divides 709121098Swollman# east from west Amazonas. 7102742SwollmanZone America/Manaus -4:00:04 - LMT 1914 71158787Sru -4:00 Brazil AM%sT 1988 Sep 12 71258787Sru -4:00 - AMT 1993 Sep 28 71358787Sru -4:00 Brazil AM%sT 1994 Sep 22 71458787Sru -4:00 - AMT 71520094Swollman# 71675267Swollman# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 71775267Swollman# Eirunepe, Envira, Ipixuna 71875267SwollmanZone America/Eirunepe -4:39:28 - LMT 1914 71975267Swollman -5:00 Brazil AC%sT 1988 Sep 12 72075267Swollman -5:00 - ACT 1993 Sep 28 72175267Swollman -5:00 Brazil AC%sT 1994 Sep 22 72275267Swollman -5:00 - ACT 72375267Swollman# 72458787Sru# Acre (AC) 72575267SwollmanZone America/Rio_Branco -4:31:12 - LMT 1914 72658787Sru -5:00 Brazil AC%sT 1988 Sep 12 72758787Sru -5:00 - ACT 7282742Swollman 7292742Swollman 7302742Swollman# Chile 7312742Swollman 73214343Swollman# From Eduardo Krell (1995-10-19): 73314343Swollman# The law says to switch to DST at midnight [24:00] on the second SATURDAY 73414343Swollman# of October.... The law is the same for March and October. 73543014Swollman# (1998-09-29): 73643014Swollman# Because of the drought this year, the government decided to go into 73743014Swollman# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 73843014Swollman# (unless there's another dry season next year, I guess). 7392742Swollman 74058787Sru# From Julio I. Pacheco Troncoso (1999-03-18): 74158787Sru# Because of the same drought, the government decided to end DST later, 74258787Sru# on April 3, (one-time change). 74358787Sru 744169811Swollman# From Oscar van Vlijmen (2006-10-08): 745169811Swollman# http://www.horaoficial.cl/cambio.htm 74675267Swollman 747169811Swollman# From Jesper Norgaard Welen (2006-10-08): 748169811Swollman# I think that there are some obvious mistakes in the suggested link 749169811Swollman# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4 750169811Swollman# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15 751169811Swollman# (they should have been 1990-09-15 and 1990-09-16 respectively), but 752169811Swollman# anyhow it clears up some doubts too. 75375267Swollman 754169811Swollman# From Paul Eggert (2006-12-27): 755169811Swollman# The following data for Chile and America/Santiago are from 756169811Swollman# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by 757169811Swollman# Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks 758169811Swollman# & Pottenger, except with DST transitions after 1932 cloned from 759169811Swollman# America/Santiago. The pre-1980 Pacific/Easter data are dubious, 760169811Swollman# but we have no other source. 761114173Swollman 762176974Sedwin# From German Poo-Caaman~o (2008-03-03): 763176974Sedwin# Due to drought, Chile extends Daylight Time in three weeks. This 764176974Sedwin# is one-time change (Saturday 3/29 at 24:00 for America/Santiago 765176974Sedwin# and Saturday 3/29 at 22:00 for Pacific/Easter) 766176974Sedwin# The Supreme Decree is located at 767176974Sedwin# <a href="http://www.shoa.cl/servicios/supremo316.pdf"> 768176974Sedwin# http://www.shoa.cl/servicios/supremo316.pdf 769176974Sedwin# </a> 770176974Sedwin# and the instructions for 2008 are located in: 771176974Sedwin# <a href="http://www.horaoficial.cl/cambio.htm"> 772176974Sedwin# http://www.horaoficial.cl/cambio.htm 773176974Sedwin# </a>. 774176974Sedwin 775176974Sedwin# From Jos� Miguel Garrido (2008-03-05): 776176974Sedwin# ... 777176974Sedwin# You could see the announces of the change on 778176974Sedwin# <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm"> 779176974Sedwin# http://www.shoa.cl/noticias/2008/04hora/hora.htm 780176974Sedwin# </a>. 781176974Sedwin 7822742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 783169811SwollmanRule Chile 1927 1932 - Sep 1 0:00 1:00 S 78458787SruRule Chile 1928 1932 - Apr 1 0:00 0 - 785169811SwollmanRule Chile 1942 only - Jun 1 4:00u 0 - 786169811SwollmanRule Chile 1942 only - Aug 1 5:00u 1:00 S 787169811SwollmanRule Chile 1946 only - Jul 15 4:00u 1:00 S 788169811SwollmanRule Chile 1946 only - Sep 1 3:00u 0:00 - 789169811SwollmanRule Chile 1947 only - Apr 1 4:00u 0 - 790169811SwollmanRule Chile 1968 only - Nov 3 4:00u 1:00 S 791169811SwollmanRule Chile 1969 only - Mar 30 3:00u 0 - 792169811SwollmanRule Chile 1969 only - Nov 23 4:00u 1:00 S 793169811SwollmanRule Chile 1970 only - Mar 29 3:00u 0 - 794169811SwollmanRule Chile 1971 only - Mar 14 3:00u 0 - 795169811SwollmanRule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S 796169811SwollmanRule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 797169811SwollmanRule Chile 1973 only - Sep 30 4:00u 1:00 S 798169811SwollmanRule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S 799169811SwollmanRule Chile 1987 only - Apr 12 3:00u 0 - 800169811SwollmanRule Chile 1988 1989 - Mar Sun>=9 3:00u 0 - 801169811SwollmanRule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S 802169811SwollmanRule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S 803169811SwollmanRule Chile 1990 only - Mar 18 3:00u 0 - 804169811SwollmanRule Chile 1990 only - Sep 16 4:00u 1:00 S 805169811SwollmanRule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 806169811SwollmanRule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S 807169811SwollmanRule Chile 1997 only - Mar 30 3:00u 0 - 808169811SwollmanRule Chile 1998 only - Mar Sun>=9 3:00u 0 - 80975267SwollmanRule Chile 1998 only - Sep 27 4:00u 1:00 S 81075267SwollmanRule Chile 1999 only - Apr 4 3:00u 0 - 81175267SwollmanRule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S 812176974SedwinRule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - 813176974Sedwin# N.B.: the end of March 29 in Chile is March 30 in Universal time, 814176974Sedwin# which is used below in specifying the transition. 815176974SedwinRule Chile 2008 only - Mar 30 3:00u 0 - 816176974SedwinRule Chile 2009 max - Mar Sun>=9 3:00u 0 - 817169811Swollman# IATA SSIM anomalies: (1992-02) says 1992-03-14; 81858787Sru# (1996-09) says 1998-03-08. Ignore these. 8192742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 820169811SwollmanZone America/Santiago -4:42:46 - LMT 1890 821169811Swollman -4:42:46 - SMT 1910 # Santiago Mean Time 822169811Swollman -5:00 - CLT 1916 Jul 1 # Chile Time 823169811Swollman -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time 824169811Swollman -4:00 - CLT 1919 Jul 1 # Chile Time 825169811Swollman -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time 826169811Swollman -5:00 Chile CL%sT 1947 May 22 # Chile Time 82719878Swollman -4:00 Chile CL%sT 828169811SwollmanZone Pacific/Easter -7:17:44 - LMT 1890 829169811Swollman -7:17:28 - EMT 1932 Sep # Easter Mean Time 830158421Swollman -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time 83119878Swollman -6:00 Chile EAS%sT 8322742Swollman# 83386222Swollman# Sala y Gomez Island is like Pacific/Easter. 83486222Swollman# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, 83586222Swollman# San Felix, and Antarctic bases, are like America/Santiago. 8362742Swollman 8372742Swollman# Colombia 83820094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 839158421SwollmanRule CO 1992 only - May 3 0:00 1:00 S 840158421SwollmanRule CO 1993 only - Apr 4 0:00 0 - 8412742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8422742SwollmanZone America/Bogota -4:56:20 - LMT 1884 Mar 13 84319878Swollman -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 84420094Swollman -5:00 CO CO%sT # Colombia Time 8452742Swollman# Malpelo, Providencia, San Andres 8462742Swollman# no information; probably like America/Bogota 8472742Swollman 8482742Swollman# Curacao 849158421Swollman# 850169811Swollman# From Paul Eggert (2006-03-22): 851158421Swollman# Shanks & Pottenger say that The Bottom and Philipsburg have been at 852158421Swollman# -4:00 since standard time was introduced on 1912-03-02; and that 853158421Swollman# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from 854158421Swollman# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say 855158421Swollman# Saba Island has been like Curacao. 856169811Swollman# This all predates our 1970 cutoff, though. 857158421Swollman# 858158421Swollman# By July 2007 Curacao and St Maarten are planned to become 859158421Swollman# associated states within the Netherlands, much like Aruba; 860158421Swollman# Bonaire, Saba and St Eustatius would become directly part of the 861158421Swollman# Netherlands as Kingdom Islands. This won't affect their time zones 862158421Swollman# though, as far as we know. 863169811Swollman# 8642742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8652742SwollmanZone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 86619878Swollman -4:30 - ANT 1965 # Netherlands Antilles Time 8672742Swollman -4:00 - AST 8682742Swollman 8692742Swollman# Ecuador 870169811Swollman# 871169811Swollman# From Paul Eggert (2007-03-04): 872169811Swollman# Apparently Ecuador had a failed experiment with DST in 1992. 873169811Swollman# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and 874169811Swollman# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both 875169811Swollman# talk about "hora Sixto". Leave this alone for now, as we have no data. 876169811Swollman# 8772742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8782742SwollmanZone America/Guayaquil -5:19:20 - LMT 1890 87919878Swollman -5:14:00 - QMT 1931 # Quito Mean Time 88019878Swollman -5:00 - ECT # Ecuador Time 8812742SwollmanZone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 88219878Swollman -5:00 - ECT 1986 88319878Swollman -6:00 - GALT # Galapagos Time 8842742Swollman 8852742Swollman# Falklands 88675267Swollman 887158421Swollman# From Paul Eggert (2006-03-22): 888158421Swollman# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 889158421Swollman# the IATA gives 1996-09-08. Go with Shanks & Pottenger. 89075267Swollman 89175267Swollman# From Falkland Islands Government Office, London (2001-01-22) 89275267Swollman# via Jesper Norgaard: 89375267Swollman# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 89475267Swollman# April 2001 and advance one hour to summer time at 2 am on Sunday 2 89575267Swollman# September. It is anticipated that the clocks will revert back at 2 89675267Swollman# am on Sunday 21 April 2002 and advance to summer time at 2 am on 89775267Swollman# Sunday 1 September. 89875267Swollman 89975267Swollman# From Rives McDow (2001-02-13): 90075267Swollman# 90175267Swollman# I have communicated several times with people there, and the last 90275267Swollman# time I had communications that was helpful was in 1998. Here is 90375267Swollman# what was said then: 90475267Swollman# 90575267Swollman# "The general rule was that Stanley used daylight saving and the Camp 90675267Swollman# did not. However for various reasons many people in the Camp have 90775267Swollman# started to use daylight saving (known locally as 'Stanley Time') 90875267Swollman# There is no rule as to who uses daylight saving - it is a matter of 90975267Swollman# personal choice and so it is impossible to draw a map showing who 91075267Swollman# uses it and who does not. Any list would be out of date as soon as 91175267Swollman# it was produced. This year daylight saving ended on April 18/19th 91275267Swollman# and started again on September 12/13th. I do not know what the rule 91375267Swollman# is, but can find out if you like. We do not change at the same time 91475267Swollman# as UK or Chile." 91575267Swollman# 91675267Swollman# I did have in my notes that the rule was "Second Saturday in Sep at 91775267Swollman# 0:00 until third Saturday in Apr at 0:00". I think that this does 91875267Swollman# not agree in some cases with Shanks; is this true? 91975267Swollman# 92075267Swollman# Also, there is no mention in the list that some areas in the 92175267Swollman# Falklands do not use DST. I have found in my communications there 92275267Swollman# that these areas are on the western half of East Falkland and all of 92375267Swollman# West Falkland. Stanley is the only place that consistently observes 92475267Swollman# DST. Again, as in other places in the world, the farmers don't like 92575267Swollman# it. West Falkland is almost entirely sheep farmers. 92675267Swollman# 92775267Swollman# I know one lady there that keeps a list of which farm keeps DST and 92875267Swollman# which doesn't each year. She runs a shop in Stanley, and says that 92975267Swollman# the list changes each year. She uses it to communicate to her 93075267Swollman# customers, catching them when they are home for lunch or dinner. 93175267Swollman 93275267Swollman# From Paul Eggert (2001-03-05): 93375267Swollman# For now, we'll just record the time in Stanley, since we have no 93475267Swollman# better info. 93575267Swollman 9362742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 93719878SwollmanRule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 93819878SwollmanRule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 93919878SwollmanRule Falk 1939 only - Oct 1 0:00 1:00 S 94019878SwollmanRule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 94119878SwollmanRule Falk 1943 only - Jan 1 0:00 0 - 94219878SwollmanRule Falk 1983 only - Sep lastSun 0:00 1:00 S 94319878SwollmanRule Falk 1984 1985 - Apr lastSun 0:00 0 - 94419878SwollmanRule Falk 1984 only - Sep 16 0:00 1:00 S 94575267SwollmanRule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 94675267SwollmanRule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 94775267SwollmanRule Falk 2001 max - Apr Sun>=15 2:00 0 - 94875267SwollmanRule Falk 2001 max - Sep Sun>=1 2:00 1:00 S 9492742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9502742SwollmanZone Atlantic/Stanley -3:51:24 - LMT 1890 95119878Swollman -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 95219878Swollman -4:00 Falk FK%sT 1983 May # Falkland Is Time 95319878Swollman -3:00 Falk FK%sT 1985 Sep 15 95419878Swollman -4:00 Falk FK%sT 9552742Swollman 9562742Swollman# French Guiana 9572742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9582742SwollmanZone America/Cayenne -3:29:20 - LMT 1911 Jul 95919878Swollman -4:00 - GFT 1967 Oct # French Guiana Time 96019878Swollman -3:00 - GFT 9612742Swollman 9622742Swollman# Guyana 9632742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9642742SwollmanZone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 96519878Swollman -3:45 - GBGT 1966 May 26 # Br Guiana Time 96619878Swollman -3:45 - GYT 1975 Jul 31 # Guyana Time 96720094Swollman -3:00 - GYT 1991 96820094Swollman# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 96920094Swollman -4:00 - GYT 9702742Swollman 9712742Swollman# Paraguay 972158421Swollman# From Paul Eggert (2006-03-22): 973158421Swollman# Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00, 974158421Swollman# and autumn transitions are from 00:00 -> 23:00. Go with pre-1999 97558787Sru# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 9762742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 97758787SruRule Para 1975 1988 - Oct 1 0:00 1:00 S 97819878SwollmanRule Para 1975 1978 - Mar 1 0:00 0 - 97958787SruRule Para 1979 1991 - Apr 1 0:00 0 - 98019878SwollmanRule Para 1989 only - Oct 22 0:00 1:00 S 98120094SwollmanRule Para 1990 only - Oct 1 0:00 1:00 S 98220094SwollmanRule Para 1991 only - Oct 6 0:00 1:00 S 98320094SwollmanRule Para 1992 only - Mar 1 0:00 0 - 98420094SwollmanRule Para 1992 only - Oct 5 0:00 1:00 S 98520094SwollmanRule Para 1993 only - Mar 31 0:00 0 - 98630711SwollmanRule Para 1993 1995 - Oct 1 0:00 1:00 S 98720094SwollmanRule Para 1994 1995 - Feb lastSun 0:00 0 - 98858787SruRule Para 1996 only - Mar 1 0:00 0 - 98975267Swollman# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 99067578Swollman# From Steffen Thorsen (2000-10-02): 99167578Swollman# I have three independent reports that Paraguay changed to DST this Sunday 99267578Swollman# (10-01). 99375267Swollman# 99475267Swollman# Translated by Gwillim Law (2001-02-27) from 99575267Swollman# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> 99675267Swollman# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) 99775267Swollman# </a>: 99875267Swollman# Starting at 0:00 today, the clock will be set forward 60 minutes, in 99975267Swollman# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 100075267Swollman# system has been operating for several years. Formerly there was a separate 100175267Swollman# decree each year; the new law has the same effect, but permanently. Every 100275267Swollman# year, the time will change on the first Sunday of October; likewise, the 100375267Swollman# clock will be set back on the first Sunday of March. 100475267Swollman# 100593799SwollmanRule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 1006158421Swollman# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 100775267SwollmanRule Para 1997 only - Feb lastSun 0:00 0 - 1008158421Swollman# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 100975267Swollman# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 101093799SwollmanRule Para 1998 2001 - Mar Sun>=1 0:00 0 - 101193799Swollman# From Rives McDow (2002-02-28): 101293799Swollman# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 101393799Swollman# dst method to be from the first Sunday in September to the first Sunday in 101493799Swollman# April. 1015149514SwollmanRule Para 2002 2004 - Apr Sun>=1 0:00 0 - 1016149514SwollmanRule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 1017149514Swollman# 1018149514Swollman# From Jesper Norgaard Welen (2005-01-02): 1019149514Swollman# There are several sources that claim that Paraguay made 1020149514Swollman# a timezone rule change in autumn 2004. 1021149514Swollman# From Steffen Thorsen (2005-01-05): 1022169811Swollman# Decree 1,867 (2004-03-05) 1023169811Swollman# From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13) 1024169811Swollman# <http://www.presidencia.gov.py/decretos/D1867.pdf> 1025149514SwollmanRule Para 2004 max - Oct Sun>=15 0:00 1:00 S 1026149514SwollmanRule Para 2005 max - Mar Sun>=8 0:00 0 - 102775267Swollman 10282742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10292742SwollmanZone America/Asuncion -3:50:40 - LMT 1890 103019878Swollman -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 103119878Swollman -4:00 - PYT 1972 Oct # Paraguay Time 103219878Swollman -3:00 - PYT 1974 Apr 103319878Swollman -4:00 Para PY%sT 10342742Swollman 10352742Swollman# Peru 1036136638Swollman# 1037136638Swollman# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net"> 1038136638Swollman# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a> 1039149514Swollman# When we were in Peru in 1985-1986, they apparently switched over 1040136638Swollman# sometime between December 29 and January 3 while we were on the Amazon. 1041136638Swollman# 1042158421Swollman# From Paul Eggert (2006-03-22): 1043158421Swollman# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 1044136638Swollman 10452742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 104619878SwollmanRule Peru 1938 only - Jan 1 0:00 1:00 S 104719878SwollmanRule Peru 1938 only - Apr 1 0:00 0 - 104819878SwollmanRule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 104919878SwollmanRule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 1050136638SwollmanRule Peru 1986 1987 - Jan 1 0:00 1:00 S 1051136638SwollmanRule Peru 1986 1987 - Apr 1 0:00 0 - 105219878SwollmanRule Peru 1990 only - Jan 1 0:00 1:00 S 105319878SwollmanRule Peru 1990 only - Apr 1 0:00 0 - 1054158421Swollman# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 105558787SruRule Peru 1994 only - Jan 1 0:00 1:00 S 105658787SruRule Peru 1994 only - Apr 1 0:00 0 - 10572742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10582742SwollmanZone America/Lima -5:08:12 - LMT 1890 105986222Swollman -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 106019878Swollman -5:00 Peru PE%sT # Peru Time 10612742Swollman 10622742Swollman# South Georgia 10632742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10642742SwollmanZone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 106519878Swollman -2:00 - GST # South Georgia Time 10662742Swollman 10672742Swollman# South Sandwich Is 106858787Sru# uninhabited; scientific personnel have wintered 10692742Swollman 10702742Swollman# Suriname 10712742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10722742SwollmanZone America/Paramaribo -3:40:40 - LMT 1911 10732742Swollman -3:40:52 - PMT 1935 # Paramaribo Mean Time 10742742Swollman -3:40:36 - PMT 1945 Oct # The capital moved? 107519878Swollman -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 107619878Swollman -3:30 - SRT 1984 Oct # Suriname Time 107719878Swollman -3:00 - SRT 10782742Swollman 10792742Swollman# Trinidad and Tobago 10802742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10812742SwollmanZone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 10822742Swollman -4:00 - AST 10832742Swollman 10842742Swollman# Uruguay 1085149514Swollman# From Paul Eggert (1993-11-18): 10862742Swollman# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1087158421Swollman# From Shanks & Pottenger: 10882742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1089158421Swollman# Whitman gives 1923 Oct 1; go with Shanks & Pottenger. 109019878SwollmanRule Uruguay 1923 only - Oct 2 0:00 0:30 HS 109119878SwollmanRule Uruguay 1924 1926 - Apr 1 0:00 0 - 109219878SwollmanRule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 109319878SwollmanRule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1094158421Swollman# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman. 109519878SwollmanRule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 109619878SwollmanRule Uruguay 1936 only - Nov 1 0:00 0:30 HS 109719878SwollmanRule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1098158421Swollman# Whitman gives 1937 Oct 3; go with Shanks & Pottenger. 109919878SwollmanRule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 11002742Swollman# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1101158421Swollman# and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger. 1102158421SwollmanRule Uruguay 1941 only - Aug 1 0:00 0:30 HS 1103158421SwollmanRule Uruguay 1942 only - Jan 1 0:00 0 - 110419878SwollmanRule Uruguay 1942 only - Dec 14 0:00 1:00 S 110519878SwollmanRule Uruguay 1943 only - Mar 14 0:00 0 - 110619878SwollmanRule Uruguay 1959 only - May 24 0:00 1:00 S 110719878SwollmanRule Uruguay 1959 only - Nov 15 0:00 0 - 110819878SwollmanRule Uruguay 1960 only - Jan 17 0:00 1:00 S 110919878SwollmanRule Uruguay 1960 only - Mar 6 0:00 0 - 111019878SwollmanRule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 111119878SwollmanRule Uruguay 1965 only - Sep 26 0:00 0 - 111219878SwollmanRule Uruguay 1966 1967 - Oct 31 0:00 0 - 111319878SwollmanRule Uruguay 1968 1970 - May 27 0:00 0:30 HS 111419878SwollmanRule Uruguay 1968 1970 - Dec 2 0:00 0 - 111519878SwollmanRule Uruguay 1972 only - Apr 24 0:00 1:00 S 111619878SwollmanRule Uruguay 1972 only - Aug 15 0:00 0 - 111719878SwollmanRule Uruguay 1974 only - Mar 10 0:00 0:30 HS 111819878SwollmanRule Uruguay 1974 only - Dec 22 0:00 1:00 S 111919878SwollmanRule Uruguay 1976 only - Oct 1 0:00 0 - 112019878SwollmanRule Uruguay 1977 only - Dec 4 0:00 1:00 S 112119878SwollmanRule Uruguay 1978 only - Apr 1 0:00 0 - 112219878SwollmanRule Uruguay 1979 only - Oct 1 0:00 1:00 S 112319878SwollmanRule Uruguay 1980 only - May 1 0:00 0 - 112419878SwollmanRule Uruguay 1987 only - Dec 14 0:00 1:00 S 112519878SwollmanRule Uruguay 1988 only - Mar 14 0:00 0 - 112619878SwollmanRule Uruguay 1988 only - Dec 11 0:00 1:00 S 112719878SwollmanRule Uruguay 1989 only - Mar 12 0:00 0 - 112819878SwollmanRule Uruguay 1989 only - Oct 29 0:00 1:00 S 1129158421Swollman# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2, 113058787Sru# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 113120094SwollmanRule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 113220094SwollmanRule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 113330711SwollmanRule Uruguay 1992 only - Oct 18 0:00 1:00 S 113420094SwollmanRule Uruguay 1993 only - Feb 28 0:00 0 - 1135136638Swollman# From Eduardo Cota (2004-09-20): 1136136638Swollman# The uruguayan government has decreed a change in the local time.... 1137136638Swollman# http://www.presidencia.gub.uy/decretos/2004091502.htm 1138149514SwollmanRule Uruguay 2004 only - Sep 19 0:00 1:00 S 1139149514Swollman# From Steffen Thorsen (2005-03-11): 1140149514Swollman# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1141149514Swollman# save energy ... it was postponed two weeks.... 1142149514Swollman# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1143149514SwollmanRule Uruguay 2005 only - Mar 27 2:00 0 - 1144153670Swollman# From Eduardo Cota (2005-09-27): 1145153670Swollman# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1146153670Swollman# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1147153670Swollman# 02:00 local time, official time in Uruguay will be at GMT -2. 1148153670SwollmanRule Uruguay 2005 only - Oct 9 2:00 1:00 S 1149153670SwollmanRule Uruguay 2006 only - Mar 12 2:00 0 - 1150163302Sru# From Jesper Norgaard Welen (2006-09-06): 1151163302Sru# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF 1152163302SruRule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S 1153163302SruRule Uruguay 2007 max - Mar Sun>=8 2:00 0 - 11542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 11552742SwollmanZone America/Montevideo -3:44:44 - LMT 1898 Jun 28 115619878Swollman -3:44:44 - MMT 1920 May 1 # Montevideo MT 115719878Swollman -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 115819878Swollman -3:00 Uruguay UY%sT 11592742Swollman 11602742Swollman# Venezuela 1161172479Sedwin# 1162174242Sedwin# From John Stainforth (2007-11-28): 1163174242Sedwin# ... the change for Venezuela originally expected for 2007-12-31 has 1164174242Sedwin# been brought forward to 2007-12-09. The official announcement was 1165174242Sedwin# published today in the "Gaceta Oficial de la Republica Bolivariana 1166174242Sedwin# de Venezuela, numero 38.819" (official document for all laws or 1167174242Sedwin# resolution publication) 1168174242Sedwin# http://www.globovision.com/news.php?nid=72208 1169172479Sedwin 11702742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 11712742SwollmanZone America/Caracas -4:27:44 - LMT 1890 117286222Swollman -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 117319878Swollman -4:30 - VET 1965 # Venezuela Time 1174174242Sedwin -4:00 - VET 2007 Dec 9 03:00 1175172479Sedwin -4:30 - VET 1176