southamerica revision 121098
1121098Swollman# @(#)southamerica 7.49 264499Swollman 32742Swollman# This data is by no means authoritative; if you think you know better, 42742Swollman# go ahead and edit the file (and please send any changes to 52742Swollman# tz@elsie.nci.nih.gov for general use in the future). 62742Swollman 758787Sru# From Paul Eggert <eggert@twinsun.com> (1999-07-07): 82742Swollman# A good source for time zone historical data outside the U.S. is 958787Sru# Thomas G. Shanks, The International Atlas (5th edition), 1058787Sru# San Diego: ACS Publications, Inc. (1999). 112742Swollman# 1286222Swollman# Gwillim Law writes that a good source 1320094Swollman# for recent time zone data is the International Air Transport 1420094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 1520094Swollman# published semiannually. Law sent in several helpful summaries 1620094Swollman# of the IATA's data after 1990. 1720094Swollman# 1820094Swollman# Except where otherwise noted, Shanks is the source for entries through 1990, 1920094Swollman# and IATA SSIM is the source for entries after 1990. 2020094Swollman# 2119878Swollman# Earlier editions of these tables used the North American style (e.g. ARST and 2219878Swollman# ARDT for Argentine Standard and Daylight Time), but the following quote 2319878Swollman# suggests that it's better to use European style (e.g. ART and ARST). 2419878Swollman# I suggest the use of _Summer time_ instead of the more cumbersome 2519878Swollman# _daylight-saving time_. _Summer time_ seems to be in general use 2619878Swollman# in Europe and South America. 2719878Swollman# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 2819878Swollman# H L Mencken, _The American Language: Supplement I_ (1960), p 466 2958787Sru# 3058787Sru# Earlier editions of these tables also used the North American style 3158787Sru# for time zones in Brazil, but this was incorrect, as Brazilians say 3258787Sru# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in 3358787Sru# the railroad sector, writes (1999-07-06): 3458787Sru# The subject of time zones is currently a matter of discussion/debate in 3558787Sru# Brazil. Let's say that "the Brasilia time" is considered the 3658787Sru# "official time" because Brasilia is the capital city. 3758787Sru# The other three time zones are called "Brasilia time "minus one" or 3858787Sru# "plus one" or "plus two". As far as I know there is no such 3958787Sru# name/designation as "Eastern Time" or "Central Time". 4058787Sru# So I invented the following (English-language) abbreviations for now. 4158787Sru# Corrections are welcome! 4258787Sru# std dst 4358787Sru# -2:00 FNT FNST Fernando de Noronha 4458787Sru# -3:00 BRT BRST Brasilia 4558787Sru# -4:00 AMT AMST Amazon 4658787Sru# -5:00 ACT ACST Acre 472742Swollman 482742Swollman############################################################################### 492742Swollman 502742Swollman############################################################################### 512742Swollman 522742Swollman# Argentina 532742Swollman 5419878Swollman# From Bob Devine (1988-01-28): 552742Swollman# Argentina: first Sunday in October to first Sunday in April since 1976. 562742Swollman# Double Summer time from 1969 to 1974. Switches at midnight. 572742Swollman 5819878Swollman# From U. S. Naval Observatory (1988-01-199): 592742Swollman# ARGENTINA 3 H BEHIND UTC 602742Swollman 6119878Swollman# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 6221217Swollman# I am sending modifications to the Argentine time zone table... 639908Swollman# AR was chosen because they are the ISO letters that represent Argentina. 649908Swollman 652742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 6619878SwollmanRule Arg 1930 only - Dec 1 0:00 1:00 S 6719878SwollmanRule Arg 1931 only - Apr 1 0:00 0 - 6819878SwollmanRule Arg 1931 only - Oct 15 0:00 1:00 S 6919878SwollmanRule Arg 1932 1940 - Mar 1 0:00 0 - 7019878SwollmanRule Arg 1932 1939 - Nov 1 0:00 1:00 S 7119878SwollmanRule Arg 1940 only - Jul 1 0:00 1:00 S 7219878SwollmanRule Arg 1941 only - Jun 15 0:00 0 - 7319878SwollmanRule Arg 1941 only - Oct 15 0:00 1:00 S 7419878SwollmanRule Arg 1943 only - Aug 1 0:00 0 - 7519878SwollmanRule Arg 1943 only - Oct 15 0:00 1:00 S 7619878SwollmanRule Arg 1946 only - Mar 1 0:00 0 - 7719878SwollmanRule Arg 1946 only - Oct 1 0:00 1:00 S 7819878SwollmanRule Arg 1963 only - Oct 1 0:00 0 - 7919878SwollmanRule Arg 1963 only - Dec 15 0:00 1:00 S 8019878SwollmanRule Arg 1964 1966 - Mar 1 0:00 0 - 8119878SwollmanRule Arg 1964 1966 - Oct 15 0:00 1:00 S 8293799SwollmanRule Arg 1967 only - Apr 2 0:00 0 - 8358787SruRule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 8458787SruRule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 8519878SwollmanRule Arg 1974 only - Jan 23 0:00 1:00 S 8619878SwollmanRule Arg 1974 only - May 1 0:00 0 - 8719878SwollmanRule Arg 1988 only - Dec 1 0:00 1:00 S 889908Swollman# 8919878Swollman# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 909908Swollman# These corrections were contributed by InterSoft Argentina S.A., 919908Swollman# obtaining the data from the: 929908Swollman# Talleres de Hidrografia Naval Argentina 9321217Swollman# (Argentine Naval Hydrography Institute) 949908Swollman# 9558787Sru# Shanks stops after 1992-03-01; go with Otero. 9619878SwollmanRule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 9719878SwollmanRule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 989908Swollman# 9919878Swollman# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 1009908Swollman# From this moment on, the law that mandated the daylight saving 1019908Swollman# time corrections was derogated and no more modifications 1029908Swollman# to the time zones (for daylight saving) are now made. 1039908Swollman# 10458787Sru# From Rives McDow (2000-01-10): 10558787Sru# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 10658787Sru# which did not result in the switch of a time zone, as they stayed 9 hours 10764499Swollman# from the International Date Line. 10864499SwollmanRule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 10964499SwollmanRule Arg 2000 only - Mar Sun>=1 0:00 0 - 11058787Sru# 11158787Sru# From Peter Gradelski via Steffen Thorsen (2000-03-01): 11267578Swollman# We just checked with our Sao Paulo office and they say the government of 11358787Sru# Argentina decided not to become one of the countries that go on or off DST. 11458787Sru# So Buenos Aires should be -3 hours from GMT at all times. 11558787Sru# 11664499Swollman# From Fabian L. Arce Jofre <farcejofre@bigfoot.com> (2000-04-04): 11764499Swollman# The law that claimed DST for Argentina was derogated by President Fernando 11864499Swollman# de la Rua on March 2, 2000, because it would make people spend more energy 11964499Swollman# in the winter time, rather than less. The change took effect on March 3. 12064499Swollman# 12186222Swollman# From Mariano Absatz (2001-06-06): 12286222Swollman# one of the major newspapers here in Argentina said that the 1999 12386222Swollman# Timezone Law (which never was effectively applied) will (would?) be 12486222Swollman# in effect.... The article is at 12586222Swollman# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 12686222Swollman# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 12786222Swollman# 1999-09-17, and published 1999-09-21. The official publication is at: 12886222Swollman# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 12986222Swollman# Regretfully, you have to subscribe (and pay) for the on-line version.... 13086222Swollman# 13186222Swollman# (2001-06-12): 13286222Swollman# the timezone for Argentina will not change next Sunday. 13386222Swollman# Apparently it will do so on Sunday 24th.... 13486222Swollman# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 13586222Swollman# 13686222Swollman# (2001-06-25): 13786222Swollman# Last Friday (yes, the last working day before the date of the change), the 13886222Swollman# Senate annulled the 1999 law that introduced the changes later postponed. 13986222Swollman# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 14086222Swollman# It remains the vote of the Deputies..., but it will be the same.... 14186222Swollman# This kind of things had always been done this way in Argentina. 14286222Swollman# We are still -03:00 all year round in all of the country. 14386222Swollman# 14493799Swollman# 14593799Swollman# From Paul Eggert (2002-01-22): 14693799Swollman# <a href="http://www.spicasc.net/horvera.html"> 14793799Swollman# Hora de verano para la Republica Argentina (2000-10-01) 14893799Swollman# </a> says that standard time in Argentina from 1894-10-31 14993799Swollman# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 15093799Swollman# over Shanks. 15193799Swollman 15293799Swollman# Unless otherwise specified, data are from Shanks through 1992, from 15393799Swollman# the IATA otherwise. As noted below, Shanks says that 15493799Swollman# America/Cordoba split into 7 subregions during 1991/1992, but we 15593799Swollman# haven't verified this yet so for now we'll keep it a single region. 15693799Swollman# 1572742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15820094Swollman# 15964499Swollman# Buenos Aires (BA), Capital Federal (CF), Santa Cruz (SC), 16064499Swollman# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) 16193799SwollmanZone America/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 16293799Swollman -4:16:48 - CMT 1920 May # Cordoba Mean Time 16319878Swollman -4:00 - ART 1930 Dec 16458787Sru -4:00 Arg AR%sT 1969 Oct 5 16593799Swollman -3:00 Arg AR%sT 1999 Oct 3 16693799Swollman -4:00 Arg AR%sT 2000 Mar 3 16764499Swollman -3:00 - ART 16820094Swollman# 16920094Swollman# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 17093799Swollman# Formosa (FM), Salta (SA), Tucuman (TM), Santiago del Estero (SE), 17193799Swollman# Cordoba (CB), La Rioja (LR), San Juan (SJ), San Luis (SL), La Pampa (LP), 17293799Swollman# Neuquen (NQ), Rio Negro (RN), Chubut (CH) 17320094Swollman# 17493799Swollman# Shanks also makes the following claims, which we haven't verified: 17593799Swollman# - Formosa switched to -3:00 on 1991-01-07. 17693799Swollman# - La Rioja and San Juan switched to -4:00 on 1991-03-01 177105196Swollman# and then to -3:00 on 1991-05-07. 17893799Swollman# - Misiones switched to -3:00 on 1990-12-29. 17993799Swollman# - Chaco switched to -3:00 on 1991-01-04. 18093799Swollman# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15, 18193799Swollman# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01. 18293799Swollman# - Santiago del Estero switched to -4:00 on 1991-04-01, 18393799Swollman# then to -3:00 on 1991-04-26. 18493799Swollman# If we need to add Zones for these areas, we may need to have a subdirectory 18593799Swollman# for Argentina, as e.g. "America/San_Luis" is too ambiguious. 18693799Swollman# 18793799SwollmanZone America/Cordoba -4:16:48 - LMT 1894 Oct 31 18893799Swollman -4:16:48 - CMT 1920 May 18920094Swollman -4:00 - ART 1930 Dec 19058787Sru -4:00 Arg AR%sT 1969 Oct 5 19193799Swollman -3:00 Arg AR%sT 1991 Mar 3 19293799Swollman -4:00 - WART 1991 Oct 20 19393799Swollman -3:00 Arg AR%sT 1999 Oct 3 19493799Swollman -4:00 Arg AR%sT 2000 Mar 3 19520094Swollman -3:00 - ART 19620094Swollman# 19720094Swollman# Jujuy (JY) 19893799SwollmanZone America/Jujuy -4:21:12 - LMT 1894 Oct 31 19993799Swollman -4:16:48 - CMT 1920 May 20020094Swollman -4:00 - ART 1930 Dec 20120094Swollman -4:00 Arg AR%sT 1969 Oct 5 20293799Swollman -3:00 Arg AR%sT 1990 Mar 4 20393799Swollman -4:00 - WART 1990 Oct 28 20493799Swollman -4:00 1:00 WARST 1991 Mar 17 20520094Swollman -4:00 - WART 1991 Oct 6 20693799Swollman -3:00 1:00 ARST 1992 20793799Swollman -3:00 Arg AR%sT 1999 Oct 3 20893799Swollman -4:00 Arg AR%sT 2000 Mar 3 20920094Swollman -3:00 - ART 21020094Swollman# 21120094Swollman# Catamarca (CT) 21293799SwollmanZone America/Catamarca -4:23:08 - LMT 1894 Oct 31 21393799Swollman -4:16:48 - CMT 1920 May 21420094Swollman -4:00 - ART 1930 Dec 21558787Sru -4:00 Arg AR%sT 1969 Oct 5 21693799Swollman -3:00 Arg AR%sT 1991 Mar 3 21793799Swollman -4:00 - WART 1991 Oct 20 21893799Swollman -3:00 Arg AR%sT 1999 Oct 3 21993799Swollman -4:00 Arg AR%sT 2000 Mar 3 22020094Swollman -3:00 - ART 22120094Swollman# 22220094Swollman# Mendoza (MZ) 22393799SwollmanZone America/Mendoza -4:35:16 - LMT 1894 Oct 31 22493799Swollman -4:16:48 - CMT 1920 May 22520094Swollman -4:00 - ART 1930 Dec 22620094Swollman -4:00 Arg AR%sT 1969 Oct 5 22793799Swollman -3:00 Arg AR%sT 1990 Mar 4 22893799Swollman -4:00 - WART 1990 Oct 15 22993799Swollman -4:00 1:00 WARST 1991 Mar 1 23020094Swollman -4:00 - WART 1991 Oct 15 23120094Swollman -4:00 1:00 WARST 1992 Mar 1 23220094Swollman -4:00 - WART 1992 Oct 18 23393799Swollman -3:00 Arg AR%sT 1999 Oct 3 23493799Swollman -4:00 Arg AR%sT 2000 Mar 3 23520094Swollman -3:00 - ART 2368029Swollman 23714343Swollman# Aruba 23814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23914343SwollmanZone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 24019878Swollman -4:30 - ANT 1965 # Netherlands Antilles Time 24114343Swollman -4:00 - AST 24214343Swollman 2432742Swollman# Bolivia 2442742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2452742SwollmanZone America/La_Paz -4:32:36 - LMT 1890 24686222Swollman -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 24719878Swollman -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 24819878Swollman -4:00 - BOT # Bolivia Time 2492742Swollman 2502742Swollman# Brazil 2512742Swollman 25219878Swollman# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 2532742Swollman# The mayor of Rio recently attempted to change the time zone rules 2542742Swollman# just in his city, in order to leave more summer time for the tourist trade. 2552742Swollman# The rule change lasted only part of the day; 2562742Swollman# the federal government refused to follow the city's rules, and business 2572742Swollman# was in a chaos, so the mayor backed down that afternoon. 2582742Swollman 25920094Swollman# From IATA SSIM (1996-02): 26020094Swollman# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 26120094Swollman# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 26220094Swollman# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 26320094Swollman# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 26420094Swollman# [The last three states are new to this issue of the IATA SSIM.] 26520094Swollman 26620094Swollman# From Gwillim Law (1996-10-07): 26720094Swollman# Geography, history (Tocantins was part of Goias until 1989), and other 26820094Swollman# sources of time zone information lead me to believe that AL, SE, and TO were 26920094Swollman# always in BR1, and so the only change was whether or not they observed DST.... 27020094Swollman# The earliest issue of the SSIM I have is 2/91. Each issue from then until 27120094Swollman# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 27220094Swollman# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 27320094Swollman# (UTC-4).... The other two time zones given for Brazil are BR3, which is 27420094Swollman# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 27520094Swollman# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 27620094Swollman# become part of the state of Pernambuco). The boundary between BR1 and BR2 27720094Swollman# has never been clearly stated. They've simply been called East and West. 27820094Swollman# However, some conclusions can be drawn from another IATA manual: the Airline 27920094Swollman# Coding Directory, which lists close to 400 airports in Brazil. For each 28020094Swollman# airport it gives a time zone which is coded to the SSIM. From that 28120094Swollman# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 28220094Swollman# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 28320094Swollman# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 28420094Swollman 28543014Swollman# From Marcos Tadeu (1998-09-27): 28643014Swollman# <a href="http://pcdsh01.on.br/verao1.html"> 28743014Swollman# Brazilian official page 28843014Swollman# </a> 28975267Swollman 29075267Swollman# From Jesper Norgaard (2000-11-03): 29175267Swollman# [For an official list of which regions in Brazil use which time zones, see:] 29275267Swollman# http://pcdsh01.on.br/Fusbr.htm 29375267Swollman# http://pcdsh01.on.br/Fusbrhv.htm 29475267Swollman 295105196Swollman# From Celso Doria via David Madeo (2002-10-09): 296105196Swollman# The reason for the delay this year has to do with elections in Brazil. 297105196Swollman# 298105196Swollman# Unlike in the United States, elections in Brazil are 100% computerized and 299105196Swollman# the results are known almost immediately. Yesterday, it was the first 300105196Swollman# round of the elections when 115 million Brazilians voted for President, 301105196Swollman# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 302105196Swollman# counting (or re-counting) votes anymore and we know there will be a second 303105196Swollman# round for the Presidency and also for some Governors. The 2nd round will 304105196Swollman# take place on October 27th. 305105196Swollman# 306105196Swollman# The reason why the DST will only begin November 3rd is that the thousands 307105196Swollman# of electoral machines used cannot have their time changed, and since the 308105196Swollman# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 309105196Swollman# the Government decided to postpone DST, instead of changing the Constitution 310105196Swollman# (maybe, for the next elections, it will be possible to change the clock)... 311105196Swollman 312105196Swollman# From Paul Eggert (2002-10-10): 313105196Swollman# The official decrees referenced below are mostly taken from 31443014Swollman# <a href="http://pcdsh01.on.br/DecHV.html"> 31543014Swollman# Decretos sobre o Horario de Verao no Brasil 316105196Swollman# </a> (2001-09-20, in Portuguese). 31767578Swollman# The official site for all decrees, including those not related to time, is 31867578Swollman# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/principal_ano.htm"> 31967578Swollman# Presidencia da Republica, Subchefia para Assuntos Juridicos, Decretos 32067578Swollman# </a> (in Portuguese). 32143014Swollman 3222742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 32343543Swollman# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) 32443543Swollman# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10) 32558787SruRule Brazil 1931 only - Oct 3 11:00 1:00 S 32658787SruRule Brazil 1932 1933 - Apr 1 0:00 0 - 32758787SruRule Brazil 1932 only - Oct 3 0:00 1:00 S 32843543Swollman# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) 32943014Swollman# revoked DST. 33043543Swollman# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) 33143543Swollman# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13) 33258787SruRule Brazil 1949 1952 - Dec 1 0:00 1:00 S 33358787SruRule Brazil 1950 only - Apr 16 1:00 0 - 33458787SruRule Brazil 1951 1952 - Apr 1 0:00 0 - 33543543Swollman# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) 33658787SruRule Brazil 1953 only - Mar 1 0:00 0 - 33743543Swollman# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) 33843014Swollman# revoked DST. 33943543Swollman# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18) 34043543Swollman# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 34143543Swollman# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 34243543Swollman# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03) 34343543Swollman# extended the above decree to all of the national territory on 12-09. 34458787SruRule Brazil 1963 only - Dec 9 0:00 1:00 S 34543543Swollman# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25) 34643543Swollman# extended summer time by one day to 1964-03-01 00:00 (start of school). 34758787SruRule Brazil 1964 only - Mar 1 0:00 0 - 34843543Swollman# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) 34958787SruRule Brazil 1965 only - Jan 31 0:00 1:00 S 35058787SruRule Brazil 1965 only - Mar 31 0:00 0 - 35143543Swollman# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) 35258787SruRule Brazil 1965 only - Dec 1 0:00 1:00 S 35343543Swollman# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) 35458787SruRule Brazil 1966 1968 - Mar 1 0:00 0 - 35558787SruRule Brazil 1966 1967 - Nov 1 0:00 1:00 S 35643543Swollman# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) 35743543Swollman# revoked DST. 35843543Swollman# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27) 35958787SruRule Brazil 1985 only - Nov 2 0:00 1:00 S 36043543Swollman# Decree 92,310 (1986-01-21) 36143543Swollman# Decree 92,463 (1986-03-13) 36258787SruRule Brazil 1986 only - Mar 15 0:00 0 - 36343543Swollman# Decree 93,316 (1986-10-01) 36458787SruRule Brazil 1986 only - Oct 25 0:00 1:00 S 36558787SruRule Brazil 1987 only - Feb 14 0:00 0 - 36643543Swollman# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) 36758787SruRule Brazil 1987 only - Oct 25 0:00 1:00 S 36858787SruRule Brazil 1988 only - Feb 7 0:00 0 - 36943543Swollman# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12) 37043543Swollman# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 37158787SruRule Brazil 1988 only - Oct 16 0:00 1:00 S 37258787SruRule Brazil 1989 only - Jan 29 0:00 0 - 37343543Swollman# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21) 37443543Swollman# with the same exceptions 37558787SruRule Brazil 1989 only - Oct 15 0:00 1:00 S 37658787SruRule Brazil 1990 only - Feb 11 0:00 0 - 37743543Swollman# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17) 37843543Swollman# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 37943543Swollman# Decree 99,629 (1990-10-19) adds BA, MT. 38058787SruRule Brazil 1990 only - Oct 21 0:00 1:00 S 38158787SruRule Brazil 1991 only - Feb 17 0:00 0 - 38243543Swollman# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25) 38343543Swollman# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 38458787SruRule Brazil 1991 only - Oct 20 0:00 1:00 S 38558787SruRule Brazil 1992 only - Feb 9 0:00 0 - 38643543Swollman# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16) 38743543Swollman# adopted by same states. 38858787SruRule Brazil 1992 only - Oct 25 0:00 1:00 S 38958787SruRule Brazil 1993 only - Jan 31 0:00 0 - 39043014Swollman# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) 39143543Swollman# adopted by same states, plus AM. 39243543Swollman# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22) 39343543Swollman# adopted by same states, minus AM. 39443543Swollman# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) 39543543Swollman# adopted by same states, plus TO. 39643543Swollman# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13) 39743543Swollman# adds AL, SE. 39858787SruRule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 39958787SruRule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 40058787SruRule Brazil 1996 only - Feb 11 0:00 0 - 40143543Swollman# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04) 40243543Swollman# adopted by same states, minus AL, SE. 40358787SruRule Brazil 1996 only - Oct 6 0:00 1:00 S 40458787SruRule Brazil 1997 only - Feb 16 0:00 0 - 40543014Swollman# From Daniel C. Sobral <dcs@gns.com.br> (1998-02-12): 40643014Swollman# In 1997, the DS began on October 6. The stated reason was that 40743014Swollman# because international television networks ignored Brazil's policy on DS, 40843014Swollman# they bought the wrong times on satellite for coverage of Pope's visit. 40943014Swollman# This year, the ending date of DS was postponed to March 1 41043014Swollman# to help dealing with the shortages of electric power. 41143014Swollman# 41243014Swollman# From Paul Eggert (1998-02-25): 41343014Swollman# <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm"> 41443014Swollman# Brazil Prepares for Papal Visit 41543014Swollman# </a>, 41643014Swollman# Church Net UK (1997-10-02). 41743014Swollman# 41843543Swollman# Decree 2,317 (1997-09-04), adopted by same states. 41958787SruRule Brazil 1997 only - Oct 6 0:00 1:00 S 42043543Swollman# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> 42143014Swollman# (1998-02-10) 42258787SruRule Brazil 1998 only - Mar 1 0:00 0 - 42343543Swollman# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11) 42458787Sru# adopted by the same states as before. 42558787SruRule Brazil 1998 only - Oct 11 0:00 1:00 S 42658787SruRule Brazil 1999 only - Feb 21 0:00 0 - 42758787Sru# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> 42858787Sru# (1999-08-23) adopted by same states. 42958787Sru# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30) 43067578Swollman# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 43167578SwollmanRule Brazil 1999 only - Oct 3 0:00 1:00 S 43267578SwollmanRule Brazil 2000 only - Feb 27 0:00 0 - 43367578Swollman# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) 43467578Swollman# adopted by the same states as before. 43575267Swollman# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) 43675267Swollman# repeals DST in PE and RR, effective 2000-10-15 00:00. 43775267Swollman# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) 43875267Swollman# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 43986222Swollman# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> 44086222Swollman# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 441105196SwollmanRule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 442105196SwollmanRule Brazil 2001 max - Feb Sun>=15 0:00 0 - 443105196Swollman# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 444105196Swollman# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a> 445105196SwollmanRule Brazil 2002 only - Nov 3 0:00 1:00 S 446121098Swollman# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 447121098Swollman# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a> 448121098SwollmanRule Brazil 2003 max - Oct Sun>=15 0:00 1:00 S 449121098Swollman# The latest ruleset listed above says that the following states observe DST: 450121098Swollman# DF, ES, GO, MG, MS, PR, RJ, RS, SC, SP. 45175267Swollman# 452121098Swollman# For dates after mid-2004, the above rules with TO="max" are guesses 45358787Sru# and are quite possibly wrong, but are more likely than no DST at all. 45420094Swollman 45543014Swollman 4562742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 45720094Swollman# 45875267Swollman# Atlantic islands: Fernando de Noronha, Trindade, Martin Vaz, 45975267Swollman# Atol das Rocas, and Penedos de Sao Pedro e Sao Paulo 4602742SwollmanZone America/Noronha -2:09:40 - LMT 1914 46158787Sru -2:00 Brazil FN%sT 1990 Sep 17 46258787Sru -2:00 - FNT 46320094Swollman# 46458787Sru# Amapa (AP), east Para (PA) 46575267Swollman# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. 466121098Swollman# The division between east and west Para is the river Xingu. 467121098Swollman# In the north a very small part from the river Javary (now Jari I guess, 468121098Swollman# the border with Amapa) to the Amazon, then to the Xingu. 46943543SwollmanZone America/Belem -3:13:56 - LMT 1914 47058787Sru -3:00 Brazil BR%sT 1988 Sep 12 47158787Sru -3:00 - BRT 47243543Swollman# 47358787Sru# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), 47475267Swollman# Paraiba (PB) 47520094SwollmanZone America/Fortaleza -2:34:00 - LMT 1914 47658787Sru -3:00 Brazil BR%sT 1990 Sep 17 47758787Sru -3:00 - BRT 1999 Sep 30 47875267Swollman -3:00 Brazil BR%sT 2000 Oct 22 47986222Swollman -3:00 - BRT 2001 Sep 13 480105196Swollman -3:00 Brazil BR%sT 2002 Oct 1 481105196Swollman -3:00 - BRT 48220094Swollman# 48375267Swollman# Pernambuco (PE) (except Atlantic islands) 48475267SwollmanZone America/Recife -2:19:36 - LMT 1914 48575267Swollman -3:00 Brazil BR%sT 1990 Sep 17 48675267Swollman -3:00 - BRT 1999 Sep 30 48775267Swollman -3:00 Brazil BR%sT 2000 Oct 15 48886222Swollman -3:00 - BRT 2001 Sep 13 489105196Swollman -3:00 Brazil BR%sT 2002 Oct 1 490105196Swollman -3:00 - BRT 49175267Swollman# 49258787Sru# Tocantins (TO) 49343543SwollmanZone America/Araguaina -3:12:48 - LMT 1914 49458787Sru -3:00 Brazil BR%sT 1990 Sep 17 49558787Sru -3:00 - BRT 1995 Sep 14 496121098Swollman -3:00 Brazil BR%sT 2003 Sep 24 497121098Swollman -3:00 - BRT 49820094Swollman# 49958787Sru# Alagoas (AL), Sergipe (SE) 50043543SwollmanZone America/Maceio -2:22:52 - LMT 1914 50158787Sru -3:00 Brazil BR%sT 1990 Sep 17 50258787Sru -3:00 - BRT 1995 Oct 13 50358787Sru -3:00 Brazil BR%sT 1996 Sep 4 50458787Sru -3:00 - BRT 1999 Sep 30 50575267Swollman -3:00 Brazil BR%sT 2000 Oct 22 50686222Swollman -3:00 - BRT 2001 Sep 13 507105196Swollman -3:00 Brazil BR%sT 2002 Oct 1 508105196Swollman -3:00 - BRT 50943543Swollman# 510121098Swollman# Bahia (BA) 511121098Swollman# There are too many Salvadors elsewhere, so use America/Bahia instead 512121098Swollman# of America/Salvador. 513121098SwollmanZone America/Bahia -2:34:04 - LMT 1914 514121098Swollman -3:00 Brazil BR%sT 2003 Sep 24 515121098Swollman -3:00 - BRT 516121098Swollman# 517121098Swollman# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), 51858787Sru# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), 51958787Sru# Santa Catarina (SC), Rio Grande do Sul (RS) 5202742SwollmanZone America/Sao_Paulo -3:06:28 - LMT 1914 52158787Sru -3:00 Brazil BR%sT 1963 Oct 23 00:00 52258787Sru -3:00 1:00 BRST 1964 52358787Sru -3:00 Brazil BR%sT 52420094Swollman# 525121098Swollman# Mato Grosso do Sul (MS) 526121098SwollmanZone America/Campo_Grande -3:38:28 - LMT 1914 52758787Sru -4:00 Brazil AM%sT 52820094Swollman# 529121098Swollman# Mato Grosso (MT) 530121098SwollmanZone America/Cuiaba -3:44:20 - LMT 1914 531121098Swollman -4:00 Brazil AM%sT 2003 Sep 24 532121098Swollman -4:00 - AMT 533121098Swollman# 53458787Sru# west Para (PA), Rondonia (RO) 53575267Swollman# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. 53643543SwollmanZone America/Porto_Velho -4:15:36 - LMT 1914 53758787Sru -4:00 Brazil AM%sT 1988 Sep 12 53858787Sru -4:00 - AMT 53943543Swollman# 54058787Sru# Roraima (RR) 54158787SruZone America/Boa_Vista -4:02:40 - LMT 1914 54258787Sru -4:00 Brazil AM%sT 1988 Sep 12 54358787Sru -4:00 - AMT 1999 Sep 30 54475267Swollman -4:00 Brazil AM%sT 2000 Oct 15 54575267Swollman -4:00 - AMT 54658787Sru# 54775267Swollman# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto 548121098Swollman# The great circle line from Tabatinga to Porto Acre divides 549121098Swollman# east from west Amazonas. 5502742SwollmanZone America/Manaus -4:00:04 - LMT 1914 55158787Sru -4:00 Brazil AM%sT 1988 Sep 12 55258787Sru -4:00 - AMT 1993 Sep 28 55358787Sru -4:00 Brazil AM%sT 1994 Sep 22 55458787Sru -4:00 - AMT 55520094Swollman# 55675267Swollman# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 55775267Swollman# Eirunepe, Envira, Ipixuna 55875267SwollmanZone America/Eirunepe -4:39:28 - LMT 1914 55975267Swollman -5:00 Brazil AC%sT 1988 Sep 12 56075267Swollman -5:00 - ACT 1993 Sep 28 56175267Swollman -5:00 Brazil AC%sT 1994 Sep 22 56275267Swollman -5:00 - ACT 56375267Swollman# 56458787Sru# Acre (AC) 56575267SwollmanZone America/Rio_Branco -4:31:12 - LMT 1914 56658787Sru -5:00 Brazil AC%sT 1988 Sep 12 56758787Sru -5:00 - ACT 5682742Swollman 5692742Swollman 5702742Swollman# Chile 5712742Swollman 57214343Swollman# From Eduardo Krell (1995-10-19): 57314343Swollman# The law says to switch to DST at midnight [24:00] on the second SATURDAY 57414343Swollman# of October.... The law is the same for March and October. 57543014Swollman# (1998-09-29): 57643014Swollman# Because of the drought this year, the government decided to go into 57743014Swollman# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 57843014Swollman# (unless there's another dry season next year, I guess). 5792742Swollman 58058787Sru# From Julio I. Pacheco Troncoso (1999-03-18): 58158787Sru# Because of the same drought, the government decided to end DST later, 58258787Sru# on April 3, (one-time change). 58358787Sru 58486222Swollman# From Gwillim Law (2001-05-04): 58586222Swollman# I came across another article in "La Tercera" about Chilean DST. 58686222Swollman# <http://www.tercera.cl/diario/2000/10/13/t-extras.html> 58786222Swollman# It clearly confirms my earlier suggestion, that DST begins at 22:00 58886222Swollman# on Easter Island.... But it also seems to be saying that the 58986222Swollman# observance of DST in Chile began in 1966, rather than 1969 as 59086222Swollman# ... [Shanks] has it.... 59186222Swollman# 59286222Swollman# My translation: 59386222Swollman# 59486222Swollman# "The Chilean Army has announced that summer time will begin tomorrow, 59586222Swollman# Saturday, October 14 in continental Chile, insular Chile, and 59686222Swollman# Antarctica, as provided by Supreme Decree 25 of January 11, 1966. 59786222Swollman# By the preceding, official time in continental Chile and Chilean 59886222Swollman# Antarctic, and official time in Western Insular Chile, which applies 59986222Swollman# to Easter Island and Sala y Gomez Island, will be set forward at 60086222Swollman# midnight and at 22:00, respectively, by 20 minutes." 60175267Swollman 60286222Swollman# From Paul Eggert (2001-05-04): 60386222Swollman# Go with this article in preference to Shanks's 1969 date for modern DST. 60475267Swollman# Assume this rule has been used since DST was introduced in the islands. 60575267Swollman 606114173Swollman# From Paul Eggert (2002-10-24): 607114173Swollman# <http://www.shoa.cl/shoa/faqhoraoficial.htm> gives many details that 608114173Swollman# disagree with the following table, but we haven't had time to compare them. 609114173Swollman 6102742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 61158787SruRule Chile 1918 only - Sep 1 0:00 1:00 S 61258787SruRule Chile 1919 only - Jul 2 0:00 0 - 61358787SruRule Chile 1927 1931 - Sep 1 0:00 1:00 S 61458787SruRule Chile 1928 1932 - Apr 1 0:00 0 - 61586222SwollmanRule Chile 1966 1997 - Oct Sun>=9 4:00u 1:00 S 61686222SwollmanRule Chile 1967 1998 - Mar Sun>=9 3:00u 0 - 61775267SwollmanRule Chile 1998 only - Sep 27 4:00u 1:00 S 61875267SwollmanRule Chile 1999 only - Apr 4 3:00u 0 - 61975267SwollmanRule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S 62075267SwollmanRule Chile 2000 max - Mar Sun>=9 3:00u 0 - 62120094Swollman# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; 62258787Sru# (1996-09) says 1998-03-08. Ignore these. 6232742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 6242742SwollmanZone America/Santiago -4:42:40 - LMT 1890 62519878Swollman -4:42:40 - SMT 1910 # Santiago Mean Time 62619878Swollman -5:00 Chile CL%sT 1932 Sep # Chile Time 62719878Swollman -4:00 Chile CL%sT 6282742SwollmanZone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri 62919878Swollman -7:17:28 - MMT 1932 Sep # Mataveri Mean Time 63019878Swollman -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time 63119878Swollman -6:00 Chile EAS%sT 6322742Swollman# 63386222Swollman# Sala y Gomez Island is like Pacific/Easter. 63486222Swollman# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, 63586222Swollman# San Felix, and Antarctic bases, are like America/Santiago. 6362742Swollman 6372742Swollman# Colombia 63858787Sru# Shanks specifies 24:00 for 1992 transition times; go with IATA, 63958787Sru# as it seems implausible to change clocks at midnight New Year's Eve. 64020094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 64120094SwollmanRule CO 1992 only - May 2 0:00 1:00 S 64220094SwollmanRule CO 1992 only - Dec 31 0:00 0 - 6432742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 6442742SwollmanZone America/Bogota -4:56:20 - LMT 1884 Mar 13 64519878Swollman -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 64620094Swollman -5:00 CO CO%sT # Colombia Time 6472742Swollman# Malpelo, Providencia, San Andres 6482742Swollman# no information; probably like America/Bogota 6492742Swollman 6502742Swollman# Curacao 65158787Sru# Shanks says that Bottom and Oranjestad have been at -4:00 since 65243014Swollman# standard time was introduced on 1912-03-02; and that Kralendijk and Rincon 65343014Swollman# used Kralendijk Mean Time (-4:33:08) from 1912-02-02 to 1965-01-01. 65443014Swollman# This all predates our 1970 cutoff, though. 6552742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 6562742SwollmanZone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 65719878Swollman -4:30 - ANT 1965 # Netherlands Antilles Time 6582742Swollman -4:00 - AST 6592742Swollman 6602742Swollman# Ecuador 6612742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 6622742SwollmanZone America/Guayaquil -5:19:20 - LMT 1890 66319878Swollman -5:14:00 - QMT 1931 # Quito Mean Time 66419878Swollman -5:00 - ECT # Ecuador Time 6652742SwollmanZone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 66619878Swollman -5:00 - ECT 1986 66719878Swollman -6:00 - GALT # Galapagos Time 6682742Swollman 6692742Swollman# Falklands 67075267Swollman 67175267Swollman# From Paul Eggert (2001-03-05): 67275267Swollman# Between 1990 and 2000 inclusive, Shanks and the IATA agree except 67375267Swollman# the IATA gives 1996-09-08. Go with Shanks. 67475267Swollman 67575267Swollman# From Falkland Islands Government Office, London (2001-01-22) 67675267Swollman# via Jesper Norgaard: 67775267Swollman# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 67875267Swollman# April 2001 and advance one hour to summer time at 2 am on Sunday 2 67975267Swollman# September. It is anticipated that the clocks will revert back at 2 68075267Swollman# am on Sunday 21 April 2002 and advance to summer time at 2 am on 68175267Swollman# Sunday 1 September. 68275267Swollman 68375267Swollman# From Rives McDow (2001-02-13): 68475267Swollman# 68575267Swollman# I have communicated several times with people there, and the last 68675267Swollman# time I had communications that was helpful was in 1998. Here is 68775267Swollman# what was said then: 68875267Swollman# 68975267Swollman# "The general rule was that Stanley used daylight saving and the Camp 69075267Swollman# did not. However for various reasons many people in the Camp have 69175267Swollman# started to use daylight saving (known locally as 'Stanley Time') 69275267Swollman# There is no rule as to who uses daylight saving - it is a matter of 69375267Swollman# personal choice and so it is impossible to draw a map showing who 69475267Swollman# uses it and who does not. Any list would be out of date as soon as 69575267Swollman# it was produced. This year daylight saving ended on April 18/19th 69675267Swollman# and started again on September 12/13th. I do not know what the rule 69775267Swollman# is, but can find out if you like. We do not change at the same time 69875267Swollman# as UK or Chile." 69975267Swollman# 70075267Swollman# I did have in my notes that the rule was "Second Saturday in Sep at 70175267Swollman# 0:00 until third Saturday in Apr at 0:00". I think that this does 70275267Swollman# not agree in some cases with Shanks; is this true? 70375267Swollman# 70475267Swollman# Also, there is no mention in the list that some areas in the 70575267Swollman# Falklands do not use DST. I have found in my communications there 70675267Swollman# that these areas are on the western half of East Falkland and all of 70775267Swollman# West Falkland. Stanley is the only place that consistently observes 70875267Swollman# DST. Again, as in other places in the world, the farmers don't like 70975267Swollman# it. West Falkland is almost entirely sheep farmers. 71075267Swollman# 71175267Swollman# I know one lady there that keeps a list of which farm keeps DST and 71275267Swollman# which doesn't each year. She runs a shop in Stanley, and says that 71375267Swollman# the list changes each year. She uses it to communicate to her 71475267Swollman# customers, catching them when they are home for lunch or dinner. 71575267Swollman 71675267Swollman# From Paul Eggert (2001-03-05): 71775267Swollman# For now, we'll just record the time in Stanley, since we have no 71875267Swollman# better info. 71975267Swollman 7202742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 72119878SwollmanRule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 72219878SwollmanRule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 72319878SwollmanRule Falk 1939 only - Oct 1 0:00 1:00 S 72419878SwollmanRule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 72519878SwollmanRule Falk 1943 only - Jan 1 0:00 0 - 72619878SwollmanRule Falk 1983 only - Sep lastSun 0:00 1:00 S 72719878SwollmanRule Falk 1984 1985 - Apr lastSun 0:00 0 - 72819878SwollmanRule Falk 1984 only - Sep 16 0:00 1:00 S 72975267SwollmanRule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 73075267SwollmanRule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 73175267SwollmanRule Falk 2001 max - Apr Sun>=15 2:00 0 - 73275267SwollmanRule Falk 2001 max - Sep Sun>=1 2:00 1:00 S 7332742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 7342742SwollmanZone Atlantic/Stanley -3:51:24 - LMT 1890 73519878Swollman -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 73619878Swollman -4:00 Falk FK%sT 1983 May # Falkland Is Time 73719878Swollman -3:00 Falk FK%sT 1985 Sep 15 73819878Swollman -4:00 Falk FK%sT 7392742Swollman 7402742Swollman# French Guiana 7412742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 7422742SwollmanZone America/Cayenne -3:29:20 - LMT 1911 Jul 74319878Swollman -4:00 - GFT 1967 Oct # French Guiana Time 74419878Swollman -3:00 - GFT 7452742Swollman 7462742Swollman# Guyana 7472742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 7482742SwollmanZone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 74919878Swollman -3:45 - GBGT 1966 May 26 # Br Guiana Time 75019878Swollman -3:45 - GYT 1975 Jul 31 # Guyana Time 75120094Swollman -3:00 - GYT 1991 75220094Swollman# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 75320094Swollman -4:00 - GYT 7542742Swollman 7552742Swollman# Paraguay 75658787Sru# From Paul Eggert (1999-10-29): 75758787Sru# Shanks (1999) says that spring transitions are from 01:00 -> 02:00, 75858787Sru# and autumn transitions are from 00:00 -> 23:00. Go with earlier 75958787Sru# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 7602742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 76158787SruRule Para 1975 1988 - Oct 1 0:00 1:00 S 76219878SwollmanRule Para 1975 1978 - Mar 1 0:00 0 - 76358787SruRule Para 1979 1991 - Apr 1 0:00 0 - 76419878SwollmanRule Para 1989 only - Oct 22 0:00 1:00 S 76520094SwollmanRule Para 1990 only - Oct 1 0:00 1:00 S 76620094SwollmanRule Para 1991 only - Oct 6 0:00 1:00 S 76720094SwollmanRule Para 1992 only - Mar 1 0:00 0 - 76820094SwollmanRule Para 1992 only - Oct 5 0:00 1:00 S 76920094SwollmanRule Para 1993 only - Mar 31 0:00 0 - 77030711SwollmanRule Para 1993 1995 - Oct 1 0:00 1:00 S 77120094SwollmanRule Para 1994 1995 - Feb lastSun 0:00 0 - 77258787SruRule Para 1996 only - Mar 1 0:00 0 - 77375267Swollman# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 77467578Swollman# From Steffen Thorsen (2000-10-02): 77567578Swollman# I have three independent reports that Paraguay changed to DST this Sunday 77667578Swollman# (10-01). 77775267Swollman# 77875267Swollman# Translated by Gwillim Law (2001-02-27) from 77975267Swollman# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> 78075267Swollman# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) 78175267Swollman# </a>: 78275267Swollman# Starting at 0:00 today, the clock will be set forward 60 minutes, in 78375267Swollman# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 78475267Swollman# system has been operating for several years. Formerly there was a separate 78575267Swollman# decree each year; the new law has the same effect, but permanently. Every 78675267Swollman# year, the time will change on the first Sunday of October; likewise, the 78775267Swollman# clock will be set back on the first Sunday of March. 78875267Swollman# 78975267Swollman# From Jesper Norgaard (2001-03-06) [an official URL saying similar things]: 79075267Swollman# http://gateway.abc.com.py:8000/pub/pag04.mbr/artic?FHA=2001-03-03-02.24.52.900592 79175267Swollman# 79293799SwollmanRule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 79375267Swollman# IATA SSIM (1997-09) says Mar 1; go with Shanks. 79475267SwollmanRule Para 1997 only - Feb lastSun 0:00 0 - 79575267Swollman# Shanks says 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 79675267Swollman# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 79793799SwollmanRule Para 1998 2001 - Mar Sun>=1 0:00 0 - 79893799Swollman# From Rives McDow (2002-02-28): 79993799Swollman# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 80093799Swollman# dst method to be from the first Sunday in September to the first Sunday in 80193799Swollman# April. 80293799SwollmanRule Para 2002 max - Apr Sun>=1 0:00 0 - 80393799SwollmanRule Para 2002 max - Sep Sun>=1 0:00 1:00 S 80475267Swollman 80593799Swollman 8062742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8072742SwollmanZone America/Asuncion -3:50:40 - LMT 1890 80819878Swollman -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 80919878Swollman -4:00 - PYT 1972 Oct # Paraguay Time 81019878Swollman -3:00 - PYT 1974 Apr 81119878Swollman -4:00 Para PY%sT 8122742Swollman 8132742Swollman# Peru 8142742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 81519878SwollmanRule Peru 1938 only - Jan 1 0:00 1:00 S 81619878SwollmanRule Peru 1938 only - Apr 1 0:00 0 - 81719878SwollmanRule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 81819878SwollmanRule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 81919878SwollmanRule Peru 1987 only - Jan 1 0:00 1:00 S 82019878SwollmanRule Peru 1987 only - Apr 1 0:00 0 - 82119878SwollmanRule Peru 1990 only - Jan 1 0:00 1:00 S 82219878SwollmanRule Peru 1990 only - Apr 1 0:00 0 - 82358787Sru# IATA is ambiguous for 1993/1995; go with Shanks. 82458787SruRule Peru 1994 only - Jan 1 0:00 1:00 S 82558787SruRule Peru 1994 only - Apr 1 0:00 0 - 8262742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8272742SwollmanZone America/Lima -5:08:12 - LMT 1890 82886222Swollman -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 82919878Swollman -5:00 Peru PE%sT # Peru Time 8302742Swollman 8312742Swollman# South Georgia 8322742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8332742SwollmanZone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 83419878Swollman -2:00 - GST # South Georgia Time 8352742Swollman 8362742Swollman# South Sandwich Is 83758787Sru# uninhabited; scientific personnel have wintered 8382742Swollman 8392742Swollman# Suriname 8402742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8412742SwollmanZone America/Paramaribo -3:40:40 - LMT 1911 8422742Swollman -3:40:52 - PMT 1935 # Paramaribo Mean Time 8432742Swollman -3:40:36 - PMT 1945 Oct # The capital moved? 84419878Swollman -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 84519878Swollman -3:30 - SRT 1984 Oct # Suriname Time 84619878Swollman -3:00 - SRT 8472742Swollman 8482742Swollman# Trinidad and Tobago 8492742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8502742SwollmanZone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 8512742Swollman -4:00 - AST 8522742Swollman 8532742Swollman# Uruguay 85419878Swollman# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 8552742Swollman# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 85658787Sru# From Shanks: 8572742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 8582742Swollman# Whitman gives 1923 Oct 1; go with Shanks. 85919878SwollmanRule Uruguay 1923 only - Oct 2 0:00 0:30 HS 86019878SwollmanRule Uruguay 1924 1926 - Apr 1 0:00 0 - 86119878SwollmanRule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 86219878SwollmanRule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 8632742Swollman# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman. 86419878SwollmanRule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 86519878SwollmanRule Uruguay 1936 only - Nov 1 0:00 0:30 HS 86619878SwollmanRule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 8672742Swollman# Whitman gives 1937 Oct 3; go with Shanks. 86819878SwollmanRule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 8692742Swollman# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 8702742Swollman# and 1943 Apr 13 ``to present time''; go with Shanks. 87119878SwollmanRule Uruguay 1941 only - Aug 1 0:00 0 - 87219878SwollmanRule Uruguay 1942 only - Jan 1 0:00 0:30 HS 87319878SwollmanRule Uruguay 1942 only - Dec 14 0:00 1:00 S 87419878SwollmanRule Uruguay 1943 only - Mar 14 0:00 0 - 87519878SwollmanRule Uruguay 1959 only - May 24 0:00 1:00 S 87619878SwollmanRule Uruguay 1959 only - Nov 15 0:00 0 - 87719878SwollmanRule Uruguay 1960 only - Jan 17 0:00 1:00 S 87819878SwollmanRule Uruguay 1960 only - Mar 6 0:00 0 - 87919878SwollmanRule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 88019878SwollmanRule Uruguay 1965 only - Sep 26 0:00 0 - 88119878SwollmanRule Uruguay 1966 1967 - Oct 31 0:00 0 - 88219878SwollmanRule Uruguay 1968 1970 - May 27 0:00 0:30 HS 88319878SwollmanRule Uruguay 1968 1970 - Dec 2 0:00 0 - 88419878SwollmanRule Uruguay 1972 only - Apr 24 0:00 1:00 S 88519878SwollmanRule Uruguay 1972 only - Aug 15 0:00 0 - 88619878SwollmanRule Uruguay 1974 only - Mar 10 0:00 0:30 HS 88719878SwollmanRule Uruguay 1974 only - Dec 22 0:00 1:00 S 88819878SwollmanRule Uruguay 1976 only - Oct 1 0:00 0 - 88919878SwollmanRule Uruguay 1977 only - Dec 4 0:00 1:00 S 89019878SwollmanRule Uruguay 1978 only - Apr 1 0:00 0 - 89119878SwollmanRule Uruguay 1979 only - Oct 1 0:00 1:00 S 89219878SwollmanRule Uruguay 1980 only - May 1 0:00 0 - 89319878SwollmanRule Uruguay 1987 only - Dec 14 0:00 1:00 S 89419878SwollmanRule Uruguay 1988 only - Mar 14 0:00 0 - 89519878SwollmanRule Uruguay 1988 only - Dec 11 0:00 1:00 S 89619878SwollmanRule Uruguay 1989 only - Mar 12 0:00 0 - 89719878SwollmanRule Uruguay 1989 only - Oct 29 0:00 1:00 S 89858787Sru# Shanks says no DST was observed in 1990/1 and 1991/2, 89958787Sru# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 90020094SwollmanRule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 90120094SwollmanRule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 90230711SwollmanRule Uruguay 1992 only - Oct 18 0:00 1:00 S 90320094SwollmanRule Uruguay 1993 only - Feb 28 0:00 0 - 9042742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9052742SwollmanZone America/Montevideo -3:44:44 - LMT 1898 Jun 28 90619878Swollman -3:44:44 - MMT 1920 May 1 # Montevideo MT 90719878Swollman -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 90819878Swollman -3:00 Uruguay UY%sT 9092742Swollman 9102742Swollman# Venezuela 9112742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9122742SwollmanZone America/Caracas -4:27:44 - LMT 1890 91386222Swollman -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 91419878Swollman -4:30 - VET 1965 # Venezuela Time 91519878Swollman -4:00 - VET 916