X-Git-Url: https://git.saurik.com/apple/system_cmds.git/blobdiff_plain/1815bff58803503e37009deeb85cfa8c22acf9d9..2fc1e207eccd68aee093ed29dae719e77bac17dd:/zic.tproj/datfiles/southamerica diff --git a/zic.tproj/datfiles/southamerica b/zic.tproj/datfiles/southamerica index 2e27ed0..9124910 100644 --- a/zic.tproj/datfiles/southamerica +++ b/zic.tproj/datfiles/southamerica @@ -1,16 +1,15 @@ -# $OpenBSD: southamerica,v 1.4 1997/01/14 04:36:57 millert Exp $ -# @(#)southamerica 7.16 +# @(#)southamerica 7.54 # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to # tz@elsie.nci.nih.gov for general use in the future). -# From Paul Eggert (1996-11-22): +# From Paul Eggert (1999-07-07): # A good source for time zone historical data outside the U.S. is -# Thomas G. Shanks, The International Atlas (3rd edition), -# San Diego: ACS Publications, Inc. (1991). +# Thomas G. Shanks, The International Atlas (5th edition), +# San Diego: ACS Publications, Inc. (1999). # -# Gwillim Law writes that a good source +# Gwillim Law writes that a good source # for recent time zone data is the International Air Transport # Association's Standard Schedules Information Manual (IATA SSIM), # published semiannually. Law sent in several helpful summaries @@ -19,17 +18,6 @@ # Except where otherwise noted, Shanks is the source for entries through 1990, # and IATA SSIM is the source for entries after 1990. # -# The following abbreviations are used in this file. -# Corrections are welcome! -# std dst -# LMT Local Mean Time -# -2:00 FST FDT Fernando de Noronha -# -3:00 EST EDT Eastern Brazil -# -4:00 WST WDT Western Brazil -# -4:00 AST ADT Atlantic -# -5:00 AST ADT Acre -# -# See the `africa' file for time zone naming and abbreviation conventions. # Earlier editions of these tables used the North American style (e.g. ARST and # ARDT for Argentine Standard and Daylight Time), but the following quote # suggests that it's better to use European style (e.g. ART and ARST). @@ -38,15 +26,24 @@ # in Europe and South America. # -- E O Cutler, _New York Times_ (1937-02-14), quoted in # H L Mencken, _The American Language: Supplement I_ (1960), p 466 - - -# From Guy Harris: -# From Official Airline Guide - Worldwide Edition (1987). Countries not -# listed here do not observe DST, according to the OAG. Time zone names -# are pure inventions, and none are supplied for countries not observing -# DST; updates from natives would be appreciated. The times that DST -# starts and ends are based on the assumption that they switch a 2AM just -# as everybody else does. +# +# Earlier editions of these tables also used the North American style +# for time zones in Brazil, but this was incorrect, as Brazilians say +# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in +# the railroad sector, writes (1999-07-06): +# The subject of time zones is currently a matter of discussion/debate in +# Brazil. Let's say that "the Brasilia time" is considered the +# "official time" because Brasilia is the capital city. +# The other three time zones are called "Brasilia time "minus one" or +# "plus one" or "plus two". As far as I know there is no such +# name/designation as "Eastern Time" or "Central Time". +# So I invented the following (English-language) abbreviations for now. +# Corrections are welcome! +# std dst +# -2:00 FNT FNST Fernando de Noronha +# -3:00 BRT BRST Brasilia +# -4:00 AMT AMST Amazon +# -5:00 ACT ACST Acre ############################################################################### @@ -82,18 +79,11 @@ Rule Arg 1963 only - Oct 1 0:00 0 - Rule Arg 1963 only - Dec 15 0:00 1:00 S Rule Arg 1964 1966 - Mar 1 0:00 0 - Rule Arg 1964 1966 - Oct 15 0:00 1:00 S -Rule Arg 1967 only - Apr 1 0:00 0 - -Rule Arg 1967 1968 - Oct Sun<=7 0:00 1:00 S -Rule Arg 1968 1969 - Apr Sun<=7 0:00 0 - +Rule Arg 1967 only - Apr 2 0:00 0 - +Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S +Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - Rule Arg 1974 only - Jan 23 0:00 1:00 S Rule Arg 1974 only - May 1 0:00 0 - -Rule Arg 1974 1976 - Oct Sun<=7 0:00 1:00 S -Rule Arg 1975 1977 - Apr Sun<=7 0:00 0 - -Rule Arg 1985 only - Nov 2 0:00 1:00 S -Rule Arg 1986 only - Mar 14 0:00 0 - -Rule Arg 1986 1987 - Oct 25 0:00 1:00 S -Rule Arg 1987 only - Feb 13 0:00 0 - -Rule Arg 1988 only - Feb 7 0:00 0 - Rule Arg 1988 only - Dec 1 0:00 1:00 S # # From Hernan G. Otero (1995-06-26): @@ -102,7 +92,7 @@ Rule Arg 1988 only - Dec 1 0:00 1:00 S # Talleres de Hidrografia Naval Argentina # (Argentine Naval Hydrography Institute) # -# Shanks gives 1989 Mar 16 and stops after 1990 Mar 4; go with Otero. +# Shanks stops after 1992-03-01; go with Otero. Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S # @@ -111,64 +101,262 @@ Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S # time corrections was derogated and no more modifications # to the time zones (for daylight saving) are now made. # +# From Rives McDow (2000-01-10): +# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, +# which did not result in the switch of a time zone, as they stayed 9 hours +# from the International Date Line. +Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S +Rule Arg 2000 only - Mar Sun>=1 0:00 0 - +# +# From Peter Gradelski via Steffen Thorsen (2000-03-01): +# We just checked with our Sao Paulo office and they say the government of +# Argentina decided not to become one of the countries that go on or off DST. +# So Buenos Aires should be -3 hours from GMT at all times. +# +# From Fabian L. Arce Jofre (2000-04-04): +# The law that claimed DST for Argentina was derogated by President Fernando +# de la Rua on March 2, 2000, because it would make people spend more energy +# in the winter time, rather than less. The change took effect on March 3. +# +# From Mariano Absatz (2001-06-06): +# one of the major newspapers here in Argentina said that the 1999 +# Timezone Law (which never was effectively applied) will (would?) be +# in effect.... The article is at +# http://ar.clarin.com/diario/2001-06-06/e-01701.htm +# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted +# 1999-09-17, and published 1999-09-21. The official publication is at: +# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF +# Regretfully, you have to subscribe (and pay) for the on-line version.... +# +# (2001-06-12): +# the timezone for Argentina will not change next Sunday. +# Apparently it will do so on Sunday 24th.... +# http://ar.clarin.com/diario/2001-06-12/s-03501.htm +# +# (2001-06-25): +# Last Friday (yes, the last working day before the date of the change), the +# Senate annulled the 1999 law that introduced the changes later postponed. +# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm +# It remains the vote of the Deputies..., but it will be the same.... +# This kind of things had always been done this way in Argentina. +# We are still -03:00 all year round in all of the country. +# +# From Mariano Absatz (2004-05-21): +# Today it was officially published that the Province of Mendoza is changing +# its timezone this winter... starting tomorrow night.... +# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf +# From Paul Eggert (2004-05-24): +# It's Law No. 7,210. This change is due to a public power emergency, so for +# now we'll assume it's for this year only. +# +# From Paul Eggert (2002-01-22): +# +# Hora de verano para la Republica Argentina (2000-10-01) +# says that standard time in Argentina from 1894-10-31 +# to 1920-05-01 was -4:16:48.25. Go with this more-precise value +# over Shanks. +# +# From Mariano Absatz (2004-06-05): +# These media articles from a major newspaper mostly cover the current state: +# http://www.lanacion.com.ar/04/05/27/de_604825.asp +# http://www.lanacion.com.ar/04/05/28/de_605203.asp +# +# The following eight (8) provinces pulled clocks back to UTC-04:00 at +# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). +# Apparently, all nine provinces would go back to UTC-03:00 at the same +# time in October 17th. +# +# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, +# Tierra del Fuego, Tucuman. +# +# From Mariano Absatz (2004-06-14): +# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00 +# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's +# annoyance with the change is much higher than the power savings obtained.... +# +# From Gwillim Law (2004-06-14): +# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... +# "The time change in Tierra del Fuego was a conflicted decision from +# the start. The government had decreed that the measure would take +# effect on June 1, but a normative error forced the new time to begin +# three days earlier, from a Saturday to a Sunday.... +# Our understanding was that the change was originally scheduled to take place +# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other +# provinces). Sunday was May 30, only two days earlier. So the article +# contains a contradiction. I would give more credence to the Saturday/Sunday +# date than the "three days earlier" phrase, and conclude that Tierra del +# Fuego set its clocks back at 2004-05-30 00:00. +# +# From Steffen Thorsen (2004-10-05): +# The previous law 7210 which changed the province of Mendoza's time zone +# back in May have been modified slightly in a new law 7277, which set the +# new end date to 2004-09-26 (original date was 2004-10-17). +# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf +# +# From Mariano Absatz (2004-10-05): +# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between +# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 +# at midnight between Saturday, July 24th and Sunday, July 25th.... +# http://www.sanjuan.gov.ar/prensa/archivo/000329.html +# http://www.sanjuan.gov.ar/prensa/archivo/000426.html +# http://www.sanjuan.gov.ar/prensa/archivo/000441.html + +# Unless otherwise specified, data are from Shanks through 1992, from +# the IATA otherwise. As noted below, Shanks says that +# America/Cordoba split into 6 subregions during 1991/1992, but we +# haven't verified this yet so for now we'll keep it a single region. +# # Zone NAME GMTOFF RULES FORMAT [UNTIL] # -# Buenos Aires (BA), Distrito Federal (DF), Santa Cruz (SC), -# Tierra del Fuego (TF) & Antartida e Islas -Zone America/Buenos_Aires -3:53:48 - LMT 1894 Nov - -4:16:44 - CMT 1920 May # Cordoba Mean Time +# Buenos Aires (BA), Capital Federal (CF), +Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May # Cordoba Mean Time -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 + -3:00 - ART # # Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), -# Formosa (FM), La Pampa (LP), Chubut (CH) -Zone America/Rosario -4:02:40 - LMT 1894 Nov - -4:16:44 - CMT 1920 May +# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB), +# San Luis (SL), La Pampa (LP), Neuquen (NQ), Rio Negro (RN) +# +# Shanks also makes the following claims, which we haven't verified: +# - Formosa switched to -3:00 on 1991-01-07. +# - Misiones switched to -3:00 on 1990-12-29. +# - Chaco switched to -3:00 on 1991-01-04. +# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15, +# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01. +# - Santiago del Estero switched to -4:00 on 1991-04-01, +# then to -3:00 on 1991-04-26. +# +Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Jul + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1991 Mar 3 + -4:00 - WART 1991 Oct 20 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 -3:00 - ART # -# Cordoba (CB), Santiago del Estero (SE), Salta (SA), Tucuman (TM), La Rioja (LR), San Juan (SJ), San Luis (SL), -# Neuquen (NQ), Rio Negro (RN) -Zone America/Cordoba -4:16:44 - LMT 1894 Nov - -4:16:44 - CMT 1920 May +# Tucuman (TM) +Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1990 Jul + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1991 Mar 3 + -4:00 - WART 1991 Oct 20 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 + -3:00 - ART 2004 Jun 1 + -4:00 - WART 2004 Jun 13 + -3:00 - ART +# +# La Rioja (LR) +Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1991 Mar 1 + -4:00 - WART 1991 May 7 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 + -3:00 - ART 2004 Jun 1 + -4:00 - WART 2004 Jun 20 + -3:00 - ART +# +# San Juan (SJ) +Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1991 Mar 1 + -4:00 - WART 1991 May 7 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 + -3:00 - ART 2004 May 31 + -4:00 - WART 2004 Jul 25 -3:00 - ART # # Jujuy (JY) -Zone America/Jujuy -4:21:12 - LMT 1894 Nov - -4:16:44 - CMT 1920 May +Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Mar 3 + -3:00 Arg AR%sT 1990 Mar 4 + -4:00 - WART 1990 Oct 28 + -4:00 1:00 WARST 1991 Mar 17 -4:00 - WART 1991 Oct 6 - -4:00 1:00 WARST 1992 Mar 15 - -4:00 - WART 1992 Oct 18 + -3:00 1:00 ARST 1992 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 -3:00 - ART # # Catamarca (CT) -Zone America/Catamarca -4:23:08 - LMT 1894 Nov - -4:16:44 - CMT 1920 May +Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1990 Jul - -3:00 - ART 1991 Jul - -3:00 Arg AR%sT 1992 Jul + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1991 Mar 3 + -4:00 - WART 1991 Oct 20 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 + -3:00 - ART 2004 Jun 1 + -4:00 - WART 2004 Jun 20 -3:00 - ART # # Mendoza (MZ) -Zone America/Mendoza -4:35:16 - LMT 1894 Nov - -4:16:44 - CMT 1920 May +Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Mar 3 + -3:00 Arg AR%sT 1990 Mar 4 + -4:00 - WART 1990 Oct 15 + -4:00 1:00 WARST 1991 Mar 1 -4:00 - WART 1991 Oct 15 -4:00 1:00 WARST 1992 Mar 1 -4:00 - WART 1992 Oct 18 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 + -3:00 - ART 2004 May 23 + -4:00 - WART 2004 Sep 26 + -3:00 - ART +# +# Chubut (CH) +# The name "Comodoro Rivadavia" exceeds the 14-byte POSIX limit. +Zone America/Argentina/ComodRivadavia -4:30:00 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1991 Mar 3 + -4:00 - WART 1991 Oct 20 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 + -3:00 - ART 2004 Jun 1 + -4:00 - WART 2004 Jun 20 + -3:00 - ART +# +# Santa Cruz (SC) +Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May # Cordoba Mean Time + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 + -3:00 - ART 2004 Jun 1 + -4:00 - WART 2004 Jun 20 + -3:00 - ART +# +# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) +Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 + -4:16:48 - CMT 1920 May # Cordoba Mean Time + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1999 Oct 3 + -4:00 Arg AR%sT 2000 Mar 3 + -3:00 - ART 2004 May 30 + -4:00 - WART 2004 Jun 20 -3:00 - ART # Aruba @@ -180,20 +368,12 @@ Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad # Bolivia # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/La_Paz -4:32:36 - LMT 1890 - -4:32:36 - LPMT 1931 Oct 15 # La Paz Mean Time + -4:32:36 - CMT 1931 Oct 15 # Calamarca MT -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST -4:00 - BOT # Bolivia Time # Brazil -# From Guy Harris: -# The OAG lists 1987-10-25 and 1988-02-12 as the starting and -# ending dates, giving them as "estimated date(s) based on previous year". We -# infer a rule here from one example, always a dangerous practice.... Yes, -# they really do switch on Saturday, according to the OAG. -# "[America/Porto_Acre]" is for the Territory of Acre; -# "[America/Noronha]" is for Fernando De Noronha. - # From Paul Eggert (1993-11-18): # The mayor of Rio recently attempted to change the time zone rules # just in his city, in order to leave more summer time for the tourist trade. @@ -227,98 +407,307 @@ Zone America/La_Paz -4:32:36 - LMT 1890 # Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do # Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. -# From Paul Eggert (1996-11-22): -# Let's make the following assumptions: -# -# * All data in Shanks are correct through 1990. In particular, -# Shanks was right when he said Acre stopped observing DST in mid-1988. -# * Areas where Shanks reports DST up to 1990, but the IATA reports no DST -# in 1995, stopped observing DST in mid-1990. +# From Marcos Tadeu (1998-09-27): +# +# Brazilian official page +# + +# From Jesper Norgaard (2000-11-03): +# [For an official list of which regions in Brazil use which time zones, see:] +# http://pcdsh01.on.br/Fusbr.htm +# http://pcdsh01.on.br/Fusbrhv.htm + +# From Celso Doria via David Madeo (2002-10-09): +# The reason for the delay this year has to do with elections in Brazil. # -# Under these assumptions Brazil needs 7 entries to cover all the distinct -# time zone histories since 1970: +# Unlike in the United States, elections in Brazil are 100% computerized and +# the results are known almost immediately. Yesterday, it was the first +# round of the elections when 115 million Brazilians voted for President, +# Governor, Senators, Federal Deputies, and State Deputies. Nobody is +# counting (or re-counting) votes anymore and we know there will be a second +# round for the Presidency and also for some Governors. The 2nd round will +# take place on October 27th. # -# Noronha (UTC-2), Fortaleza (UTC-3), and Manaus (UTC-4) stopped observing DST -# in mid-1990. -# Maceio (UTC-3) stopped observing DST in mid-1990, but started again mid-1995. -# Sao Paulo (UTC-3) and Cuiaba (UTC-4) always observed DST. -# Porto Acre (UTC-5) stopped observing DST in mid-1988. +# The reason why the DST will only begin November 3rd is that the thousands +# of electoral machines used cannot have their time changed, and since the +# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, +# the Government decided to postpone DST, instead of changing the Constitution +# (maybe, for the next elections, it will be possible to change the clock)... + +# From Rodrigo Severo (2004-10-04): +# It's just the biannual change made necessary by the much hyped, supposedly +# modern Brazilian eletronic voting machines which, apparently, can't deal +# with a time change between the first and the second rounds of the elections. + +# From Paul Eggert (2002-10-10): +# The official decrees referenced below are mostly taken from +# +# Decretos sobre o Horario de Verao no Brasil +# (2001-09-20, in Portuguese). +# The official site for all decrees, including those not related to time, is +# +# Presidencia da Republica, Subchefia para Assuntos Juridicos, Decretos +# (in Portuguese). # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Brazil 1931 only - Oct 3 11:00 1:00 D -Rule Brazil 1932 1933 - Apr 1 0:00 0 S -Rule Brazil 1932 only - Oct 3 0:00 1:00 D -Rule Brazil 1949 1952 - Dec 1 0:00 1:00 D -Rule Brazil 1950 only - Apr 16 0:00 0 S -Rule Brazil 1951 1953 - Apr 1 0:00 0 S -Rule Brazil 1963 only - Dec 9 0:00 1:00 D -Rule Brazil 1964 only - Mar 1 0:00 0 S -Rule Brazil 1965 only - Jan 31 0:00 1:00 D -Rule Brazil 1965 only - Apr 1 0:00 0 S -Rule Brazil 1965 only - Dec 1 0:00 1:00 D -Rule Brazil 1966 1968 - Mar 1 0:00 0 S -Rule Brazil 1966 1967 - Nov 1 0:00 1:00 D -Rule Brazil 1985 only - Nov 2 0:00 1:00 D -Rule Brazil 1986 only - Mar 15 0:00 0 S -Rule Brazil 1986 1987 - Oct Sat<=28 0:00 1:00 D -Rule Brazil 1987 only - Feb 14 0:00 0 S -Rule Brazil 1988 only - Feb 7 0:00 0 S -Rule Brazil 1989 only - Jan 22 0:00 0 S -Rule Brazil 1988 1989 - Oct Sun>=10 0:00 1:00 D -Rule Brazil 1990 1991 - Feb Sun>=11 0:00 0 S -Rule Brazil 1990 1992 - Oct Sun>=20 0:00 1:00 D -Rule Brazil 1992 only - Feb 9 0:00 0 S -Rule Brazil 1993 max - Oct Sun>=11 0:00 1:00 D -Rule Brazil 1993 only - Jan 31 0:00 0 S -Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 S -Rule Brazil 1996 max - Feb Sun>=11 0:00 0 S +# Decree 20,466 (1931-10-01) +# Decree 21,896 (1932-01-10) +Rule Brazil 1931 only - Oct 3 11:00 1:00 S +Rule Brazil 1932 1933 - Apr 1 0:00 0 - +Rule Brazil 1932 only - Oct 3 0:00 1:00 S +# Decree 23,195 (1933-10-10) +# revoked DST. +# Decree 27,496 (1949-11-24) +# Decree 27,998 (1950-04-13) +Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S +Rule Brazil 1950 only - Apr 16 1:00 0 - +Rule Brazil 1951 1952 - Apr 1 0:00 0 - +# Decree 32,308 (1953-02-24) +Rule Brazil 1953 only - Mar 1 0:00 0 - +# Decree 34,724 (1953-11-30) +# revoked DST. +# Decree 52,700 (1963-10-18) +# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 +# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. +# Decree 53,071 (1963-12-03) +# extended the above decree to all of the national territory on 12-09. +Rule Brazil 1963 only - Dec 9 0:00 1:00 S +# Decree 53,604 (1964-02-25) +# extended summer time by one day to 1964-03-01 00:00 (start of school). +Rule Brazil 1964 only - Mar 1 0:00 0 - +# Decree 55,639 (1965-01-27) +Rule Brazil 1965 only - Jan 31 0:00 1:00 S +Rule Brazil 1965 only - Mar 31 0:00 0 - +# Decree 57,303 (1965-11-22) +Rule Brazil 1965 only - Dec 1 0:00 1:00 S +# Decree 57,843 (1966-02-18) +Rule Brazil 1966 1968 - Mar 1 0:00 0 - +Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S +# Decree 63,429 (1968-10-15) +# revoked DST. +# Decree 91,698 (1985-09-27) +Rule Brazil 1985 only - Nov 2 0:00 1:00 S +# Decree 92,310 (1986-01-21) +# Decree 92,463 (1986-03-13) +Rule Brazil 1986 only - Mar 15 0:00 0 - +# Decree 93,316 (1986-10-01) +Rule Brazil 1986 only - Oct 25 0:00 1:00 S +Rule Brazil 1987 only - Feb 14 0:00 0 - +# Decree 94,922 (1987-09-22) +Rule Brazil 1987 only - Oct 25 0:00 1:00 S +Rule Brazil 1988 only - Feb 7 0:00 0 - +# Decree 96,676 (1988-09-12) +# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) +Rule Brazil 1988 only - Oct 16 0:00 1:00 S +Rule Brazil 1989 only - Jan 29 0:00 0 - +# Decree 98,077 (1989-08-21) +# with the same exceptions +Rule Brazil 1989 only - Oct 15 0:00 1:00 S +Rule Brazil 1990 only - Feb 11 0:00 0 - +# Decree 99,530 (1990-09-17) +# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. +# Decree 99,629 (1990-10-19) adds BA, MT. +Rule Brazil 1990 only - Oct 21 0:00 1:00 S +Rule Brazil 1991 only - Feb 17 0:00 0 - +# Unnumbered decree (1991-09-25) +# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. +Rule Brazil 1991 only - Oct 20 0:00 1:00 S +Rule Brazil 1992 only - Feb 9 0:00 0 - +# Unnumbered decree (1992-10-16) +# adopted by same states. +Rule Brazil 1992 only - Oct 25 0:00 1:00 S +Rule Brazil 1993 only - Jan 31 0:00 0 - +# Decree 942 (1993-09-28) +# adopted by same states, plus AM. +# Decree 1,252 (1994-09-22; +# web page corrected 2004-01-07) adopted by same states, minus AM. +# Decree 1,636 (1995-09-14) +# adopted by same states, plus MT and TO. +# Decree 1,674 (1995-10-13) +# adds AL, SE. +Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S +Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - +Rule Brazil 1996 only - Feb 11 0:00 0 - +# Decree 2,000 (1996-09-04) +# adopted by same states, minus AL, SE. +Rule Brazil 1996 only - Oct 6 0:00 1:00 S +Rule Brazil 1997 only - Feb 16 0:00 0 - +# From Daniel C. Sobral (1998-02-12): +# In 1997, the DS began on October 6. The stated reason was that +# because international television networks ignored Brazil's policy on DS, +# they bought the wrong times on satellite for coverage of Pope's visit. +# This year, the ending date of DS was postponed to March 1 +# to help dealing with the shortages of electric power. +# +# From Paul Eggert (1998-02-25): +# +# Brazil Prepares for Papal Visit +# , +# Church Net UK (1997-10-02). +# +# Decree 2,317 (1997-09-04), adopted by same states. +Rule Brazil 1997 only - Oct 6 0:00 1:00 S +# Decree 2,495 +# (1998-02-10) +Rule Brazil 1998 only - Mar 1 0:00 0 - +# Decree 2,780 (1998-09-11) +# adopted by the same states as before. +Rule Brazil 1998 only - Oct 11 0:00 1:00 S +Rule Brazil 1999 only - Feb 21 0:00 0 - +# Decree 3,150 +# (1999-08-23) adopted by same states. +# Decree 3,188 (1999-09-30) +# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. +Rule Brazil 1999 only - Oct 3 0:00 1:00 S +Rule Brazil 2000 only - Feb 27 0:00 0 - +# Decree 3,592 (2000-09-06) +# adopted by the same states as before. +# Decree 3,630 (2000-10-13) +# repeals DST in PE and RR, effective 2000-10-15 00:00. +# Decree 3,632 (2000-10-17) +# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. +# Decree 3,916 +# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. +Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S +Rule Brazil 2001 max - Feb Sun>=15 0:00 0 - +# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. +# +Rule Brazil 2002 only - Nov 3 0:00 1:00 S +# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. +# +Rule Brazil 2003 only - Oct 19 0:00 1:00 S +# Decree 5,223 (2004-10-01) reestablishes DST in MT. +# +Rule Brazil 2004 only - Nov 2 0:00 1:00 S +# The latest ruleset listed above says that the following states observe DST: +# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. +# +Rule Brazil 2005 max - Oct Sun>=15 0:00 1:00 S +# For dates after mid-2005, the above rules with TO="max" are guesses +# and are quite possibly wrong, but are more likely than no DST at all. + # Zone NAME GMTOFF RULES FORMAT [UNTIL] # -# Fernando de Noronha +# Fernando de Noronha (administratively part of PE) Zone America/Noronha -2:09:40 - LMT 1914 - -2:00 - FST 1963 Dec 9 - -2:00 Brazil F%sT 1990 Jul - -2:00 - FST + -2:00 Brazil FN%sT 1990 Sep 17 + -2:00 - FNT 1999 Sep 30 + -2:00 Brazil FN%sT 2000 Oct 15 + -2:00 - FNT 2001 Sep 13 + -2:00 Brazil FN%sT 2002 Oct 1 + -2:00 - FNT +# Other Atlantic islands have no permanent settlement. +# These include Trindade and Martin Vaz (administratively part of ES), +# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE). +# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; +# it also included the Penedos. # -# Amapa, east Para, Maranhao, Piaui, Ceara, Rio Grande do Norte, Paraiba, -# Pernambuco (except Fernando de Noronha) +# Amapa (AP), east Para (PA) +# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. +# The division between east and west Para is the river Xingu. +# In the north a very small part from the river Javary (now Jari I guess, +# the border with Amapa) to the Amazon, then to the Xingu. +Zone America/Belem -3:13:56 - LMT 1914 + -3:00 Brazil BR%sT 1988 Sep 12 + -3:00 - BRT +# +# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), +# Paraiba (PB) Zone America/Fortaleza -2:34:00 - LMT 1914 - -3:00 - EST 1963 Dec 9 - -3:00 Brazil E%sT 1990 Jul - -3:00 - EST + -3:00 Brazil BR%sT 1990 Sep 17 + -3:00 - BRT 1999 Sep 30 + -3:00 Brazil BR%sT 2000 Oct 22 + -3:00 - BRT 2001 Sep 13 + -3:00 Brazil BR%sT 2002 Oct 1 + -3:00 - BRT +# +# Pernambuco (PE) (except Atlantic islands) +Zone America/Recife -2:19:36 - LMT 1914 + -3:00 Brazil BR%sT 1990 Sep 17 + -3:00 - BRT 1999 Sep 30 + -3:00 Brazil BR%sT 2000 Oct 15 + -3:00 - BRT 2001 Sep 13 + -3:00 Brazil BR%sT 2002 Oct 1 + -3:00 - BRT # -# Alagoas, Sergipe, Tocantins +# Tocantins (TO) +Zone America/Araguaina -3:12:48 - LMT 1914 + -3:00 Brazil BR%sT 1990 Sep 17 + -3:00 - BRT 1995 Sep 14 + -3:00 Brazil BR%sT 2003 Sep 24 + -3:00 - BRT +# +# Alagoas (AL), Sergipe (SE) Zone America/Maceio -2:22:52 - LMT 1914 - -3:00 - EST 1963 Dec 9 - -3:00 Brazil E%sT 1990 Jul - -3:00 - EST 1995 Jul - -3:00 Brazil E%sT + -3:00 Brazil BR%sT 1990 Sep 17 + -3:00 - BRT 1995 Oct 13 + -3:00 Brazil BR%sT 1996 Sep 4 + -3:00 - BRT 1999 Sep 30 + -3:00 Brazil BR%sT 2000 Oct 22 + -3:00 - BRT 2001 Sep 13 + -3:00 Brazil BR%sT 2002 Oct 1 + -3:00 - BRT +# +# Bahia (BA) +# There are too many Salvadors elsewhere, so use America/Bahia instead +# of America/Salvador. +Zone America/Bahia -2:34:04 - LMT 1914 + -3:00 Brazil BR%sT 2003 Sep 24 + -3:00 - BRT # -# Bahia, Goias, Distrito Federal, Minas Gerais, Espirito Santo, Rio de Janeiro, -# Sao Paulo, Parana, Santa Catarina, Rio Grande do Sul +# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), +# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), +# Santa Catarina (SC), Rio Grande do Sul (RS) Zone America/Sao_Paulo -3:06:28 - LMT 1914 - -3:00 Brazil E%sT + -3:00 Brazil BR%sT 1963 Oct 23 00:00 + -3:00 1:00 BRST 1964 + -3:00 Brazil BR%sT +# +# Mato Grosso do Sul (MS) +Zone America/Campo_Grande -3:38:28 - LMT 1914 + -4:00 Brazil AM%sT # -# Mato Grosso, Mato Grosso do Sul +# Mato Grosso (MT) Zone America/Cuiaba -3:44:20 - LMT 1914 - -4:00 - WST 1963 Dec 9 - -4:00 Brazil W%sT + -4:00 Brazil AM%sT 2003 Sep 24 + -4:00 - AMT 2004 Oct 4 + -4:00 Brazil AM%sT # -# Roraima, west Para, Amazonas, Rondonia +# west Para (PA), Rondonia (RO) +# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. +Zone America/Porto_Velho -4:15:36 - LMT 1914 + -4:00 Brazil AM%sT 1988 Sep 12 + -4:00 - AMT +# +# Roraima (RR) +Zone America/Boa_Vista -4:02:40 - LMT 1914 + -4:00 Brazil AM%sT 1988 Sep 12 + -4:00 - AMT 1999 Sep 30 + -4:00 Brazil AM%sT 2000 Oct 15 + -4:00 - AMT +# +# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto +# The great circle line from Tabatinga to Porto Acre divides +# east from west Amazonas. Zone America/Manaus -4:00:04 - LMT 1914 - -4:00 - WST 1963 Dec 9 - -4:00 Brazil W%sT 1990 Jul - -4:00 - WST + -4:00 Brazil AM%sT 1988 Sep 12 + -4:00 - AMT 1993 Sep 28 + -4:00 Brazil AM%sT 1994 Sep 22 + -4:00 - AMT # -# Acre -# Rio_Branco is too ambiguous, since there's a Rio Branco in Uruguay too. -Zone America/Porto_Acre -4:31:12 - LMT 1914 - -5:00 - AST 1963 Dec 9 - -5:00 Brazil A%sT 1988 Jul - -5:00 - AST +# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, +# Eirunepe, Envira, Ipixuna +Zone America/Eirunepe -4:39:28 - LMT 1914 + -5:00 Brazil AC%sT 1988 Sep 12 + -5:00 - ACT 1993 Sep 28 + -5:00 Brazil AC%sT 1994 Sep 22 + -5:00 - ACT # -# Martin Vaz and Trinidade are like America/Noronha. +# Acre (AC) +Zone America/Rio_Branco -4:31:12 - LMT 1914 + -5:00 Brazil AC%sT 1988 Sep 12 + -5:00 - ACT # Chile @@ -326,16 +715,54 @@ Zone America/Porto_Acre -4:31:12 - LMT 1914 # From Eduardo Krell (1995-10-19): # The law says to switch to DST at midnight [24:00] on the second SATURDAY # of October.... The law is the same for March and October. +# (1998-09-29): +# Because of the drought this year, the government decided to go into +# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... +# (unless there's another dry season next year, I guess). + +# From Julio I. Pacheco Troncoso (1999-03-18): +# Because of the same drought, the government decided to end DST later, +# on April 3, (one-time change). + +# From Gwillim Law (2001-05-04): +# I came across another article in "La Tercera" about Chilean DST. +# +# It clearly confirms my earlier suggestion, that DST begins at 22:00 +# on Easter Island.... But it also seems to be saying that the +# observance of DST in Chile began in 1966, rather than 1969 as +# ... [Shanks] has it.... +# +# My translation: +# +# "The Chilean Army has announced that summer time will begin tomorrow, +# Saturday, October 14 in continental Chile, insular Chile, and +# Antarctica, as provided by Supreme Decree 25 of January 11, 1966. +# By the preceding, official time in continental Chile and Chilean +# Antarctic, and official time in Western Insular Chile, which applies +# to Easter Island and Sala y Gomez Island, will be set forward at +# midnight and at 22:00, respectively, by 20 minutes." + +# From Paul Eggert (2001-05-04): +# Go with this article in preference to Shanks's 1969 date for modern DST. +# Assume this rule has been used since DST was introduced in the islands. + +# From Paul Eggert (2002-10-24): +# gives many details that +# disagree with the following table, but we haven't had time to compare them. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Chile 1918 only - Sep 1 0:00 1:00 S -Rule Chile 1919 only - Jul 2 0:00 0 - -Rule Chile 1927 1931 - Sep 1 0:00 1:00 S -Rule Chile 1928 1932 - Apr 1 0:00 0 - -Rule Chile 1969 max - Oct Sun>=9 0:00 1:00 S -Rule Chile 1970 max - Mar Sun>=9 0:00 0 - +Rule Chile 1918 only - Sep 1 0:00 1:00 S +Rule Chile 1919 only - Jul 2 0:00 0 - +Rule Chile 1927 1931 - Sep 1 0:00 1:00 S +Rule Chile 1928 1932 - Apr 1 0:00 0 - +Rule Chile 1966 1997 - Oct Sun>=9 4:00u 1:00 S +Rule Chile 1967 1998 - Mar Sun>=9 3:00u 0 - +Rule Chile 1998 only - Sep 27 4:00u 1:00 S +Rule Chile 1999 only - Apr 4 3:00u 0 - +Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S +Rule Chile 2000 max - Mar Sun>=9 3:00u 0 - # IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; -# (1996-09) says 1998-03-08. Ignore these for now. +# (1996-09) says 1998-03-08. Ignore these. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Santiago -4:42:40 - LMT 1890 -4:42:40 - SMT 1910 # Santiago Mean Time @@ -346,12 +773,13 @@ Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time -6:00 Chile EAS%sT # -# Whitman says Juan Fernandez Is are like America/Santiago. -# San Ambrosio, San Felix -# no information; probably like America/Santiago - +# Sala y Gomez Island is like Pacific/Easter. +# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, +# San Felix, and Antarctic bases, are like America/Santiago. # Colombia +# Shanks specifies 24:00 for 1992 transition times; go with IATA, +# as it seems implausible to change clocks at midnight New Year's Eve. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule CO 1992 only - May 2 0:00 1:00 S Rule CO 1992 only - Dec 31 0:00 0 - @@ -363,6 +791,10 @@ Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 # no information; probably like America/Bogota # Curacao +# Shanks says that Bottom and Oranjestad have been at -4:00 since +# standard time was introduced on 1912-03-02; and that Kralendijk and Rincon +# used Kralendijk Mean Time (-4:33:08) from 1912-02-02 to 1965-01-01. +# This all predates our 1970 cutoff, though. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad -4:30 - ANT 1965 # Netherlands Antilles Time @@ -378,6 +810,56 @@ Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno -6:00 - GALT # Galapagos Time # Falklands + +# From Paul Eggert (2001-03-05): +# Between 1990 and 2000 inclusive, Shanks and the IATA agree except +# the IATA gives 1996-09-08. Go with Shanks. + +# From Falkland Islands Government Office, London (2001-01-22) +# via Jesper Norgaard: +# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 +# April 2001 and advance one hour to summer time at 2 am on Sunday 2 +# September. It is anticipated that the clocks will revert back at 2 +# am on Sunday 21 April 2002 and advance to summer time at 2 am on +# Sunday 1 September. + +# From Rives McDow (2001-02-13): +# +# I have communicated several times with people there, and the last +# time I had communications that was helpful was in 1998. Here is +# what was said then: +# +# "The general rule was that Stanley used daylight saving and the Camp +# did not. However for various reasons many people in the Camp have +# started to use daylight saving (known locally as 'Stanley Time') +# There is no rule as to who uses daylight saving - it is a matter of +# personal choice and so it is impossible to draw a map showing who +# uses it and who does not. Any list would be out of date as soon as +# it was produced. This year daylight saving ended on April 18/19th +# and started again on September 12/13th. I do not know what the rule +# is, but can find out if you like. We do not change at the same time +# as UK or Chile." +# +# I did have in my notes that the rule was "Second Saturday in Sep at +# 0:00 until third Saturday in Apr at 0:00". I think that this does +# not agree in some cases with Shanks; is this true? +# +# Also, there is no mention in the list that some areas in the +# Falklands do not use DST. I have found in my communications there +# that these areas are on the western half of East Falkland and all of +# West Falkland. Stanley is the only place that consistently observes +# DST. Again, as in other places in the world, the farmers don't like +# it. West Falkland is almost entirely sheep farmers. +# +# I know one lady there that keeps a list of which farm keeps DST and +# which doesn't each year. She runs a shop in Stanley, and says that +# the list changes each year. She uses it to communicate to her +# customers, catching them when they are home for lunch or dinner. + +# From Paul Eggert (2001-03-05): +# For now, we'll just record the time in Stanley, since we have no +# better info. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - @@ -387,9 +869,10 @@ Rule Falk 1943 only - Jan 1 0:00 0 - Rule Falk 1983 only - Sep lastSun 0:00 1:00 S Rule Falk 1984 1985 - Apr lastSun 0:00 0 - Rule Falk 1984 only - Sep 16 0:00 1:00 S -Rule Falk 1985 1995 - Sep Sun>=9 0:00 1:00 S -Rule Falk 1986 max - Apr Sun>=16 0:00 0 - -Rule Falk 1996 max - Sep Sun>=8 0:00 1:00 S +Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S +Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - +Rule Falk 2001 max - Apr Sun>=15 2:00 0 - +Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/Stanley -3:51:24 - LMT 1890 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time @@ -413,31 +896,56 @@ Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown -4:00 - GYT # Paraguay - -# From Bob Devine (1988-01-28): -# Paraguay: First day in October to last in March. Midnight switch?? -# Since 1980. - -# From U. S. Naval Observatory (1989-01-19): -# PARAGUAY 4 H BEHIND UTC -# PARAGUAY 3 H BEHIND UTC OCT 1, '88-MAR 31, '89 - -# From Shanks (1991): +# From Paul Eggert (1999-10-29): +# Shanks (1999) says that spring transitions are from 01:00 -> 02:00, +# and autumn transitions are from 00:00 -> 23:00. Go with earlier +# editions of Shanks, and with the IATA, who say transitions occur at 00:00. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Para 1975 1978 - Oct 1 0:00 1:00 S +Rule Para 1975 1988 - Oct 1 0:00 1:00 S Rule Para 1975 1978 - Mar 1 0:00 0 - -# Shanks says 1979 was all DST. -Rule Para 1980 1991 - Apr 1 0:00 0 - -Rule Para 1980 1988 - Oct 1 0:00 1:00 S +Rule Para 1979 1991 - Apr 1 0:00 0 - Rule Para 1989 only - Oct 22 0:00 1:00 S Rule Para 1990 only - Oct 1 0:00 1:00 S Rule Para 1991 only - Oct 6 0:00 1:00 S Rule Para 1992 only - Mar 1 0:00 0 - Rule Para 1992 only - Oct 5 0:00 1:00 S Rule Para 1993 only - Mar 31 0:00 0 - -Rule Para 1993 max - Oct 1 0:00 1:00 S +Rule Para 1993 1995 - Oct 1 0:00 1:00 S Rule Para 1994 1995 - Feb lastSun 0:00 0 - -Rule Para 1996 max - Mar 1 0:00 0 - +Rule Para 1996 only - Mar 1 0:00 0 - +# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. +# From Steffen Thorsen (2000-10-02): +# I have three independent reports that Paraguay changed to DST this Sunday +# (10-01). +# +# Translated by Gwillim Law (2001-02-27) from +# +# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) +# : +# Starting at 0:00 today, the clock will be set forward 60 minutes, in +# fulfillment of Decree No. 7,273 of the Executive Power.... The time change +# system has been operating for several years. Formerly there was a separate +# decree each year; the new law has the same effect, but permanently. Every +# year, the time will change on the first Sunday of October; likewise, the +# clock will be set back on the first Sunday of March. +# +# From Jesper Norgaard (2001-03-06) [an official URL saying similar things]: +# http://gateway.abc.com.py:8000/pub/pag04.mbr/artic?FHA=2001-03-03-02.24.52.900592 +# +Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S +# IATA SSIM (1997-09) says Mar 1; go with Shanks. +Rule Para 1997 only - Feb lastSun 0:00 0 - +# Shanks says 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but +# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). +Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - +# From Rives McDow (2002-02-28): +# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the +# dst method to be from the first Sunday in September to the first Sunday in +# April. +Rule Para 2002 max - Apr Sun>=1 0:00 0 - +Rule Para 2002 max - Sep Sun>=1 0:00 1:00 S + + # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Asuncion -3:50:40 - LMT 1890 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time @@ -446,20 +954,30 @@ Zone America/Asuncion -3:50:40 - LMT 1890 -4:00 Para PY%sT # Peru +# +# +# From Evelyn C. Leeper via Mark Brader (2003-10-26): +# When we were in Peru in 1985-1986, they apparently switched over +# sometime between December 29 and January 3 while we were on the Amazon. +# +# From Paul Eggert (2003-11-02): +# Shanks doesn't have this transition. Assume 1986 was like 1987. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Peru 1938 only - Jan 1 0:00 1:00 S Rule Peru 1938 only - Apr 1 0:00 0 - Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - -Rule Peru 1987 only - Jan 1 0:00 1:00 S -Rule Peru 1987 only - Apr 1 0:00 0 - +Rule Peru 1986 1987 - Jan 1 0:00 1:00 S +Rule Peru 1986 1987 - Apr 1 0:00 0 - Rule Peru 1990 only - Jan 1 0:00 1:00 S Rule Peru 1990 only - Apr 1 0:00 0 - -Rule Peru 1993 only - Jan 1 0:00 1:00 S -Rule Peru 1993 only - Apr 1 0:00 0 - +# IATA is ambiguous for 1993/1995; go with Shanks. +Rule Peru 1994 only - Jan 1 0:00 1:00 S +Rule Peru 1994 only - Apr 1 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Lima -5:08:12 - LMT 1890 - -5:09 - LMT 1908 Jul 28 # Lima Mean Time + -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? -5:00 Peru PE%sT # Peru Time # South Georgia @@ -468,7 +986,7 @@ Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken -2:00 - GST # South Georgia Time # South Sandwich Is -# uninhabited +# uninhabited; scientific personnel have wintered # Suriname # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -487,7 +1005,7 @@ Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 # Uruguay # From Paul Eggert (1993-11-18): # Uruguay wins the prize for the strangest peacetime manipulation of the rules. -# From Shanks (1991): +# From Shanks: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S # Whitman gives 1923 Oct 1; go with Shanks. Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS @@ -529,10 +1047,17 @@ Rule Uruguay 1988 only - Mar 14 0:00 0 - Rule Uruguay 1988 only - Dec 11 0:00 1:00 S Rule Uruguay 1989 only - Mar 12 0:00 0 - Rule Uruguay 1989 only - Oct 29 0:00 1:00 S +# Shanks says no DST was observed in 1990/1 and 1991/2, +# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S -Rule Uruguay 1992 1993 - Oct Sun>=15 0:00 1:00 S +Rule Uruguay 1992 only - Oct 18 0:00 1:00 S Rule Uruguay 1993 only - Feb 28 0:00 0 - +# From Eduardo Cota (2004-09-20): +# The uruguayan government has decreed a change in the local time.... +# http://www.presidencia.gub.uy/decretos/2004091502.htm +Rule Uruguay 2004 only - Sep Sun>=15 0:00 1:00 S +Rule Uruguay 2005 only - Mar Sun>=8 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 -3:44:44 - MMT 1920 May 1 # Montevideo MT @@ -542,6 +1067,6 @@ Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 # Venezuela # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Caracas -4:27:44 - LMT 1890 - -4:27:44 - CMT 1912 Feb 12 # Caracas Mean Time + -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? -4:30 - VET 1965 # Venezuela Time -4:00 - VET