2440ca2003-03-30Mirar (Pontus Hagland) # @(#)southamerica 7.46
c0dbee2000-08-01Mirar (Pontus Hagland)  # 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 <eggert@twinsun.com> (1999-07-07): # A good source for time zone historical data outside the U.S. is # Thomas G. Shanks, The International Atlas (5th edition), # San Diego: ACS Publications, Inc. (1999). #
2440ca2003-03-30Mirar (Pontus Hagland) # Gwillim Law writes that a good source
c0dbee2000-08-01Mirar (Pontus Hagland) # 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 # of the IATA's data after 1990. # # Except where otherwise noted, Shanks is the source for entries through 1990, # and IATA SSIM is the source for entries after 1990. # # 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). # I suggest the use of _Summer time_ instead of the more cumbersome # _daylight-saving time_. _Summer time_ seems to be in general use # 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 # # 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 ############################################################################### ############################################################################### # Argentina # From Bob Devine (1988-01-28): # Argentina: first Sunday in October to first Sunday in April since 1976. # Double Summer time from 1969 to 1974. Switches at midnight. # From U. S. Naval Observatory (1988-01-199): # ARGENTINA 3 H BEHIND UTC # From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): # I am sending modifications to the Argentine time zone table... # AR was chosen because they are the ISO letters that represent Argentina. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Arg 1930 only - Dec 1 0:00 1:00 S Rule Arg 1931 only - Apr 1 0:00 0 - Rule Arg 1931 only - Oct 15 0:00 1:00 S Rule Arg 1932 1940 - Mar 1 0:00 0 - Rule Arg 1932 1939 - Nov 1 0:00 1:00 S Rule Arg 1940 only - Jul 1 0:00 1:00 S Rule Arg 1941 only - Jun 15 0:00 0 - Rule Arg 1941 only - Oct 15 0:00 1:00 S Rule Arg 1943 only - Aug 1 0:00 0 - Rule Arg 1943 only - Oct 15 0:00 1:00 S Rule Arg 1946 only - Mar 1 0:00 0 - Rule Arg 1946 only - Oct 1 0:00 1:00 S 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
2440ca2003-03-30Mirar (Pontus Hagland) Rule Arg 1967 only - Apr 2 0:00 0 -
c0dbee2000-08-01Mirar (Pontus Hagland) 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 1988 only - Dec 1 0:00 1:00 S # # From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): # These corrections were contributed by InterSoft Argentina S.A., # obtaining the data from the: # Talleres de Hidrografia Naval Argentina # (Argentine Naval Hydrography Institute) # # 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 # # From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): # From this moment on, the law that mandated the daylight saving # 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
de860a2000-08-12Mirar (Pontus Hagland) # 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 -
c0dbee2000-08-01Mirar (Pontus Hagland) # # From Peter Gradelski via Steffen Thorsen (2000-03-01):
059cb82000-11-15Mirar (Pontus Hagland) # We just checked with our Sao Paulo office and they say the government of
c0dbee2000-08-01Mirar (Pontus Hagland) # 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. #
de860a2000-08-12Mirar (Pontus Hagland) # From Fabian L. Arce Jofre <farcejofre@bigfoot.com> (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. #
2440ca2003-03-30Mirar (Pontus Hagland) # 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 Paul Eggert (2002-01-22): # <a href="http://www.spicasc.net/horvera.html"> # Hora de verano para la Republica Argentina (2000-10-01) # </a> 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. # Unless otherwise specified, data are from Shanks through 1992, from # the IATA otherwise. As noted below, Shanks says that # America/Cordoba split into 7 subregions during 1991/1992, but we # haven't verified this yet so for now we'll keep it a single region. #
c0dbee2000-08-01Mirar (Pontus Hagland) # Zone NAME GMTOFF RULES FORMAT [UNTIL] #
de860a2000-08-12Mirar (Pontus Hagland) # Buenos Aires (BA), Capital Federal (CF), Santa Cruz (SC), # Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
2440ca2003-03-30Mirar (Pontus Hagland) Zone America/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May # Cordoba Mean Time
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5
2440ca2003-03-30Mirar (Pontus Hagland)  -3:00 Arg AR%sT 1999 Oct 3 -4:00 Arg AR%sT 2000 Mar 3
de860a2000-08-12Mirar (Pontus Hagland)  -3:00 - ART
c0dbee2000-08-01Mirar (Pontus Hagland) # # Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
2440ca2003-03-30Mirar (Pontus Hagland) # Formosa (FM), Salta (SA), Tucuman (TM), Santiago del Estero (SE), # Cordoba (CB), La Rioja (LR), San Juan (SJ), San Luis (SL), La Pampa (LP), # Neuquen (NQ), Rio Negro (RN), Chubut (CH) # # Shanks also makes the following claims, which we haven't verified: # - Formosa switched to -3:00 on 1991-01-07. # - La Rioja and San Juan switched to -4:00 on 1991-03-01 # and then to -3:00 on 1991-05-07. # - 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. # If we need to add Zones for these areas, we may need to have a subdirectory # for Argentina, as e.g. "America/San_Luis" is too ambiguious. # Zone America/Cordoba -4:16:48 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5
2440ca2003-03-30Mirar (Pontus Hagland)  -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
c0dbee2000-08-01Mirar (Pontus Hagland)  -3:00 - ART # # Jujuy (JY)
2440ca2003-03-30Mirar (Pontus Hagland) Zone America/Jujuy -4:21:12 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5
2440ca2003-03-30Mirar (Pontus Hagland)  -3:00 Arg AR%sT 1990 Mar 4 -4:00 - WART 1990 Oct 28 -4:00 1:00 WARST 1991 Mar 17
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:00 - WART 1991 Oct 6
2440ca2003-03-30Mirar (Pontus Hagland)  -3:00 1:00 ARST 1992 -3:00 Arg AR%sT 1999 Oct 3 -4:00 Arg AR%sT 2000 Mar 3
c0dbee2000-08-01Mirar (Pontus Hagland)  -3:00 - ART # # Catamarca (CT)
2440ca2003-03-30Mirar (Pontus Hagland) Zone America/Catamarca -4:23:08 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5
2440ca2003-03-30Mirar (Pontus Hagland)  -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
c0dbee2000-08-01Mirar (Pontus Hagland)  -3:00 - ART # # Mendoza (MZ)
2440ca2003-03-30Mirar (Pontus Hagland) Zone America/Mendoza -4:35:16 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5
2440ca2003-03-30Mirar (Pontus Hagland)  -3:00 Arg AR%sT 1990 Mar 4 -4:00 - WART 1990 Oct 15 -4:00 1:00 WARST 1991 Mar 1
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:00 - WART 1991 Oct 15 -4:00 1:00 WARST 1992 Mar 1 -4:00 - WART 1992 Oct 18
2440ca2003-03-30Mirar (Pontus Hagland)  -3:00 Arg AR%sT 1999 Oct 3 -4:00 Arg AR%sT 2000 Mar 3
c0dbee2000-08-01Mirar (Pontus Hagland)  -3:00 - ART # Aruba # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad -4:30 - ANT 1965 # Netherlands Antilles Time -4:00 - AST # Bolivia # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/La_Paz -4:32:36 - LMT 1890
2440ca2003-03-30Mirar (Pontus Hagland)  -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST -4:00 - BOT # Bolivia Time # Brazil # From Paul Eggert <eggert@twinsun.com> (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. # The rule change lasted only part of the day; # the federal government refused to follow the city's rules, and business # was in a chaos, so the mayor backed down that afternoon. # From IATA SSIM (1996-02): # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), # Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), # Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. # [The last three states are new to this issue of the IATA SSIM.] # From Gwillim Law (1996-10-07): # Geography, history (Tocantins was part of Goias until 1989), and other # sources of time zone information lead me to believe that AL, SE, and TO were # always in BR1, and so the only change was whether or not they observed DST.... # The earliest issue of the SSIM I have is 2/91. Each issue from then until # 9/95 says that DST is observed only in the ten states I quoted from 9/95, # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 # (UTC-4).... The other two time zones given for Brazil are BR3, which is # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's # become part of the state of Pernambuco). The boundary between BR1 and BR2 # has never been clearly stated. They've simply been called East and West. # However, some conclusions can be drawn from another IATA manual: the Airline # Coding Directory, which lists close to 400 airports in Brazil. For each # airport it gives a time zone which is coded to the SSIM. From that # information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), # 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 Marcos Tadeu (1998-09-27): # <a href="http://pcdsh01.on.br/verao1.html"> # Brazilian official page # </a>
01c4092001-01-09Mirar (Pontus Hagland)  # 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
2440ca2003-03-30Mirar (Pontus Hagland) # From Celso Doria via David Madeo (2002-10-09): # The reason for the delay this year has to do with elections in Brazil. # # 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. # # 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 Paul Eggert (2002-10-10): # The official decrees referenced below are mostly taken from
c0dbee2000-08-01Mirar (Pontus Hagland) # <a href="http://pcdsh01.on.br/DecHV.html"> # Decretos sobre o Horario de Verao no Brasil
2440ca2003-03-30Mirar (Pontus Hagland) # </a> (2001-09-20, in Portuguese).
059cb82000-11-15Mirar (Pontus Hagland) # The official site for all decrees, including those not related to time, is # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/principal_ano.htm"> # Presidencia da Republica, Subchefia para Assuntos Juridicos, Decretos # </a> (in Portuguese).
c0dbee2000-08-01Mirar (Pontus Hagland)  # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S # Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) # Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (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 <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) # revoked DST. # Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) # Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (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 <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) Rule Brazil 1953 only - Mar 1 0:00 0 - # Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) # revoked DST. # Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (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 <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (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 <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (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 <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) Rule Brazil 1965 only - Jan 31 0:00 1:00 S Rule Brazil 1965 only - Mar 31 0:00 0 - # Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) Rule Brazil 1965 only - Dec 1 0:00 1:00 S # Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) Rule Brazil 1966 1968 - Mar 1 0:00 0 - Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S # Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) # revoked DST. # Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (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 <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) Rule Brazil 1987 only - Oct 25 0:00 1:00 S Rule Brazil 1988 only - Feb 7 0:00 0 - # Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (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 <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (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 <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (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 - # <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (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 - # <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (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 <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) # adopted by same states, plus AM. # Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22) # adopted by same states, minus AM. # Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) # adopted by same states, plus TO. # Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (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 <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (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 <dcs@gns.com.br> (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): # <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm"> # Brazil Prepares for Papal Visit # </a>, # 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 <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> # (1998-02-10) Rule Brazil 1998 only - Mar 1 0:00 0 - # Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (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 <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> # (1999-08-23) adopted by same states. # Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
059cb82000-11-15Mirar (Pontus Hagland) # 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 <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) # adopted by the same states as before.
01c4092001-01-09Mirar (Pontus Hagland) # Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) # repeals DST in PE and RR, effective 2000-10-15 00:00. # Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
2440ca2003-03-30Mirar (Pontus Hagland) # Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> # (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. # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a> Rule Brazil 2002 only - Nov 3 0:00 1:00 S
01c4092001-01-09Mirar (Pontus Hagland) #
2440ca2003-03-30Mirar (Pontus Hagland) Rule Brazil 2003 max - Oct Sun>=8 0:00 1:00 S # The latest decree listed above says that the following states observe DST: # BA, DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP, TO. # # For dates after mid-2003, the above rules with TO="max" are guesses
c0dbee2000-08-01Mirar (Pontus Hagland) # and are quite possibly wrong, but are more likely than no DST at all. # Zone NAME GMTOFF RULES FORMAT [UNTIL] #
01c4092001-01-09Mirar (Pontus Hagland) # Atlantic islands: Fernando de Noronha, Trindade, Martin Vaz, # Atol das Rocas, and Penedos de Sao Pedro e Sao Paulo
c0dbee2000-08-01Mirar (Pontus Hagland) Zone America/Noronha -2:09:40 - LMT 1914 -2:00 Brazil FN%sT 1990 Sep 17 -2:00 - FNT # # Amapa (AP), east Para (PA)
01c4092001-01-09Mirar (Pontus Hagland) # East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
c0dbee2000-08-01Mirar (Pontus Hagland) 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),
01c4092001-01-09Mirar (Pontus Hagland) # Paraiba (PB)
c0dbee2000-08-01Mirar (Pontus Hagland) Zone America/Fortaleza -2:34:00 - LMT 1914 -3:00 Brazil BR%sT 1990 Sep 17 -3:00 - BRT 1999 Sep 30
01c4092001-01-09Mirar (Pontus Hagland)  -3:00 Brazil BR%sT 2000 Oct 22
2440ca2003-03-30Mirar (Pontus Hagland)  -3:00 - BRT 2001 Sep 13 -3:00 Brazil BR%sT 2002 Oct 1
01c4092001-01-09Mirar (Pontus Hagland)  -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
2440ca2003-03-30Mirar (Pontus Hagland)  -3:00 - BRT 2001 Sep 13 -3:00 Brazil BR%sT 2002 Oct 1
01c4092001-01-09Mirar (Pontus Hagland)  -3:00 - BRT
c0dbee2000-08-01Mirar (Pontus Hagland) # # 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 # # Alagoas (AL), Sergipe (SE) Zone America/Maceio -2:22:52 - LMT 1914 -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
01c4092001-01-09Mirar (Pontus Hagland)  -3:00 Brazil BR%sT 2000 Oct 22
2440ca2003-03-30Mirar (Pontus Hagland)  -3:00 - BRT 2001 Sep 13 -3:00 Brazil BR%sT 2002 Oct 1
01c4092001-01-09Mirar (Pontus Hagland)  -3:00 - BRT
c0dbee2000-08-01Mirar (Pontus Hagland) # # Bahia (BA), 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 BR%sT 1963 Oct 23 00:00 -3:00 1:00 BRST 1964 -3:00 Brazil BR%sT #
2440ca2003-03-30Mirar (Pontus Hagland) # Mato Grosso (MT), Mato Grosso do Sul (MS)
c0dbee2000-08-01Mirar (Pontus Hagland) Zone America/Cuiaba -3:44:20 - LMT 1914 -4:00 Brazil AM%sT # # west Para (PA), Rondonia (RO)
01c4092001-01-09Mirar (Pontus Hagland) # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
c0dbee2000-08-01Mirar (Pontus Hagland) 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
01c4092001-01-09Mirar (Pontus Hagland)  -4:00 Brazil AM%sT 2000 Oct 15 -4:00 - AMT
c0dbee2000-08-01Mirar (Pontus Hagland) #
01c4092001-01-09Mirar (Pontus Hagland) # east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
c0dbee2000-08-01Mirar (Pontus Hagland) Zone America/Manaus -4:00:04 - LMT 1914 -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 #
01c4092001-01-09Mirar (Pontus Hagland) # 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 #
c0dbee2000-08-01Mirar (Pontus Hagland) # Acre (AC)
2440ca2003-03-30Mirar (Pontus Hagland) Zone America/Rio_Branco -4:31:12 - LMT 1914
c0dbee2000-08-01Mirar (Pontus Hagland)  -5:00 Brazil AC%sT 1988 Sep 12 -5:00 - ACT # Chile # 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).
2440ca2003-03-30Mirar (Pontus Hagland) # From Gwillim Law (2001-05-04): # I came across another article in "La Tercera" about Chilean DST. # <http://www.tercera.cl/diario/2000/10/13/t-extras.html> # 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): # <http://www.shoa.cl/shoa/faqhoraoficial.htm> gives many details that # disagree with the following table, but we haven't had time to compare them.
c0dbee2000-08-01Mirar (Pontus Hagland) # 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 -
2440ca2003-03-30Mirar (Pontus Hagland) 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 -
c0dbee2000-08-01Mirar (Pontus Hagland) # IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; # (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 -5:00 Chile CL%sT 1932 Sep # Chile Time -4:00 Chile CL%sT Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri -7:17:28 - MMT 1932 Sep # Mataveri Mean Time -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time -6:00 Chile EAS%sT #
2440ca2003-03-30Mirar (Pontus Hagland) # 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.
c0dbee2000-08-01Mirar (Pontus Hagland)  # 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 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time -5:00 CO CO%sT # Colombia Time # Malpelo, Providencia, San Andres # 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 -4:00 - AST # Ecuador # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Guayaquil -5:19:20 - LMT 1890 -5:14:00 - QMT 1931 # Quito Mean Time -5:00 - ECT # Ecuador Time Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno -5:00 - ECT 1986 -6:00 - GALT # Galapagos Time # Falklands
2440ca2003-03-30Mirar (Pontus Hagland)  # 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.
c0dbee2000-08-01Mirar (Pontus Hagland) # 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 - Rule Falk 1939 only - Oct 1 0:00 1:00 S Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 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
2440ca2003-03-30Mirar (Pontus Hagland) 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
c0dbee2000-08-01Mirar (Pontus Hagland) # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/Stanley -3:51:24 - LMT 1890 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time -4:00 Falk FK%sT 1983 May # Falkland Is Time -3:00 Falk FK%sT 1985 Sep 15 -4:00 Falk FK%sT # French Guiana # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Cayenne -3:29:20 - LMT 1911 Jul -4:00 - GFT 1967 Oct # French Guiana Time -3:00 - GFT # Guyana # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown -3:45 - GBGT 1966 May 26 # Br Guiana Time -3:45 - GYT 1975 Jul 31 # Guyana Time -3:00 - GYT 1991 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. -4:00 - GYT # Paraguay # 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 1988 - Oct 1 0:00 1:00 S Rule Para 1975 1978 - Mar 1 0:00 0 - 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 1995 - Oct 1 0:00 1:00 S Rule Para 1994 1995 - Feb lastSun 0:00 0 - Rule Para 1996 only - Mar 1 0:00 0 -
2440ca2003-03-30Mirar (Pontus Hagland) # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
059cb82000-11-15Mirar (Pontus Hagland) # From Steffen Thorsen (2000-10-02): # I have three independent reports that Paraguay changed to DST this Sunday # (10-01).
2440ca2003-03-30Mirar (Pontus Hagland) # # Translated by Gwillim Law (2001-02-27) from # <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> # Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) # </a>: # 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
c0dbee2000-08-01Mirar (Pontus Hagland) # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Asuncion -3:50:40 - LMT 1890 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time -4:00 - PYT 1972 Oct # Paraguay Time -3:00 - PYT 1974 Apr -4:00 Para PY%sT # Peru # 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 1990 only - Jan 1 0:00 1:00 S Rule Peru 1990 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
2440ca2003-03-30Mirar (Pontus Hagland)  -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
c0dbee2000-08-01Mirar (Pontus Hagland)  -5:00 Peru PE%sT # Peru Time # South Georgia # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken -2:00 - GST # South Georgia Time # South Sandwich Is # uninhabited; scientific personnel have wintered # Suriname # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Paramaribo -3:40:40 - LMT 1911 -3:40:52 - PMT 1935 # Paramaribo Mean Time -3:40:36 - PMT 1945 Oct # The capital moved? -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time -3:30 - SRT 1984 Oct # Suriname Time -3:00 - SRT # Trinidad and Tobago # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 -4:00 - AST # Uruguay # From Paul Eggert <eggert@twinsun.com> (1993-11-18): # Uruguay wins the prize for the strangest peacetime manipulation of the rules. # 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 Rule Uruguay 1924 1926 - Apr 1 0:00 0 - Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS # Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman. Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - # Whitman gives 1937 Oct 3; go with Shanks. Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, # and 1943 Apr 13 ``to present time''; go with Shanks. Rule Uruguay 1941 only - Aug 1 0:00 0 - Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS Rule Uruguay 1942 only - Dec 14 0:00 1:00 S Rule Uruguay 1943 only - Mar 14 0:00 0 - Rule Uruguay 1959 only - May 24 0:00 1:00 S Rule Uruguay 1959 only - Nov 15 0:00 0 - Rule Uruguay 1960 only - Jan 17 0:00 1:00 S Rule Uruguay 1960 only - Mar 6 0:00 0 - Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S Rule Uruguay 1965 only - Sep 26 0:00 0 - Rule Uruguay 1966 1967 - Oct 31 0:00 0 - Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS Rule Uruguay 1968 1970 - Dec 2 0:00 0 - Rule Uruguay 1972 only - Apr 24 0:00 1:00 S Rule Uruguay 1972 only - Aug 15 0:00 0 - Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS Rule Uruguay 1974 only - Dec 22 0:00 1:00 S Rule Uruguay 1976 only - Oct 1 0:00 0 - Rule Uruguay 1977 only - Dec 4 0:00 1:00 S Rule Uruguay 1978 only - Apr 1 0:00 0 - Rule Uruguay 1979 only - Oct 1 0:00 1:00 S Rule Uruguay 1980 only - May 1 0:00 0 - Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 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 only - Oct 18 0:00 1:00 S Rule Uruguay 1993 only - Feb 28 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 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time -3:00 Uruguay UY%sT # Venezuela # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Caracas -4:27:44 - LMT 1890
2440ca2003-03-30Mirar (Pontus Hagland)  -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:30 - VET 1965 # Venezuela Time -4:00 - VET