84701a2007-02-01Henrik Grubbström (Grubba) # <pre>
be82612009-07-23Henrik Grubbström (Grubba) # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson.
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
a3beab2013-04-22Henrik Grubbström (Grubba) # tz@iana.org for general use in the future).
c0dbee2000-08-01Mirar (Pontus Hagland) 
84701a2007-02-01Henrik Grubbström (Grubba) # From Paul Eggert (2006-03-22):
c0dbee2000-08-01Mirar (Pontus Hagland) # A good source for time zone historical data outside the U.S. is
84701a2007-02-01Henrik Grubbström (Grubba) # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), # San Diego: ACS Publications, Inc. (2003).
c0dbee2000-08-01Mirar (Pontus Hagland) #
a3beab2013-04-22Henrik Grubbström (Grubba) # For data circa 1899, a common source is: # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # <http://www.jstor.org/stable/1774359>. #
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. #
84701a2007-02-01Henrik Grubbström (Grubba) # Except where otherwise noted, Shanks & Pottenger is the source for # entries through 1990, and IATA SSIM is the source for entries afterwards.
c0dbee2000-08-01Mirar (Pontus Hagland) # # 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
84701a2007-02-01Henrik Grubbström (Grubba) # From Hernan G. Otero (1995-06-26):
c0dbee2000-08-01Mirar (Pontus Hagland) # 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 #
84701a2007-02-01Henrik Grubbström (Grubba) # From Hernan G. Otero (1995-06-26):
c0dbee2000-08-01Mirar (Pontus Hagland) # These corrections were contributed by InterSoft Argentina S.A., # obtaining the data from the: # Talleres de Hidrografia Naval Argentina # (Argentine Naval Hydrography Institute) Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S #
84701a2007-02-01Henrik Grubbström (Grubba) # From Hernan G. Otero (1995-06-26):
c0dbee2000-08-01Mirar (Pontus Hagland) # 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
ca883b2008-04-03Henrik Grubbström (Grubba) # From Paul Eggert (2007-12-28): # DST was set to expire on March 5, not March 3, but since it was converted # to standard time on March 3 it's more convenient for us to pretend that # it ended on March 3. Rule Arg 2000 only - Mar 3 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. #
84701a2007-02-01Henrik Grubbström (Grubba) # From Fabian L. Arce Jofre (2000-04-04):
de860a2000-08-12Mirar (Pontus Hagland) # 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. #
ca883b2008-04-03Henrik Grubbström (Grubba) # From Steffen Thorsen (2007-12-21): # A user (Leonardo Chaim) reported that Argentina will adopt DST.... # all of the country (all Zone-entries) are affected. News reports like # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate # that Argentina will use DST next year as well, from October to # March, although exact rules are not given. # # From Jesper Norgaard Welen (2007-12-26) # The last hurdle of Argentina DST is over, the proposal was approved in # the lower chamber too (Deputados) with a vote 192 for and 2 against. # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to # the original scanned proposal, where the dates and the zero hours are # clear and unambiguous...This is the article about final approval: # <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996"> # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 # </a> # # From Paul Eggert (2007-12-22): # For dates after mid-2008, the following rules are my guesses and # are quite possibly wrong, but are more likely than no DST at all.
ecc1102009-03-20Henrik Grubbström (Grubba)  # From Alexander Krivenyshev (2008-09-05): # As per message from Carlos Alberto Fonseca Arauz (Nicaragua), # Argentina will start DST on Sunday October 19, 2008. # # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html"> # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html # </a> # OR # <a href="http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)"> # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) # </a> # From Rodrigo Severo (2008-10-06): # Here is some info available at a Gentoo bug related to TZ on Argentina's DST: # ... # ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 ------- # Hi, there is a problem with timezone-data-2008e and maybe with # timezone-data-2008f # Argentinian law [Number] 25.155 is no longer valid. # <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm"> # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm # </a> # The new one is law [Number] 26.350 # <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm"> # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm # </a> # So there is no summer time in Argentina for now. # From Mariano Absatz (2008-10-20): # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina # From 2008-10-19 until 2009-03-15 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01"> # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 # </a> # # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 2008/2009: # Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La Pampa, Neuquen, Rio Negro, Chubut, Santa Cruz # and Tierra del Fuego # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01"> # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 # </a> # # Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying # it will not apply DST either (even when it was not included in Decree 1705/2008) # <a href="http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc"> # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc # </a>
abd0a42009-11-15Henrik Grubbström (Grubba) # From fullinet (2009-10-18): # As announced in # <a hef="http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356"> # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 # </a> # (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change") # # "Por el momento, el Gobierno Nacional resolvio no modificar la hora # oficial, decision que estaba en estudio para su implementacion el # domingo 18 de octubre. Desde el Ministerio de Planificacion se anuncio # que la Argentina hoy, en estas condiciones meteorologicas, no necesita # la modificacion del huso horario, ya que 2009 nos encuentra con # crecimiento en la produccion y distribucion energetica."
ca883b2008-04-03Henrik Grubbström (Grubba) Rule Arg 2007 only - Dec 30 0:00 1:00 S
abd0a42009-11-15Henrik Grubbström (Grubba) Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 - Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
a3beab2013-04-22Henrik Grubbström (Grubba) 
84701a2007-02-01Henrik Grubbström (Grubba) # 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.
2440ca2003-03-30Mirar (Pontus Hagland) #
84701a2007-02-01Henrik Grubbström (Grubba) # From Paul Eggert (2006-03-22):
2440ca2003-03-30Mirar (Pontus Hagland) # <a href="http://www.spicasc.net/horvera.html">
84701a2007-02-01Henrik Grubbström (Grubba) # Hora de verano para la Republica Argentina (2003-06-08)
2440ca2003-03-30Mirar (Pontus Hagland) # </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
84701a2007-02-01Henrik Grubbström (Grubba) # over Shanks & Pottenger. # # 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
2440ca2003-03-30Mirar (Pontus Hagland) 
ecc1102009-03-20Henrik Grubbström (Grubba) # From Alex Krivenyshev (2008-01-17): # Here are articles that Argentina Province San Luis is planning to end DST # as earlier as upcoming Monday January 21, 2008 or February 2008: # # Provincia argentina retrasa reloj y marca diferencia con resto del pais # (Argentine Province delayed clock and mark difference with the rest of the # country) # <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel"> # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel # </a> # # Es inminente que en San Luis atrasen una hora los relojes # (It is imminent in San Luis clocks one hour delay) # <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414"> # http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414 # </a> # # <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html"> # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html # </a> # From Jesper Norgaard Welen (2008-01-18): # The page of the San Luis provincial government # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812"> # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 # </a> # confirms what Alex Krivenyshev has earlier sent to the tz # emailing list about that San Luis plans to return to standard # time much earlier than the rest of the country. It also
a3beab2013-04-22Henrik Grubbström (Grubba) # confirms that upon request the provinces San Juan and Mendoza # refused to follow San Luis in this change. #
ecc1102009-03-20Henrik Grubbström (Grubba) # The change is supposed to take place Monday the 21.st at 0:00 # hours. As far as I understand it if this goes ahead, we need # a new timezone for San Luis (although there are also documented # independent changes in the southamerica file of San Luis in # 1990 and 1991 which has not been confirmed). # From Jesper Norgaard Welen (2008-01-25): # Unfortunately the below page has become defunct, about the San Luis # time change. Perhaps because it now is part of a group of pages "Most # important pages of 2008." # # You can use # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834"> # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 # </a> # instead it seems. Or use "Buscador" from the main page of the San Luis # government, and fill in "huso" and click OK, and you will get 3 pages # from which the first one is identical to the above. # From Mariano Absatz (2008-01-28): # I can confirm that the Province of San Luis (and so far only that # province) decided to go back to UTC-3 effective midnight Jan 20th 2008 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back # 1 hour), and they intend to keep UTC-3 as their timezone all year round # (that is, unless they change their mind any minute now). # # So we'll have to add yet another city to 'southamerica' (I think San # Luis city is the mos populated city in the Province, so it'd be # America/Argentina/San_Luis... of course I can't remember if San Luis's # history of particular changes goes along with Mendoza or San Juan :-( # (I only remember not being able to collect hard facts about San Luis # back in 2004, when these provinces changed to UTC-4 for a few days, I # mailed them personally and never got an answer). # From Paul Eggert (2008-06-30):
84701a2007-02-01Henrik Grubbström (Grubba) # Unless otherwise specified, data are from Shanks & Pottenger through 1992, # from the IATA otherwise. As noted below, Shanks & Pottenger say that
ecc1102009-03-20Henrik Grubbström (Grubba) # America/Cordoba split into 6 subregions during 1991/1992, one of which # was America/San_Luis, but we haven't verified this yet so for now we'll # keep America/Cordoba a single region rather than splitting it into the # other 5 subregions.
f34d232009-06-28Henrik Grubbström (Grubba) # From Mariano Absatz (2009-03-13): # Yesterday (with our usual 2-day notice) the Province of San Luis # decided that next Sunday instead of "staying" @utc-03:00 they will go # to utc-04:00 until the second Saturday in October... # # The press release is at # <a href="http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102"> # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 # </a> # (I couldn't find the decree, but # <a href="http://www.sanluis.gov.ar"> # www.sanluis.gov.ar # <a/> # is the official page for the Province Government). #
a3beab2013-04-22Henrik Grubbström (Grubba) # There's also a note in only one of the major national papers ...
f34d232009-06-28Henrik Grubbström (Grubba) # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
a3beab2013-04-22Henrik Grubbström (Grubba) # # The press release says [quick and dirty translation]: # ... announced that next Sunday, at 00:00, Puntanos (the San Luis
f34d232009-06-28Henrik Grubbström (Grubba) # inhabitants) will have to turn back one hour their clocks # # Since then, San Luis will establish its own Province timezone. Thus, # during 2009, this timezone change will run from 00:00 the third Sunday # in March until 24:00 of the second Saturday in October.
abd0a42009-11-15Henrik Grubbström (Grubba) # From Mariano Absatz (2009-10-16): # ...the Province of San Luis is a case in itself. # # The Law at # <a href="http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276>" # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
f34d232009-06-28Henrik Grubbström (Grubba) # </a>
abd0a42009-11-15Henrik Grubbström (Grubba) # is ambiguous because establishes a calendar from the 2nd Sunday in # October at 0:00 thru the 2nd Saturday in March at 24:00 and the # complement of that starting on the 2nd Sunday of March at 0:00 and # ending on the 2nd Saturday of March at 24:00. # # This clearly breaks every time the 1st of March or October is a Sunday. # # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd # Sunday of October and March. # # The problem is that the changes in the rest of the Provinces that did # change in 2007/2008, were made according to the Federal Law and Decrees # that did so on the 3rd Sunday of October and March.
2440ca2003-03-30Mirar (Pontus Hagland) #
abd0a42009-11-15Henrik Grubbström (Grubba) # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday # (October 11th) at 0:00. # # So I guess a new set of rules, besides "Arg", must be made and the last # America/Argentina/San_Luis entries should change to use these... # # I'm enclosing a patch that does what I say... regretfully, the San Luis # timezone must be called "WART/WARST" even when most of the time (like, # right now) WARST == ART... that is, since last Sunday, all the country # is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest # of the country calls it "ART". # ...
c4ff9d2010-05-12Henrik Grubbström (Grubba) # From Alexander Krivenyshev (2010-04-09): # According to news reports from El Diario de la Republica Province San # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time # after April 11, 2010--will continue to have same time as rest of # Argentina (UTC-3) (no DST). # # Confirmaron la pr&oacute;rroga del huso horario de verano (Spanish) # <a href="http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9"> # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 # </a> # or (some English translation): # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina08.html"> # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html # </a> # From Mariano Absatz (2010-04-12): # yes...I can confirm this...and given that San Luis keeps calling # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" # rules...San Luis is still using "Western ARgentina Time" and it got # stuck on Summer daylight savings time even though the summer is over.
a3beab2013-04-22Henrik Grubbström (Grubba) # From Paul Eggert (2013-02-21): # Milne says Cordoba time was -4:16:48.2. Round to the nearest second.
c0dbee2000-08-01Mirar (Pontus Hagland) # Zone NAME GMTOFF RULES FORMAT [UNTIL] #
84701a2007-02-01Henrik Grubbström (Grubba) # Buenos Aires (BA), Capital Federal (CF), Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
2440ca2003-03-30Mirar (Pontus Hagland)  -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
ca883b2008-04-03Henrik Grubbström (Grubba)  -3:00 Arg AR%sT
c0dbee2000-08-01Mirar (Pontus Hagland) #
ecc1102009-03-20Henrik Grubbström (Grubba) # Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
2440ca2003-03-30Mirar (Pontus Hagland) #
84701a2007-02-01Henrik Grubbström (Grubba) # Shanks & Pottenger also make the following claims, which we haven't verified:
2440ca2003-03-30Mirar (Pontus Hagland) # - 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. # - Santiago del Estero switched to -4:00 on 1991-04-01, # then to -3:00 on 1991-04-26. #
84701a2007-02-01Henrik Grubbström (Grubba) 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 Mar 3 -4:00 - WART 1991 Oct 20 -3:00 Arg AR%sT 1999 Oct 3 -4:00 Arg AR%sT 2000 Mar 3
ca883b2008-04-03Henrik Grubbström (Grubba)  -3:00 Arg AR%sT
84701a2007-02-01Henrik Grubbström (Grubba) #
ecc1102009-03-20Henrik Grubbström (Grubba) # Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN) Zone America/Argentina/Salta -4:21:40 - 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 Arg AR%sT 2008 Oct 18 -3:00 - ART #
84701a2007-02-01Henrik Grubbström (Grubba) # Tucuman (TM) Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
2440ca2003-03-30Mirar (Pontus Hagland)  -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
84701a2007-02-01Henrik Grubbström (Grubba)  -3:00 - ART 2004 Jun 1 -4:00 - WART 2004 Jun 13
ca883b2008-04-03Henrik Grubbström (Grubba)  -3:00 Arg AR%sT
84701a2007-02-01Henrik Grubbström (Grubba) # # 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
ecc1102009-03-20Henrik Grubbström (Grubba)  -3:00 Arg AR%sT 2008 Oct 18 -3:00 - ART
84701a2007-02-01Henrik Grubbström (Grubba) # # 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
ecc1102009-03-20Henrik Grubbström (Grubba)  -3:00 Arg AR%sT 2008 Oct 18 -3:00 - ART
c0dbee2000-08-01Mirar (Pontus Hagland) # # Jujuy (JY)
84701a2007-02-01Henrik Grubbström (Grubba) Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
2440ca2003-03-30Mirar (Pontus Hagland)  -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
ecc1102009-03-20Henrik Grubbström (Grubba)  -3:00 Arg AR%sT 2008 Oct 18 -3:00 - ART
c0dbee2000-08-01Mirar (Pontus Hagland) #
84701a2007-02-01Henrik Grubbström (Grubba) # Catamarca (CT), Chubut (CH) Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
2440ca2003-03-30Mirar (Pontus Hagland)  -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
84701a2007-02-01Henrik Grubbström (Grubba)  -3:00 - ART 2004 Jun 1 -4:00 - WART 2004 Jun 20
ecc1102009-03-20Henrik Grubbström (Grubba)  -3:00 Arg AR%sT 2008 Oct 18 -3:00 - ART
c0dbee2000-08-01Mirar (Pontus Hagland) # # Mendoza (MZ)
84701a2007-02-01Henrik Grubbström (Grubba) Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
2440ca2003-03-30Mirar (Pontus Hagland)  -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
84701a2007-02-01Henrik Grubbström (Grubba)  -3:00 - ART 2004 May 23 -4:00 - WART 2004 Sep 26
ecc1102009-03-20Henrik Grubbström (Grubba)  -3:00 Arg AR%sT 2008 Oct 18 -3:00 - ART # # San Luis (SL)
abd0a42009-11-15Henrik Grubbström (Grubba) 
c4ff9d2010-05-12Henrik Grubbström (Grubba) Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - Rule SanLuis 2007 2009 - Oct Sun>=8 0:00 1:00 S
abd0a42009-11-15Henrik Grubbström (Grubba) 
ecc1102009-03-20Henrik Grubbström (Grubba) Zone America/Argentina/San_Luis -4:25:24 - 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 1990 -3:00 1:00 ARST 1990 Mar 14 -4:00 - WART 1990 Oct 15 -4:00 1:00 WARST 1991 Mar 1 -4:00 - WART 1991 Jun 1 -3:00 - ART 1999 Oct 3 -4:00 1:00 WARST 2000 Mar 3 -3:00 - ART 2004 May 31 -4:00 - WART 2004 Jul 25 -3:00 Arg AR%sT 2008 Jan 21
abd0a42009-11-15Henrik Grubbström (Grubba)  -4:00 SanLuis WAR%sT
84701a2007-02-01Henrik Grubbström (Grubba) # # 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
ecc1102009-03-20Henrik Grubbström (Grubba)  -3:00 Arg AR%sT 2008 Oct 18 -3:00 - ART
84701a2007-02-01Henrik Grubbström (Grubba) # # 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
ecc1102009-03-20Henrik Grubbström (Grubba)  -3:00 Arg AR%sT 2008 Oct 18 -3:00 - ART
c0dbee2000-08-01Mirar (Pontus Hagland)  # 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
84701a2007-02-01Henrik Grubbström (Grubba) # From Paul Eggert (1993-11-18):
c0dbee2000-08-01Mirar (Pontus Hagland) # 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)...
84701a2007-02-01Henrik Grubbström (Grubba) # 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.
ca883b2008-04-03Henrik Grubbström (Grubba) # From Steffen Thorsen (2007-09-20): # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
ecc1102009-03-20Henrik Grubbström (Grubba) # From Paul Schulze (2008-06-24): # ...by law number 11.662 of April 24, 2008 (published in the "Diario # Oficial da Uniao"...) in Brazil there are changes in the timezones, # effective today (00:00am at June 24, 2008) as follows: # # a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the # part of the Amazonas state that had this timezone now being put to the # timezone UTC+4 # b) The whole Para state now is put at timezone UTC+3, instead of just # part of it, as was before. # # This change follows a proposal of senator Tiao Viana of Acre state, that # proposed it due to concerns about open television channels displaying # programs inappropriate to youths in the states that had the timezone # UTC+5 too early in the night. In the occasion, some more corrections # were proposed, trying to unify the timezones of any given state. This # change modifies timezone rules defined in decree 2.784 of 18 June, # 1913. # From Rodrigo Severo (2008-06-24): # Just correcting the URL:
be82612009-07-23Henrik Grubbström (Grubba) # <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008"> # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
ecc1102009-03-20Henrik Grubbström (Grubba) # </a> # # As a result of the above Decree I believe the America/Rio_Branco # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
112c2e2011-09-20Henrik Grubbström (Grubba) # be created to represent the...west side of the Para State. I
ecc1102009-03-20Henrik Grubbström (Grubba) # suggest this new timezone be called Santarem as the most # important/populated city in the affected area. # # This new timezone would be the same as the Rio_Branco timezone up to # the 2008/06/24 change which would be to UTC-3 instead of UTC-4. # From Alex Krivenyshev (2008-06-24): # This is a quick reference page for New and Old Brazil Time Zones map. # <a href="http://www.worldtimezone.com/brazil-time-new-old.php"> # http://www.worldtimezone.com/brazil-time-new-old.php # </a> # # - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05 # (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western # part of Par state is moving to one timezone UTC- 03 (from UTC -04).
2440ca2003-03-30Mirar (Pontus Hagland) # 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
84701a2007-02-01Henrik Grubbström (Grubba) # </a>.
c0dbee2000-08-01Mirar (Pontus Hagland) 
ecc1102009-03-20Henrik Grubbström (Grubba) # From Steffen Thorsen (2008-08-29): # As announced by the government and many newspapers in Brazil late # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and # it will end on 2009-02-15 (current rule for Brazil is fine). Based on # past years experience with the elections, there was a good chance that # the start was postponed to November, but it did not happen this year. # # It has not yet been posted to http://pcdsh01.on.br/DecHV.html # # An official page about it: # <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722"> # http://www.mme.gov.br/site/news/detail.do?newsId=16722 # </a> # Note that this link does not always work directly, but must be accessed # by going to # <a href="http://www.mme.gov.br/first"> # http://www.mme.gov.br/first # </a> # # One example link that works directly: # <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54"> # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 # (Portuguese) # </a> # # We have a written a short article about it as well: # <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html"> # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html # </a>
24e5a42011-10-31Henrik Grubbström (Grubba) # # From Alexander Krivenyshev (2011-10-04): # State Bahia will return to Daylight savings time this year after 8 years off.
a3beab2013-04-22Henrik Grubbström (Grubba) # The announcement was made by Governor Jaques Wagner in an interview to a # television station in Salvador.
24e5a42011-10-31Henrik Grubbström (Grubba)  # In Portuguese: # <a href="http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html"> # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html # </a> and # <a href="http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html"> # http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html # </a> # From Guilherme Bernardes Rodrigues (2011-10-07): # There is news in the media, however there is still no decree about it.
a3beab2013-04-22Henrik Grubbström (Grubba) # I just send a e-mail to Zulmira Brandao at
24e5a42011-10-31Henrik Grubbström (Grubba) # <a href="http://pcdsh01.on.br/">http://pcdsh01.on.br/</a> the
a3beab2013-04-22Henrik Grubbström (Grubba) # official agency about time in Brazil, and she confirmed that the old rule is
24e5a42011-10-31Henrik Grubbström (Grubba) # still in force.
ecc1102009-03-20Henrik Grubbström (Grubba) 
d91f2a2012-05-18Henrik Grubbström (Grubba) # From Guilherme Bernardes Rodrigues (2011-10-14) # It's official, the President signed a decree that includes Bahia in summer # time. # [ and in a second message (same day): ] # I found the decree. # # DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011 # Link : # <a href="http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6"> # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 # </a>
a3beab2013-04-22Henrik Grubbström (Grubba) # From Kelley Cook (2012-10-16): # The governor of state of Bahia in Brazil announced on Thursday that # due to public pressure, he is reversing the DST policy they implemented # last year and will not be going to Summer Time on October 21st.... # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia # From Rodrigo Severo (2012-10-16): # Tocantins state will have DST. # http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
d91f2a2012-05-18Henrik Grubbström (Grubba) 
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.
84701a2007-02-01Henrik Grubbström (Grubba) # Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22; # web page corrected 2004-01-07) adopted by same states, minus AM.
c0dbee2000-08-01Mirar (Pontus Hagland) # Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
84701a2007-02-01Henrik Grubbström (Grubba) # adopted by same states, plus MT and TO.
c0dbee2000-08-01Mirar (Pontus Hagland) # 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 -
84701a2007-02-01Henrik Grubbström (Grubba) # From Daniel C. Sobral (1998-02-12):
c0dbee2000-08-01Mirar (Pontus Hagland) # 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. # # 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
84701a2007-02-01Henrik Grubbström (Grubba) Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
2440ca2003-03-30Mirar (Pontus Hagland) # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
ecc1102009-03-20Henrik Grubbström (Grubba) # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
2440ca2003-03-30Mirar (Pontus Hagland) Rule Brazil 2002 only - Nov 3 0:00 1:00 S
84701a2007-02-01Henrik Grubbström (Grubba) # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
ecc1102009-03-20Henrik Grubbström (Grubba) # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
84701a2007-02-01Henrik Grubbström (Grubba) Rule Brazil 2003 only - Oct 19 0:00 1:00 S # Decree 5,223 (2004-10-01) reestablishes DST in MT.
ecc1102009-03-20Henrik Grubbström (Grubba) # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
84701a2007-02-01Henrik Grubbström (Grubba) Rule Brazil 2004 only - Nov 2 0:00 1:00 S # Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19), # adopted by the same states as before. Rule Brazil 2005 only - Oct 16 0:00 1:00 S
ca883b2008-04-03Henrik Grubbström (Grubba) # Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03), # adopted by the same states as before. Rule Brazil 2006 only - Nov 5 0:00 1:00 S Rule Brazil 2007 only - Feb 25 0:00 0 -
ecc1102009-03-20Henrik Grubbström (Grubba) # Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26), # adopted by the same states as before. Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S # From Frederico A. C. Neves (2008-09-10): # Acording to this decree # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm"> # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm # </a> # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the # 3rd Feb Sunday. There is an exception on the return date when this is # the Carnival Sunday then the return date will be the next Sunday... Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - Rule Brazil 2012 only - Feb Sun>=22 0:00 0 - Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - Rule Brazil 2015 only - Feb Sun>=22 0:00 0 - Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 - Rule Brazil 2023 only - Feb Sun>=22 0:00 0 - Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 - Rule Brazil 2026 only - Feb Sun>=22 0:00 0 - Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 - Rule Brazil 2034 only - Feb Sun>=22 0:00 0 - Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 - Rule Brazil 2037 only - Feb Sun>=22 0:00 0 - # From Arthur David Olson (2008-09-29): # The next is wrong in some years but is better than nothing. Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
84701a2007-02-01Henrik Grubbström (Grubba) # The latest ruleset listed above says that the following states observe DST: # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
c0dbee2000-08-01Mirar (Pontus Hagland)  # Zone NAME GMTOFF RULES FORMAT [UNTIL] #
84701a2007-02-01Henrik Grubbström (Grubba) # Fernando de Noronha (administratively part of PE)
c0dbee2000-08-01Mirar (Pontus Hagland) Zone America/Noronha -2:09:40 - LMT 1914 -2:00 Brazil FN%sT 1990 Sep 17
84701a2007-02-01Henrik Grubbström (Grubba)  -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
c0dbee2000-08-01Mirar (Pontus Hagland)  -2:00 - FNT
84701a2007-02-01Henrik Grubbström (Grubba) # 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.
c0dbee2000-08-01Mirar (Pontus Hagland) # # Amapa (AP), east Para (PA)
01c4092001-01-09Mirar (Pontus Hagland) # East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
84701a2007-02-01Henrik Grubbström (Grubba) # 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.
c0dbee2000-08-01Mirar (Pontus Hagland) Zone America/Belem -3:13:56 - LMT 1914 -3:00 Brazil BR%sT 1988 Sep 12 -3:00 - BRT #
ecc1102009-03-20Henrik Grubbström (Grubba) # west Para (PA) # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. Zone America/Santarem -3:38:48 - LMT 1914 -4:00 Brazil AM%sT 1988 Sep 12 -4:00 - AMT 2008 Jun 24 00:00 -3:00 - BRT #
c0dbee2000-08-01Mirar (Pontus Hagland) # 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
84701a2007-02-01Henrik Grubbström (Grubba)  -3:00 Brazil BR%sT 2003 Sep 24
a3beab2013-04-22Henrik Grubbström (Grubba)  -3:00 - BRT 2012 Oct 21 -3:00 Brazil BR%sT
c0dbee2000-08-01Mirar (Pontus Hagland) # # 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) #
84701a2007-02-01Henrik Grubbström (Grubba) # 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
d91f2a2012-05-18Henrik Grubbström (Grubba)  -3:00 - BRT 2011 Oct 16
a3beab2013-04-22Henrik Grubbström (Grubba)  -3:00 Brazil BR%sT 2012 Oct 21 -3:00 - BRT
84701a2007-02-01Henrik Grubbström (Grubba) # # Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
c0dbee2000-08-01Mirar (Pontus Hagland) # 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 #
84701a2007-02-01Henrik Grubbström (Grubba) # Mato Grosso do Sul (MS) Zone America/Campo_Grande -3:38:28 - LMT 1914 -4:00 Brazil AM%sT # # Mato Grosso (MT)
c0dbee2000-08-01Mirar (Pontus Hagland) Zone America/Cuiaba -3:44:20 - LMT 1914
84701a2007-02-01Henrik Grubbström (Grubba)  -4:00 Brazil AM%sT 2003 Sep 24 -4:00 - AMT 2004 Oct 1
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:00 Brazil AM%sT #
ecc1102009-03-20Henrik Grubbström (Grubba) # Rondonia (RO)
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
84701a2007-02-01Henrik Grubbström (Grubba) # The great circle line from Tabatinga to Porto Acre divides # east from west Amazonas.
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
ecc1102009-03-20Henrik Grubbström (Grubba)  -5:00 - ACT 2008 Jun 24 00:00 -4:00 - AMT
01c4092001-01-09Mirar (Pontus Hagland) #
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
ecc1102009-03-20Henrik Grubbström (Grubba)  -5:00 - ACT 2008 Jun 24 00:00 -4:00 - AMT
c0dbee2000-08-01Mirar (Pontus Hagland)  # 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).
84701a2007-02-01Henrik Grubbström (Grubba) # From Oscar van Vlijmen (2006-10-08): # http://www.horaoficial.cl/cambio.htm
2440ca2003-03-30Mirar (Pontus Hagland) 
84701a2007-02-01Henrik Grubbström (Grubba) # From Jesper Norgaard Welen (2006-10-08): # I think that there are some obvious mistakes in the suggested link # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15 # (they should have been 1990-09-15 and 1990-09-16 respectively), but # anyhow it clears up some doubts too.
2440ca2003-03-30Mirar (Pontus Hagland) 
84701a2007-02-01Henrik Grubbström (Grubba) # From Paul Eggert (2006-12-27): # The following data for Chile and America/Santiago are from # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by # Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks # & Pottenger, except with DST transitions after 1932 cloned from # America/Santiago. The pre-1980 Pacific/Easter data are dubious, # but we have no other source.
2440ca2003-03-30Mirar (Pontus Hagland) 
ca883b2008-04-03Henrik Grubbström (Grubba) # From German Poo-Caaman~o (2008-03-03): # Due to drought, Chile extends Daylight Time in three weeks. This # is one-time change (Saturday 3/29 at 24:00 for America/Santiago # and Saturday 3/29 at 22:00 for Pacific/Easter)
a3beab2013-04-22Henrik Grubbström (Grubba) # The Supreme Decree is located at
ca883b2008-04-03Henrik Grubbström (Grubba) # <a href="http://www.shoa.cl/servicios/supremo316.pdf"> # http://www.shoa.cl/servicios/supremo316.pdf # </a> # and the instructions for 2008 are located in: # <a href="http://www.horaoficial.cl/cambio.htm"> # http://www.horaoficial.cl/cambio.htm # </a>.
ecc1102009-03-20Henrik Grubbström (Grubba) # From Jose Miguel Garrido (2008-03-05):
ca883b2008-04-03Henrik Grubbström (Grubba) # ...
a3beab2013-04-22Henrik Grubbström (Grubba) # You could see the announces of the change on
ca883b2008-04-03Henrik Grubbström (Grubba) # <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm"> # http://www.shoa.cl/noticias/2008/04hora/hora.htm # </a>.
c4ff9d2010-05-12Henrik Grubbström (Grubba) # From Angel Chiang (2010-03-04): # Subject: DST in Chile exceptionally extended to 3 April due to earthquake # <a href="http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098"> # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 # </a> # (in Spanish, last paragraph). # # This is breaking news. There should be more information available later. # From Arthur Daivd Olson (2010-03-06): # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
9fa5fc2011-03-25Henrik Grubbström (Grubba) # From Glenn Eychaner (2011-03-02): [geychaner@mac.com] # It appears that the Chilean government has decided to postpone the # change from summer time to winter time again, by three weeks to April # 2nd: # <a href="http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651"> # http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651 # </a> # # This is not yet reflected in the offical "cambio de hora" site, but # probably will be soon: # <a href="http://www.horaoficial.cl/cambio.htm"> # http://www.horaoficial.cl/cambio.htm # </a> # From Arthur David Olson (2011-03-02): # The emol.com article mentions a water shortage as the cause of the # postponement, which may mean that it's not a permanent change.
112c2e2011-09-20Henrik Grubbström (Grubba)  # From Glenn Eychaner (2011-03-28): # The article: # <a href="http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}"> # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} # </a> # # In English: # Chile's clocks will go back an hour this year on the 7th of May instead # of this Saturday. They will go forward again the 3rd Saturday in # August, not in October as they have since 1968. This is a pilot plan # which will be reevaluated in 2012.
d91f2a2012-05-18Henrik Grubbström (Grubba) # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): # As stated in the website of the Chilean Energy Ministry # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html # The Chilean Government has decided to postpone the entrance into winter time # (to leave DST) from March 11 2012 to April 28th 2012. The decision has not # been yet formalized but it will within the next days. # Quote from the website communication: # # 6. For the year 2012, the dates of entry into winter time will be as follows: # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 # of the same day. # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be # 01:00 on September 2.
a3beab2013-04-22Henrik Grubbström (Grubba)  # From Steffen Thorsen (2013-02-15): # According to several news sources, Chile has extended DST this year, # they will end DST later and start DST earlier than planned. They # hope to save energy. The new end date is 2013-04-28 00:00 and new # start date is 2013-09-08 00:00.... # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
d91f2a2012-05-18Henrik Grubbström (Grubba)  # NOTE: ChileAQ rules for Antarctic bases are stored separately in the # 'antarctica' file.
c0dbee2000-08-01Mirar (Pontus Hagland) # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
84701a2007-02-01Henrik Grubbström (Grubba) Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
c0dbee2000-08-01Mirar (Pontus Hagland) Rule Chile 1928 1932 - Apr 1 0:00 0 -
84701a2007-02-01Henrik Grubbström (Grubba) Rule Chile 1942 only - Jun 1 4:00u 0 - Rule Chile 1942 only - Aug 1 5:00u 1:00 S Rule Chile 1946 only - Jul 15 4:00u 1:00 S Rule Chile 1946 only - Sep 1 3:00u 0:00 - Rule Chile 1947 only - Apr 1 4:00u 0 - Rule Chile 1968 only - Nov 3 4:00u 1:00 S Rule Chile 1969 only - Mar 30 3:00u 0 - Rule Chile 1969 only - Nov 23 4:00u 1:00 S Rule Chile 1970 only - Mar 29 3:00u 0 - Rule Chile 1971 only - Mar 14 3:00u 0 - Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - Rule Chile 1973 only - Sep 30 4:00u 1:00 S Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S Rule Chile 1987 only - Apr 12 3:00u 0 - Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 - Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S Rule Chile 1990 only - Mar 18 3:00u 0 - Rule Chile 1990 only - Sep 16 4:00u 1:00 S Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S Rule Chile 1997 only - Mar 30 3:00u 0 - Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
2440ca2003-03-30Mirar (Pontus Hagland) Rule Chile 1998 only - Sep 27 4:00u 1:00 S Rule Chile 1999 only - Apr 4 3:00u 0 -
112c2e2011-09-20Henrik Grubbström (Grubba) Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
ca883b2008-04-03Henrik Grubbström (Grubba) Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - # N.B.: the end of March 29 in Chile is March 30 in Universal time, # which is used below in specifying the transition. Rule Chile 2008 only - Mar 30 3:00u 0 -
c4ff9d2010-05-12Henrik Grubbström (Grubba) Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
112c2e2011-09-20Henrik Grubbström (Grubba) Rule Chile 2010 only - Apr Sun>=1 3:00u 0 - Rule Chile 2011 only - May Sun>=2 3:00u 0 -
d91f2a2012-05-18Henrik Grubbström (Grubba) Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
a3beab2013-04-22Henrik Grubbström (Grubba) Rule Chile 2012 max - Apr Sun>=23 3:00u 0 - Rule Chile 2012 max - Sep Sun>=2 4:00u 1:00 S
84701a2007-02-01Henrik Grubbström (Grubba) # IATA SSIM anomalies: (1992-02) says 1992-03-14;
c0dbee2000-08-01Mirar (Pontus Hagland) # (1996-09) says 1998-03-08. Ignore these. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
84701a2007-02-01Henrik Grubbström (Grubba) Zone America/Santiago -4:42:46 - LMT 1890 -4:42:46 - SMT 1910 # Santiago Mean Time -5:00 - CLT 1916 Jul 1 # Chile Time -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time -4:00 - CLT 1919 Jul 1 # Chile Time -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time -5:00 Chile CL%sT 1947 May 22 # Chile Time
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:00 Chile CL%sT
84701a2007-02-01Henrik Grubbström (Grubba) Zone Pacific/Easter -7:17:44 - LMT 1890
6ba2da2007-03-07Martin Nilsson  -7:17:28 - EMT 1932 Sep # Easter Mean Time
84701a2007-02-01Henrik Grubbström (Grubba)  -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
c0dbee2000-08-01Mirar (Pontus Hagland)  -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
a3beab2013-04-22Henrik Grubbström (Grubba)  # Milne gives 4:56:16.4 for Bogota time in 1899; round to nearest. He writes, # "A variation of fifteen minutes in the public clocks of Bogota is not rare."
c0dbee2000-08-01Mirar (Pontus Hagland) # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
84701a2007-02-01Henrik Grubbström (Grubba) Rule CO 1992 only - May 3 0:00 1:00 S Rule CO 1993 only - Apr 4 0:00 0 -
c0dbee2000-08-01Mirar (Pontus Hagland) # Zone NAME GMTOFF RULES FORMAT [UNTIL]
a3beab2013-04-22Henrik Grubbström (Grubba) Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 -4:56:16 - BMT 1914 Nov 23 # Bogota Mean Time
c0dbee2000-08-01Mirar (Pontus Hagland)  -5:00 CO CO%sT # Colombia Time # Malpelo, Providencia, San Andres # no information; probably like America/Bogota # Curacao
a3beab2013-04-22Henrik Grubbström (Grubba)  # Milne gives 4:35:46.9 for Curacao mean time; round to nearest.
84701a2007-02-01Henrik Grubbström (Grubba) #
ca883b2008-04-03Henrik Grubbström (Grubba) # From Paul Eggert (2006-03-22):
84701a2007-02-01Henrik Grubbström (Grubba) # Shanks & Pottenger say that The Bottom and Philipsburg 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. The former is dubious, since S&P also say # Saba Island has been like Curacao.
ca883b2008-04-03Henrik Grubbström (Grubba) # This all predates our 1970 cutoff, though.
84701a2007-02-01Henrik Grubbström (Grubba) # # By July 2007 Curacao and St Maarten are planned to become # associated states within the Netherlands, much like Aruba; # Bonaire, Saba and St Eustatius would become directly part of the # Netherlands as Kingdom Islands. This won't affect their time zones # though, as far as we know.
ca883b2008-04-03Henrik Grubbström (Grubba) #
c0dbee2000-08-01Mirar (Pontus Hagland) # Zone NAME GMTOFF RULES FORMAT [UNTIL]
a3beab2013-04-22Henrik Grubbström (Grubba) Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
c0dbee2000-08-01Mirar (Pontus Hagland)  -4:30 - ANT 1965 # Netherlands Antilles Time -4:00 - AST
112c2e2011-09-20Henrik Grubbström (Grubba) # From Arthur David Olson (2011-06-15): # At least for now, use links for places with new iso3166 codes. # The name "Lower Prince's Quarter" is both longer than fourteen charaters # and contains an apostrophe; use "Lower_Princes" below. Link America/Curacao America/Lower_Princes # Sint Maarten Link America/Curacao America/Kralendijk # Bonaire, Sint Estatius and Saba
c0dbee2000-08-01Mirar (Pontus Hagland) # Ecuador
ca883b2008-04-03Henrik Grubbström (Grubba) #
a3beab2013-04-22Henrik Grubbström (Grubba) # Milne says the Sentral and South American Telegraph Company used -5:24:15. #
ca883b2008-04-03Henrik Grubbström (Grubba) # From Paul Eggert (2007-03-04): # Apparently Ecuador had a failed experiment with DST in 1992. # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both # talk about "hora Sixto". Leave this alone for now, as we have no data. #
c0dbee2000-08-01Mirar (Pontus Hagland) # 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) 
84701a2007-02-01Henrik Grubbström (Grubba) # From Paul Eggert (2006-03-22): # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
2440ca2003-03-30Mirar (Pontus Hagland)  # 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.
112c2e2011-09-20Henrik Grubbström (Grubba) # From Steffen Thorsen (2011-04-01): # The Falkland Islands will not turn back clocks this winter, but stay on # daylight saving time. # # One source: # <a href="http://www.falklandnews.com/public/story.cfm?get=5914&source=3"> # http://www.falklandnews.com/public/story.cfm?get=5914&source=3 # </a> # # We have gotten this confirmed by a clerk of the legislative assembly: # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 # hours) on the first Sunday of September at 0200hrs. # # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands # will not revert to local mean time, but clocks will remain on Summer # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term # change to local time following the trial period will be notified.
d91f2a2012-05-18Henrik Grubbström (Grubba) # # From Andrew Newman (2012-02-24) # A letter from Justin McPhee, Chief Executive, # Cable & Wireless Falkland Islands (dated 2012-02-22) # states... # The current Atlantic/Stanley entry under South America expects the # clocks to go back to standard Falklands Time (FKT) on the 15th April. # The database entry states that in 2011 Stanley was staying on fixed # summer time on a trial basis only. FIG need to contact IANA and/or # the maintainers of the database to inform them we're adopting # the same policy this year and suggest recommendations for future years. # # For now we will assume permanent summer time for the Falklands # until advised differently (to apply for 2012 and beyond, after the 2011 # experiment was apparently successful.)
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 -
112c2e2011-09-20Henrik Grubbström (Grubba) Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
d91f2a2012-05-18Henrik Grubbström (Grubba) Rule Falk 2001 2010 - 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
d91f2a2012-05-18Henrik Grubbström (Grubba)  -4:00 Falk FK%sT 2010 Sep 5 02:00 -3:00 - FKST
c0dbee2000-08-01Mirar (Pontus Hagland)  # 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
84701a2007-02-01Henrik Grubbström (Grubba) # From Paul Eggert (2006-03-22): # Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00, # and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
c0dbee2000-08-01Mirar (Pontus Hagland) # 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. # Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
84701a2007-02-01Henrik Grubbström (Grubba) # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
2440ca2003-03-30Mirar (Pontus Hagland) Rule Para 1997 only - Feb lastSun 0:00 0 -
84701a2007-02-01Henrik Grubbström (Grubba) # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
2440ca2003-03-30Mirar (Pontus Hagland) # (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.
84701a2007-02-01Henrik Grubbström (Grubba) Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S # # From Jesper Norgaard Welen (2005-01-02): # There are several sources that claim that Paraguay made # a timezone rule change in autumn 2004. # From Steffen Thorsen (2005-01-05): # Decree 1,867 (2004-03-05) # From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13) # <http://www.presidencia.gov.py/decretos/D1867.pdf>
c4ff9d2010-05-12Henrik Grubbström (Grubba) Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S Rule Para 2005 2009 - Mar Sun>=8 0:00 0 - # From Carlos Raul Perasso (2010-02-18): # By decree number 3958 issued yesterday ( # <a href="http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf"> # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf # </a> # ) # Paraguay changes its DST schedule, postponing the March rule to April and # modifying the October date. The decree reads: # ... # Art. 1. It is hereby established that from the second Sunday of the month of # April of this year (2010), the official time is to be set back 60 minutes, # and that on the first Sunday of the month of October, it is to be set # forward 60 minutes, in all the territory of the Paraguayan Republic. # ... Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S Rule Para 2010 max - Apr Sun>=8 0:00 0 -
a3beab2013-04-22Henrik Grubbström (Grubba) # # From Steffen Thorsen (2013-03-07): # Paraguay will end DST on 2013-03-24 00:00.... # They do not tell if this will be a permanent change or just this year.... # http://www.ande.gov.py/interna.php?id=1075 # # From Paul Eggert (2013-03-07): # For now, assume it's just this year. Rule Para 2013 only - Mar 24 0:00 0 -
2440ca2003-03-30Mirar (Pontus Hagland) 
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
84701a2007-02-01Henrik Grubbström (Grubba) # # <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net"> # From Evelyn C. Leeper via Mark Brader (2003-10-26):</a> # 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 (2006-03-22): # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
c0dbee2000-08-01Mirar (Pontus Hagland) # 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 -
84701a2007-02-01Henrik Grubbström (Grubba) Rule Peru 1986 1987 - Jan 1 0:00 1:00 S Rule Peru 1986 1987 - Apr 1 0:00 0 -
c0dbee2000-08-01Mirar (Pontus Hagland) Rule Peru 1990 only - Jan 1 0:00 1:00 S Rule Peru 1990 only - Apr 1 0:00 0 -
84701a2007-02-01Henrik Grubbström (Grubba) # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
c0dbee2000-08-01Mirar (Pontus Hagland) 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
84701a2007-02-01Henrik Grubbström (Grubba) # From Paul Eggert (1993-11-18):
c0dbee2000-08-01Mirar (Pontus Hagland) # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
84701a2007-02-01Henrik Grubbström (Grubba) # From Shanks & Pottenger:
c0dbee2000-08-01Mirar (Pontus Hagland) # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
84701a2007-02-01Henrik Grubbström (Grubba) # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
c0dbee2000-08-01Mirar (Pontus Hagland) 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
84701a2007-02-01Henrik Grubbström (Grubba) # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
c0dbee2000-08-01Mirar (Pontus Hagland) 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 -
84701a2007-02-01Henrik Grubbström (Grubba) # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
c0dbee2000-08-01Mirar (Pontus Hagland) 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,
84701a2007-02-01Henrik Grubbström (Grubba) # and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger. Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS Rule Uruguay 1942 only - Jan 1 0:00 0 -
c0dbee2000-08-01Mirar (Pontus Hagland) 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
84701a2007-02-01Henrik Grubbström (Grubba) # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
c0dbee2000-08-01Mirar (Pontus Hagland) # 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 -
84701a2007-02-01Henrik Grubbström (Grubba) # 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 19 0:00 1:00 S # From Steffen Thorsen (2005-03-11): # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to # save energy ... it was postponed two weeks.... # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm Rule Uruguay 2005 only - Mar 27 2:00 0 - # From Eduardo Cota (2005-09-27): # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at # 02:00 local time, official time in Uruguay will be at GMT -2. Rule Uruguay 2005 only - Oct 9 2:00 1:00 S Rule Uruguay 2006 only - Mar 12 2:00 0 - # From Jesper Norgaard Welen (2006-09-06): # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
c0dbee2000-08-01Mirar (Pontus Hagland) # 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
ca883b2008-04-03Henrik Grubbström (Grubba) # # From John Stainforth (2007-11-28): # ... the change for Venezuela originally expected for 2007-12-31 has # been brought forward to 2007-12-09. The official announcement was # published today in the "Gaceta Oficial de la Republica Bolivariana # de Venezuela, numero 38.819" (official document for all laws or # resolution publication) # http://www.globovision.com/news.php?nid=72208
c0dbee2000-08-01Mirar (Pontus Hagland) # 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
ca883b2008-04-03Henrik Grubbström (Grubba)  -4:00 - VET 2007 Dec 9 03:00 -4:30 - VET