southamerica revision 5672538156e1a508f11e549253657a3efd68bc79
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski#ident "%Z%%M% %I% %E% SMI"
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# @(#)southamerica 8.26
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# This data is by no means authoritative; if you think you know better,
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# go ahead and edit the file (and please send any changes to
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# tz@elsie.nci.nih.gov for general use in the future).
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Paul Eggert (2006-03-22):
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# A good source for time zone historical data outside the U.S. is
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# San Diego: ACS Publications, Inc. (2003).
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Gwillim Law writes that a good source
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# for recent time zone data is the International Air Transport
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# Association's Standard Schedules Information Manual (IATA SSIM),
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# published semiannually. Law sent in several helpful summaries
999f839e42d594e4ae288208fec398626837c41cTill Mossakowski# of the IATA's data after 1990.
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Except where otherwise noted, Shanks & Pottenger is the source for
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# entries through 1990, and IATA SSIM is the source for entries afterwards.
337edd3ede3445e5f03090c1e9b6739376d37e1eTill Mossakowski# Earlier editions of these tables used the North American style (e.g. ARST and
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# ARDT for Argentine Standard and Daylight Time), but the following quote
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# suggests that it's better to use European style (e.g. ART and ARST).
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# I suggest the use of _Summer time_ instead of the more cumbersome
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# _daylight-saving time_. _Summer time_ seems to be in general use
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# in Europe and South America.
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# -- E O Cutler, _New York Times_ (1937-02-14), quoted in
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# H L Mencken, _The American Language: Supplement I_ (1960), p 466
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Earlier editions of these tables also used the North American style
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# for time zones in Brazil, but this was incorrect, as Brazilians say
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# the railroad sector, writes (1999-07-06):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# The subject of time zones is currently a matter of discussion/debate in
f153609d4ff5616d7caa410df605afcdfb9956dfChristian Maeder# Brazil. Let's say that "the Brasilia time" is considered the
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# "official time" because Brasilia is the capital city.
9b01b265715d725c17d51619d297bbb97f37d1b5Thiemo Wiedemeyer# The other three time zones are called "Brasilia time "minus one" or
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# "plus one" or "plus two". As far as I know there is no such
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# name/designation as "Eastern Time" or "Central Time".
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# So I invented the following (English-language) abbreviations for now.
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Corrections are welcome!
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# -2:00 FNT FNST Fernando de Noronha
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# -3:00 BRT BRST Brasilia
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# -4:00 AMT AMST Amazon
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# -5:00 ACT ACST Acre
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski###############################################################################
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski###############################################################################
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Bob Devine (1988-01-28):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Argentina: first Sunday in October to first Sunday in April since 1976.
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Double Summer time from 1969 to 1974. Switches at midnight.
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From U. S. Naval Observatory (1988-01-199):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# ARGENTINA 3 H BEHIND UTC
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Hernan G. Otero (1995-06-26):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# I am sending modifications to the Argentine time zone table...
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# AR was chosen because they are the ISO letters that represent Argentina.
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill MossakowskiRule Arg 1930 only - Dec 1 0:00 1:00 S
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill MossakowskiRule Arg 1931 only - Apr 1 0:00 0 -
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till MossakowskiRule Arg 1931 only - Oct 15 0:00 1:00 S
9b01b265715d725c17d51619d297bbb97f37d1b5Thiemo WiedemeyerRule Arg 1932 1940 - Mar 1 0:00 0 -
9b01b265715d725c17d51619d297bbb97f37d1b5Thiemo WiedemeyerRule Arg 1932 1939 - Nov 1 0:00 1:00 S
9b01b265715d725c17d51619d297bbb97f37d1b5Thiemo WiedemeyerRule Arg 1940 only - Jul 1 0:00 1:00 S
9b01b265715d725c17d51619d297bbb97f37d1b5Thiemo WiedemeyerRule Arg 1941 only - Jun 15 0:00 0 -
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1941 only - Oct 15 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1943 only - Aug 1 0:00 0 -
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1943 only - Oct 15 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1946 only - Mar 1 0:00 0 -
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1946 only - Oct 1 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1963 only - Oct 1 0:00 0 -
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1963 only - Dec 15 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1964 1966 - Mar 1 0:00 0 -
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1964 1966 - Oct 15 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1967 only - Apr 2 0:00 0 -
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1974 only - Jan 23 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1974 only - May 1 0:00 0 -
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1988 only - Dec 1 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Hernan G. Otero (1995-06-26):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# These corrections were contributed by InterSoft Argentina S.A.,
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# obtaining the data from the:
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Talleres de Hidrografia Naval Argentina
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# (Argentine Naval Hydrography Institute)
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Hernan G. Otero (1995-06-26):
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# From this moment on, the law that mandated the daylight saving
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# time corrections was derogated and no more modifications
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# to the time zones (for daylight saving) are now made.
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# From Rives McDow (2000-01-10):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# which did not result in the switch of a time zone, as they stayed 9 hours
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# from the International Date Line.
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiRule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Paul Eggert (2007-12-28):
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# DST was set to expire on March 5, not March 3, but since it was converted
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# to standard time on March 3 it's more convenient for us to pretend that
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# it ended on March 3.
ad69cb3627839ed3d33f13d71c81378b65a24b35Till MossakowskiRule Arg 2000 only - Mar 3 0:00 0 -
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# From Peter Gradelski via Steffen Thorsen (2000-03-01):
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# We just checked with our Sao Paulo office and they say the government of
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# Argentina decided not to become one of the countries that go on or off DST.
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# So Buenos Aires should be -3 hours from GMT at all times.
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# From Fabian L. Arce Jofre (2000-04-04):
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# The law that claimed DST for Argentina was derogated by President Fernando
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# de la Rua on March 2, 2000, because it would make people spend more energy
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# in the winter time, rather than less. The change took effect on March 3.
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# From Mariano Absatz (2001-06-06):
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# one of the major newspapers here in Argentina said that the 1999
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# Timezone Law (which never was effectively applied) will (would?) be
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# in effect.... The article is at
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# 1999-09-17, and published 1999-09-21. The official publication is at:
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# Regretfully, you have to subscribe (and pay) for the on-line version....
9a80079e082fdf4fe8e19f8fc61e6cd8799b47a7Christian Maeder# (2001-06-12):
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# the timezone for Argentina will not change next Sunday.
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# Apparently it will do so on Sunday 24th....
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# (2001-06-25):
9a80079e082fdf4fe8e19f8fc61e6cd8799b47a7Christian Maeder# Last Friday (yes, the last working day before the date of the change), the
9a80079e082fdf4fe8e19f8fc61e6cd8799b47a7Christian Maeder# Senate annulled the 1999 law that introduced the changes later postponed.
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
9a80079e082fdf4fe8e19f8fc61e6cd8799b47a7Christian Maeder# It remains the vote of the Deputies..., but it will be the same....
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# This kind of things had always been done this way in Argentina.
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# We are still -03:00 all year round in all of the country.
9a80079e082fdf4fe8e19f8fc61e6cd8799b47a7Christian Maeder# From Steffen Thorsen (2007-12-21):
0fdd7e2481e93a2b540617f0a24c4ee206a35e1cTill Mossakowski# A user (Leonardo Chaim) reported that Argentina will adopt DST....
0fdd7e2481e93a2b540617f0a24c4ee206a35e1cTill Mossakowski# all of the country (all Zone-entries) are affected. News reports like
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# that Argentina will use DST next year as well, from October to
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# March, although exact rules are not given.
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# From Jesper Norgaard Welen (2007-12-26)
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# The last hurdle of Argentina DST is over, the proposal was approved in
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# the lower chamber too (Deputados) with a vote 192 for and 2 against.
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# the original scanned proposal, where the dates and the zero hours are
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# clear and unambiguous...This is the article about final approval:
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Paul Eggert (2007-12-22):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# For dates after mid-2008, the following rules are my guesses and
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# are quite possibly wrong, but are more likely than no DST at all.
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill MossakowskiRule Arg 2007 only - Dec 30 0:00 1:00 S
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill MossakowskiRule Arg 2008 max - Mar Sun>=15 0:00 0 -
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill MossakowskiRule Arg 2008 max - Oct Sun>=1 0:00 1:00 S
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Mariano Absatz (2004-05-21):
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Today it was officially published that the Province of Mendoza is changing
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# its timezone this winter... starting tomorrow night....
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Paul Eggert (2004-05-24):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# It's Law No. 7,210. This change is due to a public power emergency, so for
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# now we'll assume it's for this year only.
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# From Paul Eggert (2006-03-22):
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# <a href="http://www.spicasc.net/horvera.html">
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Hora de verano para la Republica Argentina (2003-06-08)
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# </a> says that standard time in Argentina from 1894-10-31
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# over Shanks & Pottenger.
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Mariano Absatz (2004-06-05):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# These media articles from a major newspaper mostly cover the current state:
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# http://www.lanacion.com.ar/04/05/27/de_604825.asp
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# http://www.lanacion.com.ar/04/05/28/de_605203.asp
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# The following eight (8) provinces pulled clocks back to UTC-04:00 at
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Apparently, all nine provinces would go back to UTC-03:00 at the same
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# time in October 17th.
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# Tierra del Fuego, Tucuman.
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# From Mariano Absatz (2004-06-14):
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# annoyance with the change is much higher than the power savings obtained....
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# From Gwillim Law (2004-06-14):
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# "The time change in Tierra del Fuego was a conflicted decision from
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# the start. The government had decreed that the measure would take
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# effect on June 1, but a normative error forced the new time to begin
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# three days earlier, from a Saturday to a Sunday....
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Our understanding was that the change was originally scheduled to take place
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# provinces). Sunday was May 30, only two days earlier. So the article
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# contains a contradiction. I would give more credence to the Saturday/Sunday
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# date than the "three days earlier" phrase, and conclude that Tierra del
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Fuego set its clocks back at 2004-05-30 00:00.
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# From Steffen Thorsen (2004-10-05):
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# The previous law 7210 which changed the province of Mendoza's time zone
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# back in May have been modified slightly in a new law 7277, which set the
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# new end date to 2004-09-26 (original date was 2004-10-17).
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# From Mariano Absatz (2004-10-05):
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# at midnight between Saturday, July 24th and Sunday, July 25th....
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Alex Krivenyshev (2008-01-17):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Here are articles that Argentina Province San Luis is planning to end DST
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# as earlier as upcoming Monday January 21, 2008 or February 2008:
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Provincia argentina retrasa reloj y marca diferencia con resto del pais
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# (Argentine Province delayed clock and mark difference with the rest of the
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
f094a7999dfa79cad2eb34ce15f1939c0d6b9e39Till Mossakowski# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Es inminente que en San Luis atrasen una hora los relojes
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# (It is imminent in San Luis clocks one hour delay)
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder# From Jesper Norgaard Welen (2008-01-18):
e45f00ee89d20991a57651931b13f0637762bcd1Till Mossakowski# The page of the San Luis provincial government
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# confirms what Alex Krivenyshev has earlier sent to the tz
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# emailing list about that San Luis plans to return to standard
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# time much earlier than the rest of the country. It also
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# confirms that upon request the provinces San Juan and Mendoza
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# refused to follow San Luis in this change.
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# The change is supposed to take place Monday the 21.st at 0:00
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# hours. As far as I understand it if this goes ahead, we need
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# a new timezone for San Luis (although there are also documented
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# independent changes in the southamerica file of San Luis in
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# 1990 and 1991 which has not been confirmed).
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# From Jesper Norgaard Welen (2008-01-25):
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# Unfortunately the below page has become defunct, about the San Luis
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# time change. Perhaps because it now is part of a group of pages "Most
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# important pages of 2008."
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# instead it seems. Or use "Buscador" from the main page of the San Luis
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# government, and fill in "huso" and click OK, and you will get 3 pages
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# from which the first one is identical to the above.
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# From Mariano Absatz (2008-01-28):
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# I can confirm that the Province of San Luis (and so far only that
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# province) decided to go back to UTC-3 effective midnight Jan 20th 2008
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# (that is, Monday 21st at 0:00 is the time the clocks were delayed back
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# 1 hour), and they intend to keep UTC-3 as their timezone all year round
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# (that is, unless they change their mind any minute now).
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# So we'll have to add yet another city to 'southamerica' (I think San
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Luis city is the mos populated city in the Province, so it'd be
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# America/Argentina/San_Luis... of course I can't remember if San Luis's
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# history of particular changes goes along with Mendoza or San Juan :-(
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# (I only remember not being able to collect hard facts about San Luis
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# back in 2004, when these provinces changed to UTC-4 for a few days, I
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# mailed them personally and never got an answer).
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# From Paul Eggert (2008-06-30):
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Unless otherwise specified, data are from Shanks & Pottenger through 1992,
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# from the IATA otherwise. As noted below, Shanks & Pottenger say that
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# America/Cordoba split into 6 subregions during 1991/1992, one of which
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder# was America/San_Luis, but we haven't verified this yet so for now we'll
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder# keep America/Cordoba a single region rather than splitting it into the
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder# other 5 subregions.
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder# Zone NAME GMTOFF RULES FORMAT [UNTIL]
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Buenos Aires (BA), Capital Federal (CF),
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiZone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:16:48 - CMT 1920 May # Cordoba Mean Time
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - ART 1930 Dec
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 Arg AR%sT 1969 Oct 5
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT 1999 Oct 3
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -4:00 Arg AR%sT 2000 Mar 3
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -3:00 Arg AR%sT
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB),
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Shanks & Pottenger also make the following claims, which we haven't verified:
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# - Formosa switched to -3:00 on 1991-01-07.
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# - Misiones switched to -3:00 on 1990-12-29.
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# - Chaco switched to -3:00 on 1991-01-04.
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder# - Santiago del Estero switched to -4:00 on 1991-04-01,
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder# then to -3:00 on 1991-04-26.
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian MaederZone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:16:48 - CMT 1920 May
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - ART 1930 Dec
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 Arg AR%sT 1969 Oct 5
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -3:00 Arg AR%sT 1991 Mar 3
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -4:00 - WART 1991 Oct 20
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -3:00 Arg AR%sT 1999 Oct 3
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -4:00 Arg AR%sT 2000 Mar 3
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT
e45f00ee89d20991a57651931b13f0637762bcd1Till Mossakowski# Tucuman (TM)
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiZone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder -4:16:48 - CMT 1920 May
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - ART 1930 Dec
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 Arg AR%sT 1969 Oct 5
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT 1991 Mar 3
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - WART 1991 Oct 20
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT 1999 Oct 3
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 Arg AR%sT 2000 Mar 3
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 - ART 2004 Jun 1
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - WART 2004 Jun 13
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# La Rioja (LR)
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiZone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:16:48 - CMT 1920 May
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - ART 1930 Dec
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 Arg AR%sT 1969 Oct 5
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT 1991 Mar 1
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - WART 1991 May 7
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT 1999 Oct 3
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski -4:00 Arg AR%sT 2000 Mar 3
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder -3:00 - ART 2004 Jun 1
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski -4:00 - WART 2004 Jun 20
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski -3:00 Arg AR%sT
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder# San Juan (SJ)
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian MaederZone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:16:48 - CMT 1920 May
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - ART 1930 Dec
e45f00ee89d20991a57651931b13f0637762bcd1Till Mossakowski -4:00 Arg AR%sT 1969 Oct 5
9a80079e082fdf4fe8e19f8fc61e6cd8799b47a7Christian Maeder -3:00 Arg AR%sT 1991 Mar 1
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski -4:00 - WART 1991 May 7
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski -3:00 Arg AR%sT 1999 Oct 3
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski -4:00 Arg AR%sT 2000 Mar 3
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski -3:00 - ART 2004 May 31
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - WART 2004 Jul 25
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder -3:00 Arg AR%sT
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill MossakowskiZone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder -4:16:48 - CMT 1920 May
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - ART 1930 Dec
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder -4:00 Arg AR%sT 1969 Oct 5
ad69cb3627839ed3d33f13d71c81378b65a24b35Till Mossakowski -3:00 Arg AR%sT 1990 Mar 4
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - WART 1990 Oct 28
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 1:00 WARST 1991 Mar 17
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - WART 1991 Oct 6
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 1:00 ARST 1992
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -3:00 Arg AR%sT 1999 Oct 3
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 Arg AR%sT 2000 Mar 3
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# Catamarca (CT), Chubut (CH)
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till MossakowskiZone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:16:48 - CMT 1920 May
0fdd7e2481e93a2b540617f0a24c4ee206a35e1cTill Mossakowski -4:00 - ART 1930 Dec
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 Arg AR%sT 1969 Oct 5
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT 1991 Mar 3
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - WART 1991 Oct 20
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -3:00 Arg AR%sT 1999 Oct 3
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -4:00 Arg AR%sT 2000 Mar 3
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -3:00 - ART 2004 Jun 1
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -4:00 - WART 2004 Jun 20
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -3:00 Arg AR%sT
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder# Mendoza (MZ)
0fdd7e2481e93a2b540617f0a24c4ee206a35e1cTill MossakowskiZone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
0fdd7e2481e93a2b540617f0a24c4ee206a35e1cTill Mossakowski -4:16:48 - CMT 1920 May
0fdd7e2481e93a2b540617f0a24c4ee206a35e1cTill Mossakowski -4:00 - ART 1930 Dec
0fdd7e2481e93a2b540617f0a24c4ee206a35e1cTill Mossakowski -4:00 Arg AR%sT 1969 Oct 5
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT 1990 Mar 4
3a6decfd748f532d5cb03fbcb7a42fa37b0faab3Christian Maeder -4:00 - WART 1990 Oct 15
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 1:00 WARST 1991 Mar 1
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder -4:00 - WART 1991 Oct 15
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 1:00 WARST 1992 Mar 1
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - WART 1992 Oct 18
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT 1999 Oct 3
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 Arg AR%sT 2000 Mar 3
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 - ART 2004 May 23
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski -4:00 - WART 2004 Sep 26
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 Arg AR%sT
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski# San Luis (SL)
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till MossakowskiZone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:16:48 - CMT 1920 May
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 - ART 1930 Dec
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -4:00 Arg AR%sT 1969 Oct 5
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski -3:00 Arg AR%sT 1990
c46bd51db9d35bed0f8f83d3d1db78238bd89ae8Till Mossakowski -3:00 1:00 ARST 1990 Mar 14
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:00 - WART 1990 Oct 15
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:00 1:00 WARST 1991 Mar 1
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:00 - WART 1991 Jun 1
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -3:00 - ART 1999 Oct 3
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:00 1:00 WARST 2000 Mar 3
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -3:00 - ART 2004 May 31
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:00 - WART 2004 Jul 25
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -3:00 Arg AR%sT 2008 Jan 21
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Santa Cruz (SC)
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill MossakowskiZone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:16:48 - CMT 1920 May # Cordoba Mean Time
54ea981a0503c396c2923a1c06421c6235baf27fChristian Maeder -4:00 - ART 1930 Dec
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:00 Arg AR%sT 1969 Oct 5
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -3:00 Arg AR%sT 1999 Oct 3
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:00 Arg AR%sT 2000 Mar 3
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -3:00 - ART 2004 Jun 1
83e814d7ac048930de2fe34b5b23d883654a1777Christian Maeder -4:00 - WART 2004 Jun 20
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -3:00 Arg AR%sT
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till MossakowskiZone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:16:48 - CMT 1920 May # Cordoba Mean Time
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski -4:00 - ART 1930 Dec
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski -4:00 Arg AR%sT 1969 Oct 5
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder -3:00 Arg AR%sT 1999 Oct 3
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:00 Arg AR%sT 2000 Mar 3
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -3:00 - ART 2004 May 30
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:00 - WART 2004 Jun 20
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder -3:00 Arg AR%sT
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Zone NAME GMTOFF RULES FORMAT [UNTIL]
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill MossakowskiZone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:30 - ANT 1965 # Netherlands Antilles Time
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Zone NAME GMTOFF RULES FORMAT [UNTIL]
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill MossakowskiZone America/La_Paz -4:32:36 - LMT 1890
433bb7cb49200f4e6c7341101da25309e423c0e2Christian Maeder -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski -4:00 - BOT # Bolivia Time
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# From Paul Eggert (1993-11-18):
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# The mayor of Rio recently attempted to change the time zone rules
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# just in his city, in order to leave more summer time for the tourist trade.
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# The rule change lasted only part of the day;
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# the federal government refused to follow the city's rules, and business
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# was in a chaos, so the mayor backed down that afternoon.
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# From IATA SSIM (1996-02):
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
93dfeb7d82cf7d67776b0e7492bbe7e48af172a5Till Mossakowski# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# [The last three states are new to this issue of the IATA SSIM.]
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# From Gwillim Law (1996-10-07):
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Geography, history (Tocantins was part of Goias until 1989), and other
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# sources of time zone information lead me to believe that AL, SE, and TO were
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# always in BR1, and so the only change was whether or not they observed DST....
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# The earliest issue of the SSIM I have is 2/91. Each issue from then until
6997fba88bad2067bbe9d1d09e9766dd061ec846Till Mossakowski# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# (UTC-4).... The other two time zones given for Brazil are BR3, which is
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# become part of the state of Pernambuco). The boundary between BR1 and BR2
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# has never been clearly stated. They've simply been called East and West.
54ea981a0503c396c2923a1c06421c6235baf27fChristian Maeder# However, some conclusions can be drawn from another IATA manual: the Airline
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# Coding Directory, which lists close to 400 airports in Brazil. For each
fe1771bb2ad4ad758a5654b277c1bb145d46701cTill Mossakowski# airport it gives a time zone which is coded to the SSIM. From that
# <a href="http://pcdsh01.on.br/verao1.html">
# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
# ...by law number 11.662 of April 24, 2008 (published in the "Diario
# <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=3Ddo&secao=3D1&pagina=3D1&data=3D25/04/2008">
# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=3Ddo&secao=3D1&pagina=3D1&data=3D25/04/2008
# As a result of the above Decree I believe the America/Rio_Branco
# important/populated city in the affected area.
# <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
# (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
# <a href="http://pcdsh01.on.br/DecHV.html">
# 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)
# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
# 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)
# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
# Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
# Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
Zone America/Noronha -2:09:40 - LMT 1914
Zone America/Belem -3:13:56 - LMT 1914
Zone America/Santarem -3:38:48 - LMT 1914
Zone America/Fortaleza -2:34:00 - LMT 1914
Zone America/Recife -2:19:36 - LMT 1914
Zone America/Araguaina -3:12:48 - LMT 1914
Zone America/Maceio -2:22:52 - LMT 1914
# There are too many Salvadors elsewhere, so use America/Bahia instead
# of America/Salvador.
Zone America/Bahia -2:34:04 - LMT 1914
Zone America/Sao_Paulo -3:06:28 - LMT 1914
Zone America/Campo_Grande -3:38:28 - LMT 1914
Zone America/Cuiaba -3:44:20 - LMT 1914
Zone America/Porto_Velho -4:15:36 - LMT 1914
Zone America/Boa_Vista -4:02:40 - LMT 1914
Zone America/Manaus -4:00:04 - LMT 1914
Zone America/Eirunepe -4:39:28 - LMT 1914
Zone America/Rio_Branco -4:31:12 - LMT 1914
# 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
# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
# and Saturday 3/29 at 22:00 for Pacific/Easter)
# <a href="http://www.shoa.cl/servicios/supremo316.pdf">
# <a href="http://www.horaoficial.cl/cambio.htm">
# <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
# N.B.: the end of March 29 in Chile is March 30 in Universal time,
Zone America/Santiago -4:42:46 - LMT 1890
Zone Pacific/Easter -7:17:44 - LMT 1890
# Sala y Gomez Island is like Pacific/Easter.
# San Felix, and Antarctic bases, are like America/Santiago.
Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
# no information; probably like America/Bogota
Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
# <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
Zone America/Guayaquil -5:19:20 - LMT 1890
Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
Zone Atlantic/Stanley -3:51:24 - LMT 1890
Zone America/Cayenne -3:29:20 - LMT 1911 Jul
Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
Zone America/Asuncion -3:50:40 - LMT 1890
Zone America/Lima -5:08:12 - LMT 1890
Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
Zone America/Paramaribo -3:40:40 - LMT 1911
Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
Zone America/Caracas -4:27:44 - LMT 1890