# 

# @(#)southamerica	8.36

# This file is in the public domain, so clarified as of

# 2009-05-17 by Arthur David Olson.

# This data is by no means authoritative; if you think you know better,

# go ahead and edit the file (and please send any changes to

# tz@elsie.nci.nih.gov for general use in the future).

# From Paul Eggert (2006-03-22):

# A good source for time zone historical data outside the U.S. is

# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),

# San Diego: ACS Publications, Inc. (2003).

#

# Gwillim Law writes that a good source

# for recent time zone data is the International Air Transport

# Association's Standard Schedules Information Manual (IATA SSIM),

# published semiannually.  Law sent in several helpful summaries

# of the IATA's data after 1990.

#

# Except where otherwise noted, Shanks & Pottenger is the source for

# entries through 1990, and IATA SSIM is the source for entries afterwards.

#

# Earlier editions of these tables used the North American style (e.g. ARST and

# ARDT for Argentine Standard and Daylight Time), but the following quote

# suggests that it's better to use European style (e.g. ART and ARST).

#	I suggest the use of _Summer time_ instead of the more cumbersome

#	_daylight-saving time_.  _Summer time_ seems to be in general use

#	in Europe and South America.

#	-- E O Cutler, _New York Times_ (1937-02-14), quoted in

#	H L Mencken, _The American Language: Supplement I_ (1960), p 466

#

# Earlier editions of these tables also used the North American style

# for time zones in Brazil, but this was incorrect, as Brazilians say

# "summer time".  Reinaldo Goulart, a Sao Paulo businessman active in

# the railroad sector, writes (1999-07-06):

#	The subject of time zones is currently a matter of discussion/debate in

#	Brazil.  Let's say that "the Brasilia time" is considered the

#	"official time" because Brasilia is the capital city.

#	The other three time zones are called "Brasilia time "minus one" or

#	"plus one" or "plus two".  As far as I know there is no such

#	name/designation as "Eastern Time" or "Central Time".

# So I invented the following (English-language) abbreviations for now.

# Corrections are welcome!

#		std	dst

#	-2:00	FNT	FNST	Fernando de Noronha

#	-3:00	BRT	BRST	Brasilia

#	-4:00	AMT	AMST	Amazon

#	-5:00	ACT	ACST	Acre

###############################################################################

###############################################################################

# Argentina

# From Bob Devine (1988-01-28):

# Argentina: first Sunday in October to first Sunday in April since 1976.

# Double Summer time from 1969 to 1974.  Switches at midnight.

# From U. S. Naval Observatory (1988-01-199):

# ARGENTINA           3 H BEHIND   UTC

# From Hernan G. Otero (1995-06-26):

# I am sending modifications to the Argentine time zone table...

# AR was chosen because they are the ISO letters that represent Argentina.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S

Rule	Arg	1930	only	-	Dec	 1	0:00	1:00	S

Rule	Arg	1931	only	-	Apr	 1	0:00	0	-

Rule	Arg	1931	only	-	Oct	15	0:00	1:00	S

Rule	Arg	1932	1940	-	Mar	 1	0:00	0	-

Rule	Arg	1932	1939	-	Nov	 1	0:00	1:00	S

Rule	Arg	1940	only	-	Jul	 1	0:00	1:00	S

Rule	Arg	1941	only	-	Jun	15	0:00	0	-

Rule	Arg	1941	only	-	Oct	15	0:00	1:00	S

Rule	Arg	1943	only	-	Aug	 1	0:00	0	-

Rule	Arg	1943	only	-	Oct	15	0:00	1:00	S

Rule	Arg	1946	only	-	Mar	 1	0:00	0	-

Rule	Arg	1946	only	-	Oct	 1	0:00	1:00	S

Rule	Arg	1963	only	-	Oct	 1	0:00	0	-

Rule	Arg	1963	only	-	Dec	15	0:00	1:00	S

Rule	Arg	1964	1966	-	Mar	 1	0:00	0	-

Rule	Arg	1964	1966	-	Oct	15	0:00	1:00	S

Rule	Arg	1967	only	-	Apr	 2	0:00	0	-

Rule	Arg	1967	1968	-	Oct	Sun>=1	0:00	1:00	S

Rule	Arg	1968	1969	-	Apr	Sun>=1	0:00	0	-

Rule	Arg	1974	only	-	Jan	23	0:00	1:00	S

Rule	Arg	1974	only	-	May	 1	0:00	0	-

Rule	Arg	1988	only	-	Dec	 1	0:00	1:00	S

#

# From Hernan G. Otero (1995-06-26):

# These corrections were contributed by InterSoft Argentina S.A.,

# obtaining the data from the:

# Talleres de Hidrografia Naval Argentina

# (Argentine Naval Hydrography Institute)

Rule	Arg	1989	1993	-	Mar	Sun>=1	0:00	0	-

Rule	Arg	1989	1992	-	Oct	Sun>=15	0:00	1:00	S

#

# From Hernan G. Otero (1995-06-26):

# From this moment on, the law that mandated the daylight saving

# time corrections was derogated and no more modifications

# to the time zones (for daylight saving) are now made.

#

# From Rives McDow (2000-01-10):

# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,

# which did not result in the switch of a time zone, as they stayed 9 hours

# from the International Date Line.

Rule	Arg	1999	only	-	Oct	Sun>=1	0:00	1:00	S

# 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	-

#

# From Peter Gradelski via Steffen Thorsen (2000-03-01):

# We just checked with our Sao Paulo office and they say the government of

# Argentina decided not to become one of the countries that go on or off DST.

# So Buenos Aires should be -3 hours from GMT at all times.

#

# From Fabian L. Arce Jofre (2000-04-04):

# The law that claimed DST for Argentina was derogated by President Fernando

# de la Rua on March 2, 2000, because it would make people spend more energy

# in the winter time, rather than less.  The change took effect on March 3.

#

# From Mariano Absatz (2001-06-06):

# one of the major newspapers here in Argentina said that the 1999

# Timezone Law (which never was effectively applied) will (would?) be

# in effect.... The article is at

# http://ar.clarin.com/diario/2001-06-06/e-01701.htm

# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted

# 1999-09-17, and published 1999-09-21.  The official publication is at:

# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF

# Regretfully, you have to subscribe (and pay) for the on-line version....

#

# (2001-06-12):

# the timezone for Argentina will not change next Sunday.

# Apparently it will do so on Sunday 24th....

# http://ar.clarin.com/diario/2001-06-12/s-03501.htm

#

# (2001-06-25):

# Last Friday (yes, the last working day before the date of the change), the

# Senate annulled the 1999 law that introduced the changes later postponed.

# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm

# It remains the vote of the Deputies..., but it will be the same....

# This kind of things had always been done this way in Argentina.

# We are still -03:00 all year round in all of the country.

#

# From 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:

# 

# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996

# 

#

# 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.

# From Alexander Krivenyshev (2008-09-05):

# As per message from Carlos Alberto Fonseca Arauz (Nicaragua),

# Argentina will start DST on Sunday October 19, 2008.

#

# 

# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html

# 

# OR

# 

# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)

# 

# 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.

# 

# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm

# 

# The new one is law [Number] 26.350

# 

# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm

# 

# 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

# 

# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01

# 

#

# 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

# 

# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01

# 

#

# 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)

# 

# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc

# 

Rule	Arg	2007	only	-	Dec	30	0:00	1:00	S

Rule	Arg	2008	max	-	Mar	Sun>=15	0:00	0	-

Rule	Arg	2008	max	-	Oct	Sun>=15	0:00	1:00	S

# From Mariano Absatz (2004-05-21):

# Today it was officially published that the Province of Mendoza is changing

# its timezone this winter... starting tomorrow night....

# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf

# From Paul Eggert (2004-05-24):

# It's Law No. 7,210.  This change is due to a public power emergency, so for

# now we'll assume it's for this year only.

#

# From Paul Eggert (2006-03-22):

# 

# Hora de verano para la Republica Argentina (2003-06-08)

#  says that standard time in Argentina from 1894-10-31

# to 1920-05-01 was -4:16:48.25.  Go with this more-precise value

# over Shanks & 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

# 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)

# 

# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel

# 

#

# Es inminente que en San Luis atrasen una hora los relojes

# (It is imminent in San Luis clocks one hour delay)

# 

# http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414

# 

#

# 

# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html

# 

# From Jesper Norgaard Welen (2008-01-18):

# The page of the San Luis provincial government

# 

# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812

# 

# 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

# confirms that upon request the provinces San Juan and Mendoza 

# refused to follow San Luis in this change. 

# 

# 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

# 

# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834

# 

# 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):

# Unless otherwise specified, data are from Shanks & Pottenger through 1992,

# from the IATA otherwise.  As noted below, Shanks & Pottenger say that

# 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.

# 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

# 

# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102

# 

# (I couldn't find the decree, but

# 

# www.sanluis.gov.ar

# 

# is the official page for the Province Government).

#

# There's also a note in only one of the major national papers (La Nación) at

# 

# http://www.lanacion.com.ar/nota.asp?nota_id=1107912

# 

# 

# The press release says:

#  (...) anunció que el próximo domingo a las 00:00 los puntanos deberán

# atrasar una hora sus relojes.

#

# A partir de entonces, San Luis establecerá el huso horario propio de

# la Provincia. De esta manera, durante el periodo del calendario anual

# 2009, el cambio horario quedará comprendido entre las 00:00 del tercer

# domingo de marzo y las 24:00 del segundo sábado de octubre.

# Quick&dirty translation

# (...) announced that next Sunday, at 00:00, Puntanos (the San Luis

# 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.

# From Arthur David Olson (2009-03-16):

# The unofficial claim at

# 

# http://www.timeanddate.com/news/time/san-luis-new-time-zone.html

# 

# is that "The province will most likely follow the next daylight saving schedule,

# which is planned for the second Sunday in October."

#

# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]

#

# Buenos Aires (BA), Capital Federal (CF),

Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31

			-4:16:48 -	CMT	1920 May # Cordoba Mean Time

			-4:00	-	ART	1930 Dec

			-4:00	Arg	AR%sT	1969 Oct  5

			-3:00	Arg	AR%sT	1999 Oct  3

			-4:00	Arg	AR%sT	2000 Mar  3

			-3:00	Arg	AR%sT

#

# Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN),

# Chaco (CC), Formosa (FM), Santiago del Estero (SE)

#

# Shanks & Pottenger also make the following claims, which we haven't verified:

# - Formosa switched to -3:00 on 1991-01-07.

# - Misiones switched to -3:00 on 1990-12-29.

# - Chaco switched to -3:00 on 1991-01-04.

# - Santiago del Estero switched to -4:00 on 1991-04-01,

#   then to -3:00 on 1991-04-26.

#

Zone America/Argentina/Cordoba -4:16:48 - LMT	1894 Oct 31

			-4:16:48 -	CMT	1920 May

			-4:00	-	ART	1930 Dec

			-4:00	Arg	AR%sT	1969 Oct  5

			-3:00	Arg	AR%sT	1991 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

#

# 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

#

# Tucuman (TM)

Zone America/Argentina/Tucuman -4:20:52 - LMT	1894 Oct 31

			-4:16:48 -	CMT	1920 May

			-4:00	-	ART	1930 Dec

			-4:00	Arg	AR%sT	1969 Oct  5

			-3:00	Arg	AR%sT	1991 Mar  3

			-4:00	-	WART	1991 Oct 20

			-3:00	Arg	AR%sT	1999 Oct  3

			-4:00	Arg	AR%sT	2000 Mar  3

			-3:00	-	ART	2004 Jun  1

			-4:00	-	WART	2004 Jun 13

			-3:00	Arg	AR%sT

#

# La Rioja (LR)

Zone America/Argentina/La_Rioja -4:27:24 - LMT	1894 Oct 31

			-4:16:48 -	CMT	1920 May

			-4:00	-	ART	1930 Dec

			-4:00	Arg	AR%sT	1969 Oct  5

			-3:00	Arg	AR%sT	1991 Mar  1

			-4:00	-	WART	1991 May  7

			-3:00	Arg	AR%sT	1999 Oct  3

			-4:00	Arg	AR%sT	2000 Mar  3

			-3:00	-	ART	2004 Jun  1

			-4:00	-	WART	2004 Jun 20

			-3:00	Arg	AR%sT	2008 Oct 18

			-3:00	-	ART

#

# San Juan (SJ)

Zone America/Argentina/San_Juan -4:34:04 - LMT	1894 Oct 31

			-4:16:48 -	CMT	1920 May

			-4:00	-	ART	1930 Dec

			-4:00	Arg	AR%sT	1969 Oct  5

			-3:00	Arg	AR%sT	1991 Mar  1

			-4:00	-	WART	1991 May  7

			-3:00	Arg	AR%sT	1999 Oct  3

			-4:00	Arg	AR%sT	2000 Mar  3

			-3:00	-	ART	2004 May 31

			-4:00	-	WART	2004 Jul 25

			-3:00	Arg	AR%sT	2008 Oct 18

			-3:00	-	ART

#

# Jujuy (JY)

Zone America/Argentina/Jujuy -4:21:12 -	LMT	1894 Oct 31

			-4:16:48 -	CMT	1920 May

			-4:00	-	ART	1930 Dec

			-4:00	Arg	AR%sT	1969 Oct  5

			-3:00	Arg	AR%sT	1990 Mar  4

			-4:00	-	WART	1990 Oct 28

			-4:00	1:00	WARST	1991 Mar 17

			-4:00	-	WART	1991 Oct  6

			-3:00	1:00	ARST	1992

			-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

#

# Catamarca (CT), Chubut (CH)

Zone America/Argentina/Catamarca -4:23:08 - LMT	1894 Oct 31

			-4:16:48 -	CMT	1920 May

			-4:00	-	ART	1930 Dec

			-4:00	Arg	AR%sT	1969 Oct  5

			-3:00	Arg	AR%sT	1991 Mar  3

			-4:00	-	WART	1991 Oct 20

			-3:00	Arg	AR%sT	1999 Oct  3

			-4:00	Arg	AR%sT	2000 Mar  3

			-3:00	-	ART	2004 Jun  1

			-4:00	-	WART	2004 Jun 20

			-3:00	Arg	AR%sT	2008 Oct 18

			-3:00	-	ART

#

# Mendoza (MZ)

Zone America/Argentina/Mendoza -4:35:16 - LMT	1894 Oct 31

			-4:16:48 -	CMT	1920 May

			-4:00	-	ART	1930 Dec

			-4:00	Arg	AR%sT	1969 Oct  5

			-3:00	Arg	AR%sT	1990 Mar  4

			-4:00	-	WART	1990 Oct 15

			-4:00	1:00	WARST	1991 Mar  1

			-4:00	-	WART	1991 Oct 15

			-4:00	1:00	WARST	1992 Mar  1

			-4:00	-	WART	1992 Oct 18

			-3:00	Arg	AR%sT	1999 Oct  3

			-4:00	Arg	AR%sT	2000 Mar  3

			-3:00	-	ART	2004 May 23

			-4:00	-	WART	2004 Sep 26

			-3:00	Arg	AR%sT	2008 Oct 18

			-3:00	-	ART

#

# San Luis (SL)

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

			-3:00	-	ART	2009 Mar 15

			-4:00	Arg	WAR%sT

#

# Santa Cruz (SC)

Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31

			-4:16:48 -	CMT	1920 May # Cordoba Mean Time

			-4:00	-	ART	1930 Dec

			-4:00	Arg	AR%sT	1969 Oct  5

			-3:00	Arg	AR%sT	1999 Oct  3

			-4:00	Arg	AR%sT	2000 Mar  3

			-3:00	-	ART	2004 Jun  1

			-4:00	-	WART	2004 Jun 20

			-3:00	Arg	AR%sT	2008 Oct 18

			-3:00	-	ART

#

# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)

Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31

			-4:16:48 -	CMT	1920 May # Cordoba Mean Time

			-4:00	-	ART	1930 Dec

			-4:00	Arg	AR%sT	1969 Oct  5

			-3:00	Arg	AR%sT	1999 Oct  3

			-4:00	Arg	AR%sT	2000 Mar  3

			-3:00	-	ART	2004 May 30

			-4:00	-	WART	2004 Jun 20

			-3:00	Arg	AR%sT	2008 Oct 18

			-3:00	-	ART

# Aruba

# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]

Zone	America/Aruba	-4:40:24 -	LMT	1912 Feb 12	# Oranjestad

			-4:30	-	ANT	1965 # Netherlands Antilles Time

			-4:00	-	AST

# Bolivia

# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]

Zone	America/La_Paz	-4:32:36 -	LMT	1890

			-4:32:36 -	CMT	1931 Oct 15 # Calamarca MT

			-4:32:36 1:00	BOST	1932 Mar 21 # Bolivia ST

			-4:00	-	BOT	# Bolivia Time

# Brazil

# From Paul Eggert (1993-11-18):

# The mayor of Rio recently attempted to change the time zone rules

# just in his city, in order to leave more summer time for the tourist trade.

# 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):

# 

# Brazilian official page

# 

# From Jesper Norgaard (2000-11-03):

# [For an official list of which regions in Brazil use which time zones, see:]

# http://pcdsh01.on.br/Fusbr.htm

# http://pcdsh01.on.br/Fusbrhv.htm

# From Celso Doria via David Madeo (2002-10-09):

# The reason for the delay this year has to do with elections in Brazil.

#

# Unlike in the United States, elections in Brazil are 100% computerized and

# the results are known almost immediately.  Yesterday, it was the first

# round of the elections when 115 million Brazilians voted for President,

# Governor, Senators, Federal Deputies, and State Deputies.  Nobody is

# counting (or re-counting) votes anymore and we know there will be a second

# round for the Presidency and also for some Governors.  The 2nd round will

# take place on October 27th.

#

# The reason why the DST will only begin November 3rd is that the thousands

# of electoral machines used cannot have their time changed, and since the

# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,

# the Government decided to postpone DST, instead of changing the Constitution

# (maybe, for the next elections, it will be possible to change the clock)...

# From Rodrigo Severo (2004-10-04):

# It's just the biannual change made necessary by the much hyped, supposedly

# modern Brazilian eletronic voting machines which, apparently, can't deal

# with a time change between the first and the second rounds of the elections.

# From 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

# 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:

# 

# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008

# 

#

# 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

# be created to represent the the west side of the Para State. I

# 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.

# 

# http://www.worldtimezone.com/brazil-time-new-old.php

# 

#

# - 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).

# From Paul Eggert (2002-10-10):

# The official decrees referenced below are mostly taken from

# 

# Decretos sobre o Horario de Verao no Brasil

# .

# 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:

# 

# http://www.mme.gov.br/site/news/detail.do?newsId=16722

# 

# Note that this link does not always work directly, but must be accessed

# by going to

# 

# http://www.mme.gov.br/first

# 

#

# One example link that works directly:

# 

# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54

# (Portuguese)

# 

#

# We have a written a short article about it as well:

# 

# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html

# 

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S

# Decree 20,466 (1931-10-01)

# Decree 21,896 (1932-01-10)

Rule	Brazil	1931	only	-	Oct	 3	11:00	1:00	S

Rule	Brazil	1932	1933	-	Apr	 1	 0:00	0	-

Rule	Brazil	1932	only	-	Oct	 3	 0:00	1:00	S

# Decree 23,195 (1933-10-10)

# revoked DST.

# Decree 27,496 (1949-11-24)

# Decree 27,998 (1950-04-13)

Rule	Brazil	1949	1952	-	Dec	 1	 0:00	1:00	S

Rule	Brazil	1950	only	-	Apr	16	 1:00	0	-

Rule	Brazil	1951	1952	-	Apr	 1	 0:00	0	-

# Decree 32,308 (1953-02-24)

Rule	Brazil	1953	only	-	Mar	 1	 0:00	0	-

# Decree 34,724 (1953-11-30)

# revoked DST.

# Decree 52,700 (1963-10-18)

# established DST from 1963-10-23 00:00 to 1964-02-29 00:00

# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.

# Decree 53,071 (1963-12-03)

# extended the above decree to all of the national territory on 12-09.

Rule	Brazil	1963	only	-	Dec	 9	 0:00	1:00	S

# Decree 53,604 (1964-02-25)

# extended summer time by one day to 1964-03-01 00:00 (start of school).

Rule	Brazil	1964	only	-	Mar	 1	 0:00	0	-

# Decree 55,639 (1965-01-27)

Rule	Brazil	1965	only	-	Jan	31	 0:00	1:00	S

Rule	Brazil	1965	only	-	Mar	31	 0:00	0	-

# Decree 57,303 (1965-11-22)

Rule	Brazil	1965	only	-	Dec	 1	 0:00	1:00	S

# Decree 57,843 (1966-02-18)

Rule	Brazil	1966	1968	-	Mar	 1	 0:00	0	-

Rule	Brazil	1966	1967	-	Nov	 1	 0:00	1:00	S

# Decree 63,429 (1968-10-15)

# revoked DST.

# Decree 91,698 (1985-09-27)

Rule	Brazil	1985	only	-	Nov	 2	 0:00	1:00	S

# Decree 92,310 (1986-01-21)

# Decree 92,463 (1986-03-13)

Rule	Brazil	1986	only	-	Mar	15	 0:00	0	-

# Decree 93,316 (1986-10-01)

Rule	Brazil	1986	only	-	Oct	25	 0:00	1:00	S

Rule	Brazil	1987	only	-	Feb	14	 0:00	0	-

# Decree 94,922 (1987-09-22)

Rule	Brazil	1987	only	-	Oct	25	 0:00	1:00	S

Rule	Brazil	1988	only	-	Feb	 7	 0:00	0	-

# Decree 96,676 (1988-09-12)

# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)

Rule	Brazil	1988	only	-	Oct	16	 0:00	1:00	S

Rule	Brazil	1989	only	-	Jan	29	 0:00	0	-

# Decree 98,077 (1989-08-21)

# with the same exceptions

Rule	Brazil	1989	only	-	Oct	15	 0:00	1:00	S

Rule	Brazil	1990	only	-	Feb	11	 0:00	0	-

# Decree 99,530 (1990-09-17)

# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.

# Decree 99,629 (1990-10-19) adds BA, MT.

Rule	Brazil	1990	only	-	Oct	21	 0:00	1:00	S

Rule	Brazil	1991	only	-	Feb	17	 0:00	0	-

# Unnumbered decree (1991-09-25)

# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.

Rule	Brazil	1991	only	-	Oct	20	 0:00	1:00	S

Rule	Brazil	1992	only	-	Feb	 9	 0:00	0	-

# Unnumbered decree (1992-10-16)

# adopted by same states.

Rule	Brazil	1992	only	-	Oct	25	 0:00	1:00	S

Rule	Brazil	1993	only	-	Jan	31	 0:00	0	-

# Decree 942 (1993-09-28)

# adopted by same states, plus AM.

# Decree 1,252 (1994-09-22;

# web page corrected 2004-01-07) adopted by same states, minus AM.

# Decree 1,636 (1995-09-14)

# adopted by same states, plus MT and TO.

# Decree 1,674 (1995-10-13)

# adds AL, SE.

Rule	Brazil	1993	1995	-	Oct	Sun>=11	 0:00	1:00	S

Rule	Brazil	1994	1995	-	Feb	Sun>=15	 0:00	0	-

Rule	Brazil	1996	only	-	Feb	11	 0:00	0	-

# Decree 2,000 (1996-09-04)

# adopted by same states, minus AL, SE.

Rule	Brazil	1996	only	-	Oct	 6	 0:00	1:00	S

Rule	Brazil	1997	only	-	Feb	16	 0:00	0	-

# From Daniel C. Sobral (1998-02-12):

# In 1997, the DS began on October 6. The stated reason was that

# because international television networks ignored Brazil's policy on DS,

# they bought the wrong times on satellite for coverage of Pope's visit.

# This year, the ending date of DS was postponed to March 1

# to help dealing with the shortages of electric power.

#

# Decree 2,317 (1997-09-04), adopted by same states.

Rule	Brazil	1997	only	-	Oct	 6	 0:00	1:00	S

# Decree 2,495

# (1998-02-10)

Rule	Brazil	1998	only	-	Mar	 1	 0:00	0	-

# Decree 2,780 (1998-09-11)

# adopted by the same states as before.

Rule	Brazil	1998	only	-	Oct	11	 0:00	1:00	S

Rule	Brazil	1999	only	-	Feb	21	 0:00	0	-

# Decree 3,150

# (1999-08-23) adopted by same states.

# Decree 3,188 (1999-09-30)

# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.

Rule	Brazil	1999	only	-	Oct	 3	 0:00	1:00	S

Rule	Brazil	2000	only	-	Feb	27	 0:00	0	-

# Decree 3,592 (2000-09-06)

# adopted by the same states as before.

# Decree 3,630 (2000-10-13)

# repeals DST in PE and RR, effective 2000-10-15 00:00.

# Decree 3,632 (2000-10-17)

# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.

# Decree 3,916

# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.

Rule	Brazil	2000	2001	-	Oct	Sun>=8	 0:00	1:00	S

Rule	Brazil	2001	2006	-	Feb	Sun>=15	 0:00	0	-

# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.

# 4,399

Rule	Brazil	2002	only	-	Nov	 3	 0:00	1:00	S

# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.

# 4,844

Rule	Brazil	2003	only	-	Oct	19	 0:00	1:00	S

# Decree 5,223 (2004-10-01) reestablishes DST in MT.

# 5,223

Rule	Brazil	2004	only	-	Nov	 2	 0:00	1:00	S

# Decree 5,539 (2005-09-19),

# adopted by the same states as before.

Rule	Brazil	2005	only	-	Oct	16	 0:00	1:00	S

# Decree 5,920 (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	-

# Decree 6,212 (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):