diff -r 07b686da11c4 -r c7d7946239de jdk/make/data/tzdata/southamerica --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/jdk/make/data/tzdata/southamerica Thu Nov 14 11:19:32 2013 +0100 @@ -0,0 +1,1785 @@ +# +# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. +# +# This code is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License version 2 only, as +# published by the Free Software Foundation. Oracle designates this +# particular file as subject to the "Classpath" exception as provided +# by Oracle in the LICENSE file that accompanied this code. +# +# This code is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +# version 2 for more details (a copy is included in the LICENSE file that +# accompanied this code). +# +# You should have received a copy of the GNU General Public License version +# 2 along with this work; if not, write to the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. +# +# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA +# or visit www.oracle.com if you need additional information or have any +# questions. +# +# 
+# 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@iana.org 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).
+#
+# For data circa 1899, a common source is:
+# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
+# .
+#
+# 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
+# 
+
+# From fullinet (2009-10-18):
+# As announced in
+# 
+# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
+# 
+# (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."
+
+Rule	Arg	2007	only	-	Dec	30	0:00	1:00	S
+Rule	Arg	2008	2009	-	Mar	Sun>=15	0:00	0	-
+Rule	Arg	2008	only	-	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 ...
+# http://www.lanacion.com.ar/nota.asp?nota_id=1107912
+#
+# The press release says [quick and 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 Mariano Absatz (2009-10-16):
+# ...the Province of San Luis is a case in itself.
+#
+# The Law at
+# 
+# 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.
+#
+# 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".
+# ...
+
+# 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 prórroga del huso horario de verano (Spanish)
+# 
+# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
+# 
+# or (some English translation):
+# 
+# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
+# 
+
+# 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.
+
+# From Paul Eggert (2013-09-05):
+# Perhaps San Luis operates on the legal fiction that it is at UTC-4
+# with perpetual summer time, but ordinary usage typically seems to
+# just say it's at UTC-3; see, for example,
+# .
+# We've documented similar situations as being plain changes to
+# standard time, so let's do that here too.  This does not change UTC
+# offsets, only tm_isdst and the time zone abbreviations.  One minor
+# plus is that this silences a zic complaint that there's no POSIX TZ
+# setting for time stamps past 2038.
+
+# From Paul Eggert (2013-02-21):
+# Milne says Cordoba time was -4:16:48.2.  Round to the nearest second.
+
+# 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)
+
+Rule	SanLuis	2008	2009	-	Mar	Sun>=8	0:00	0	-
+Rule	SanLuis	2007	2008	-	Oct	Sun>=8	0:00	1:00	S
+
+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
+			-4:00	SanLuis	WAR%sT	2009 Oct 11
+			-3:00	-	ART
+#
+# Santa Cruz (SC)
+Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
+			-4:16:48 -	CMT	1920 May # Cordoba Mean Time
+			-4:00	-	ART	1930 Dec
+			-4:00	Arg	AR%sT	1969 Oct  5
+			-3:00	Arg	AR%sT	1999 Oct  3
+			-4:00	Arg	AR%sT	2000 Mar  3
+			-3:00	-	ART	2004 Jun  1
+			-4:00	-	WART	2004 Jun 20
+			-3:00	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
+Link America/Curacao America/Aruba
+
+# 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...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
+# 
+#
+# From Alexander Krivenyshev (2011-10-04):
+# State Bahia will return to Daylight savings time this year after 8 years off.
+# The announcement was made by Governor Jaques Wagner in an interview to a
+# television station in Salvador.
+
+# In Portuguese:
+# 
+# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
+#  and
+# 
+# http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
+# 
+
+# From Guilherme Bernardes Rodrigues (2011-10-07):
+# There is news in the media, however there is still no decree about it.
+# I just send a e-mail to Zulmira Brandao at
+# http://pcdsh01.on.br/ the
+# official agency about time in Brazil, and she confirmed that the old rule is
+# still in force.
+
+# 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 :
+# 
+# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
+# 
+
+# 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
+
+# From Steffen Thorsen (2013-09-20):
+# Tocantins in Brazil is very likely not to observe DST from October....
+# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
+# We will keep this article updated when this is confirmed:
+# http://www.timeanddate.com/news/time/brazil-starts-dst-2013.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):
+# According to this decree
+# 
+# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
+# 
+# [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	-
+
+# The latest ruleset listed above says that the following states observe DST:
+# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
+
+# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+#
+# Fernando de Noronha (administratively part of PE)
+Zone America/Noronha	-2:09:40 -	LMT	1914
+			-2:00	Brazil	FN%sT	1990 Sep 17
+			-2:00	-	FNT	1999 Sep 30
+			-2:00	Brazil	FN%sT	2000 Oct 15
+			-2:00	-	FNT	2001 Sep 13
+			-2:00	Brazil	FN%sT	2002 Oct  1
+			-2:00	-	FNT
+# Other Atlantic islands have no permanent settlement.
+# These include Trindade and Martin Vaz (administratively part of ES),
+# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
+# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
+# it also included the Penedos.
+#
+# Amapa (AP), east Para (PA)
+# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
+# The division between east and west Para is the river Xingu.
+# In the north a very small part from the river Javary (now Jari I guess,
+# the border with Amapa) to the Amazon, then to the Xingu.
+Zone America/Belem	-3:13:56 -	LMT	1914
+			-3:00	Brazil	BR%sT	1988 Sep 12
+			-3:00	-	BRT
+#
+# 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
+#
+# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
+# Paraiba (PB)
+Zone America/Fortaleza	-2:34:00 -	LMT	1914
+			-3:00	Brazil	BR%sT	1990 Sep 17
+			-3:00	-	BRT	1999 Sep 30
+			-3:00	Brazil	BR%sT	2000 Oct 22
+			-3:00	-	BRT	2001 Sep 13
+			-3:00	Brazil	BR%sT	2002 Oct  1
+			-3:00	-	BRT
+#
+# Pernambuco (PE) (except Atlantic islands)
+Zone America/Recife	-2:19:36 -	LMT	1914
+			-3:00	Brazil	BR%sT	1990 Sep 17
+			-3:00	-	BRT	1999 Sep 30
+			-3:00	Brazil	BR%sT	2000 Oct 15
+			-3:00	-	BRT	2001 Sep 13
+			-3:00	Brazil	BR%sT	2002 Oct  1
+			-3:00	-	BRT
+#
+# Tocantins (TO)
+Zone America/Araguaina	-3:12:48 -	LMT	1914
+			-3:00	Brazil	BR%sT	1990 Sep 17
+			-3:00	-	BRT	1995 Sep 14
+			-3:00	Brazil	BR%sT	2003 Sep 24
+			-3:00	-	BRT	2012 Oct 21
+			-3:00	Brazil	BR%sT	2013 Sep
+			-3:00	-	BRT
+#
+# 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
+			-3:00	Brazil	BR%sT	2000 Oct 22
+			-3:00	-	BRT	2001 Sep 13
+			-3:00	Brazil	BR%sT	2002 Oct  1
+			-3:00	-	BRT
+#
+# Bahia (BA)
+# There are too many Salvadors elsewhere, so use America/Bahia instead
+# of America/Salvador.
+Zone America/Bahia	-2:34:04 -	LMT	1914
+			-3:00	Brazil	BR%sT	2003 Sep 24
+			-3:00	-	BRT	2011 Oct 16
+			-3:00	Brazil	BR%sT	2012 Oct 21
+			-3:00	-	BRT
+#
+# Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
+# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
+# Santa Catarina (SC), Rio Grande do Sul (RS)
+Zone America/Sao_Paulo	-3:06:28 -	LMT	1914
+			-3:00	Brazil	BR%sT	1963 Oct 23 00:00
+			-3:00	1:00	BRST	1964
+			-3:00	Brazil	BR%sT
+#
+# Mato Grosso do Sul (MS)
+Zone America/Campo_Grande -3:38:28 -	LMT	1914
+			-4:00	Brazil	AM%sT
+#
+# Mato Grosso (MT)
+Zone America/Cuiaba	-3:44:20 -	LMT	1914
+			-4:00	Brazil	AM%sT	2003 Sep 24
+			-4:00	-	AMT	2004 Oct  1
+			-4:00	Brazil	AM%sT
+#
+# Rondonia (RO)
+Zone America/Porto_Velho -4:15:36 -	LMT	1914
+			-4:00	Brazil	AM%sT	1988 Sep 12
+			-4:00	-	AMT
+#
+# Roraima (RR)
+Zone America/Boa_Vista	-4:02:40 -	LMT	1914
+			-4:00	Brazil	AM%sT	1988 Sep 12
+			-4:00	-	AMT	1999 Sep 30
+			-4:00	Brazil	AM%sT	2000 Oct 15
+			-4:00	-	AMT
+#
+# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
+# The great circle line from Tabatinga to Porto Acre divides
+# east from west Amazonas.
+Zone America/Manaus	-4:00:04 -	LMT	1914
+			-4:00	Brazil	AM%sT	1988 Sep 12
+			-4:00	-	AMT	1993 Sep 28
+			-4:00	Brazil	AM%sT	1994 Sep 22
+			-4:00	-	AMT
+#
+# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
+#	Eirunepe, Envira, Ipixuna
+Zone America/Eirunepe	-4:39:28 -	LMT	1914
+			-5:00	Brazil	AC%sT	1988 Sep 12
+			-5:00	-	ACT	1993 Sep 28
+			-5:00	Brazil	AC%sT	1994 Sep 22
+			-5:00	-	ACT	2008 Jun 24 00:00
+			-4:00	-	AMT
+#
+# Acre (AC)
+Zone America/Rio_Branco	-4:31:12 -	LMT	1914
+			-5:00	Brazil	AC%sT	1988 Sep 12
+			-5:00	-	ACT	2008 Jun 24 00:00
+			-4:00	-	AMT
+
+# 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).
+
+# From Oscar van Vlijmen (2006-10-08):
+# http://www.horaoficial.cl/cambio.htm
+
+# 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.
+
+# From Paul Eggert (2006-12-27):
+# The following data for Chile and America/Santiago are from
+#  (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.
+
+# 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)
+# The Supreme Decree is located at
+# 
+# http://www.shoa.cl/servicios/supremo316.pdf
+# 
+# and the instructions for 2008 are located in:
+# 
+# http://www.horaoficial.cl/cambio.htm
+# .
+
+# From Jose Miguel Garrido (2008-03-05):
+# ...
+# You could see the announces of the change on
+# 
+# http://www.shoa.cl/noticias/2008/04hora/hora.htm
+# .
+
+# From Angel Chiang (2010-03-04):
+# Subject: DST in Chile exceptionally extended to 3 April due to earthquake
+# 
+# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
+# 
+# (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.
+
+# 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:
+# 
+# http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651
+# 
+#
+# This is not yet reflected in the official "cambio de hora" site, but
+# probably will be soon:
+# 
+# http://www.horaoficial.cl/cambio.htm
+# 
+
+# 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.
+
+# From Glenn Eychaner (2011-03-28):
+# The article:
+# 
+# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
+# 
+#
+# 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.
+
+# 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.
+
+# 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
+
+# NOTE: ChileAQ rules for Antarctic bases are stored separately in the
+# 'antarctica' file.
+
+# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
+Rule	Chile	1927	1932	-	Sep	 1	0:00	1:00	S
+Rule	Chile	1928	1932	-	Apr	 1	0:00	0	-
+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	-
+Rule	Chile	1998	only	-	Sep	27	4:00u	1:00	S
+Rule	Chile	1999	only	-	Apr	 4	3:00u	0	-
+Rule	Chile	1999	2010	-	Oct	Sun>=9	4:00u	1:00	S
+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	-
+Rule	Chile	2009	only	-	Mar	Sun>=9	3:00u	0	-
+Rule	Chile	2010	only	-	Apr	Sun>=1	3:00u	0	-
+Rule	Chile	2011	only	-	May	Sun>=2	3:00u	0	-
+Rule	Chile	2011	only	-	Aug	Sun>=16	4:00u	1:00	S
+Rule	Chile	2012	max	-	Apr	Sun>=23	3:00u	0	-
+Rule	Chile	2012	max	-	Sep	Sun>=2	4:00u	1:00	S
+# IATA SSIM anomalies: (1992-02) says 1992-03-14;
+# (1996-09) says 1998-03-08.  Ignore these.
+# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+Zone America/Santiago	-4:42:46 -	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
+			-4:00	Chile	CL%sT
+Zone Pacific/Easter	-7:17:44 -	LMT	1890
+			-7:17:28 -	EMT	1932 Sep    # Easter Mean Time
+			-7:00	Chile	EAS%sT	1982 Mar 13 21:00 # Easter I Time
+			-6:00	Chile	EAS%sT
+#
+# Sala y Gomez Island is like Pacific/Easter.
+# Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
+# San Felix, and Antarctic bases, are like America/Santiago.
+
+# Colombia
+
+# 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."
+
+# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
+Rule	CO	1992	only	-	May	 3	0:00	1:00	S
+Rule	CO	1993	only	-	Apr	 4	0:00	0	-
+# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+Zone	America/Bogota	-4:56:16 -	LMT	1884 Mar 13
+			-4:56:16 -	BMT	1914 Nov 23 # Bogota Mean Time
+			-5:00	CO	CO%sT	# Colombia Time
+# Malpelo, Providencia, San Andres
+# no information; probably like America/Bogota
+
+# Curacao
+
+# Milne gives 4:35:46.9 for Curacao mean time; round to nearest.
+#
+# From Paul Eggert (2006-03-22):
+# 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.
+# This all predates our 1970 cutoff, though.
+#
+# 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.
+#
+# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+Zone	America/Curacao	-4:35:47 -	LMT	1912 Feb 12	# Willemstad
+			-4:30	-	ANT	1965 # Netherlands Antilles Time
+			-4:00	-	AST
+
+# From Arthur David Olson (2011-06-15):
+# 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	# Caribbean Netherlands
+
+# Ecuador
+#
+# Milne says the Sentral and South American Telegraph Company used -5:24:15.
+#
+# From Paul Eggert (2007-03-04):
+# Apparently Ecuador had a failed experiment with DST in 1992.
+#  (2007-02-27) and
+#  (2006-11-06) both
+# talk about "hora Sixto".  Leave this alone for now, as we have no data.
+#
+# 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
+
+# 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.
+
+# 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.
+
+# From Steffen Thorsen (2011-04-01):
+# The Falkland Islands will not turn back clocks this winter, but stay on
+# daylight saving time.
+#
+# One source:
+# 
+# http://www.falklandnews.com/public/story.cfm?get=5914&source=3
+# 
+#
+# 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.
+#
+# 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.)
+# 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
+Rule	Falk	1985	2000	-	Sep	Sun>=9	0:00	1:00	S
+Rule	Falk	1986	2000	-	Apr	Sun>=16	0:00	0	-
+Rule	Falk	2001	2010	-	Apr	Sun>=15	2:00	0	-
+Rule	Falk	2001	2010	-	Sep	Sun>=1	2:00	1:00	S
+# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+Zone Atlantic/Stanley	-3:51:24 -	LMT	1890
+			-3:51:24 -	SMT	1912 Mar 12  # Stanley Mean Time
+			-4:00	Falk	FK%sT	1983 May     # Falkland Is Time
+			-3:00	Falk	FK%sT	1985 Sep 15
+			-4:00	Falk	FK%sT	2010 Sep 5 02:00
+			-3:00	-	FKST
+
+# French Guiana
+# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+Zone America/Cayenne	-3:29:20 -	LMT	1911 Jul
+			-4:00	-	GFT	1967 Oct # French Guiana Time
+			-3:00	-	GFT
+
+# Guyana
+# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+Zone	America/Guyana	-3:52:40 -	LMT	1915 Mar	# Georgetown
+			-3:45	-	GBGT	1966 May 26 # Br Guiana Time
+			-3:45	-	GYT	1975 Jul 31 # Guyana Time
+			-3:00	-	GYT	1991
+# IATA SSIM (1996-06) says -4:00.  Assume a 1991 switch.
+			-4:00	-	GYT
+
+# Paraguay
+#
+# From Paul Eggert (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
+# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
+#
+# From Waldemar Villamayor-Venialbo (2013-09-20):
+# No time of the day is established for the adjustment, so people normally
+# adjust their clocks at 0 hour of the given dates.
+#
+# 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	-
+# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
+# From Steffen Thorsen (2000-10-02):
+# I have three independent reports that Paraguay changed to DST this Sunday
+# (10-01).
+#
+# Translated by Gwillim Law (2001-02-27) from
+# 
+# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
+# :
+# Starting at 0:00 today, the clock will be set forward 60 minutes, in
+# fulfillment of Decree No. 7,273 of the Executive Power....  The time change
+# system has been operating for several years.  Formerly there was a separate
+# decree each year; the new law has the same effect, but permanently.  Every
+# year, the time will change on the first Sunday of October; likewise, the
+# clock will be set back on the first Sunday of March.
+#
+Rule	Para	1996	2001	-	Oct	Sun>=1	0:00	1:00	S
+# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
+Rule	Para	1997	only	-	Feb	lastSun	0:00	0	-
+# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
+# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
+Rule	Para	1998	2001	-	Mar	Sun>=1	0:00	0	-
+# From Rives McDow (2002-02-28):
+# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
+# dst method to be from the first Sunday in September to the first Sunday in
+# April.
+Rule	Para	2002	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)
+# 
+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 (
+# 
+# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
+# 
+# )
+# 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	2012	-	Apr	Sun>=8	0:00	0	-
+#
+# From Steffen Thorsen (2013-03-07):
+# Paraguay will end DST on 2013-03-24 00:00....
+# http://www.ande.gov.py/interna.php?id=1075
+#
+# From Carlos Raul Perasso (2013-03-15):
+# The change in Paraguay is now final.  Decree number 10780
+# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
+Rule	Para	2013	max	-	Mar	Sun>=22	0:00	0	-
+
+# 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
+#
+# 
+# From Evelyn C. Leeper via Mark Brader (2003-10-26):
+# When we were in Peru in 1985-1986, they apparently switched over
+# sometime between December 29 and January 3 while we were on the Amazon.
+#
+# From Paul Eggert (2006-03-22):
+# Shanks & Pottenger don't have this transition.  Assume 1986 was like 1987.
+
+# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
+Rule	Peru	1938	only	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1938	only	-	Apr	 1	0:00	0	-
+Rule	Peru	1938	1939	-	Sep	lastSun	0:00	1:00	S
+Rule	Peru	1939	1940	-	Mar	Sun>=24	0:00	0	-
+Rule	Peru	1986	1987	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1986	1987	-	Apr	 1	0:00	0	-
+Rule	Peru	1990	only	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1990	only	-	Apr	 1	0:00	0	-
+# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
+Rule	Peru	1994	only	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1994	only	-	Apr	 1	0:00	0	-
+# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+Zone	America/Lima	-5:08:12 -	LMT	1890
+			-5:08:36 -	LMT	1908 Jul 28 # Lima Mean Time?
+			-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
+
+Link America/Port_of_Spain America/Anguilla
+Link America/Port_of_Spain America/Dominica
+Link America/Port_of_Spain America/Grenada
+Link America/Port_of_Spain America/Guadeloupe
+Link America/Port_of_Spain America/Marigot
+Link America/Port_of_Spain America/Montserrat
+Link America/Port_of_Spain America/St_Barthelemy
+Link America/Port_of_Spain America/St_Kitts
+Link America/Port_of_Spain America/St_Lucia
+Link America/Port_of_Spain America/St_Thomas
+Link America/Port_of_Spain America/St_Vincent
+Link America/Port_of_Spain America/Tortola
+
+# Uruguay
+# From Paul Eggert (1993-11-18):
+# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
+# From Shanks & Pottenger:
+# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
+# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
+Rule	Uruguay	1923	only	-	Oct	 2	 0:00	0:30	HS
+Rule	Uruguay	1924	1926	-	Apr	 1	 0:00	0	-
+Rule	Uruguay	1924	1925	-	Oct	 1	 0:00	0:30	HS
+Rule	Uruguay	1933	1935	-	Oct	lastSun	 0:00	0:30	HS
+# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
+Rule	Uruguay	1934	1936	-	Mar	Sat>=25	23:30s	0	-
+Rule	Uruguay	1936	only	-	Nov	 1	 0:00	0:30	HS
+Rule	Uruguay	1937	1941	-	Mar	lastSun	 0:00	0	-
+# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
+Rule	Uruguay	1937	1940	-	Oct	lastSun	 0:00	0:30	HS
+# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
+# and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
+Rule	Uruguay	1941	only	-	Aug	 1	 0:00	0:30	HS
+Rule	Uruguay	1942	only	-	Jan	 1	 0:00	0	-
+Rule	Uruguay	1942	only	-	Dec	14	 0:00	1:00	S
+Rule	Uruguay	1943	only	-	Mar	14	 0:00	0	-
+Rule	Uruguay	1959	only	-	May	24	 0:00	1:00	S
+Rule	Uruguay	1959	only	-	Nov	15	 0:00	0	-
+Rule	Uruguay	1960	only	-	Jan	17	 0:00	1:00	S
+Rule	Uruguay	1960	only	-	Mar	 6	 0:00	0	-
+Rule	Uruguay	1965	1967	-	Apr	Sun>=1	 0:00	1:00	S
+Rule	Uruguay	1965	only	-	Sep	26	 0:00	0	-
+Rule	Uruguay	1966	1967	-	Oct	31	 0:00	0	-
+Rule	Uruguay	1968	1970	-	May	27	 0:00	0:30	HS
+Rule	Uruguay	1968	1970	-	Dec	 2	 0:00	0	-
+Rule	Uruguay	1972	only	-	Apr	24	 0:00	1:00	S
+Rule	Uruguay	1972	only	-	Aug	15	 0:00	0	-
+Rule	Uruguay	1974	only	-	Mar	10	 0:00	0:30	HS
+Rule	Uruguay	1974	only	-	Dec	22	 0:00	1:00	S
+Rule	Uruguay	1976	only	-	Oct	 1	 0:00	0	-
+Rule	Uruguay	1977	only	-	Dec	 4	 0:00	1:00	S
+Rule	Uruguay	1978	only	-	Apr	 1	 0:00	0	-
+Rule	Uruguay	1979	only	-	Oct	 1	 0:00	1:00	S
+Rule	Uruguay	1980	only	-	May	 1	 0:00	0	-
+Rule	Uruguay	1987	only	-	Dec	14	 0:00	1:00	S
+Rule	Uruguay	1988	only	-	Mar	14	 0:00	0	-
+Rule	Uruguay	1988	only	-	Dec	11	 0:00	1:00	S
+Rule	Uruguay	1989	only	-	Mar	12	 0:00	0	-
+Rule	Uruguay	1989	only	-	Oct	29	 0:00	1:00	S
+# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
+# and that 1992/3's DST was from 10-25 to 03-01.  Go with IATA.
+Rule	Uruguay	1990	1992	-	Mar	Sun>=1	 0:00	0	-
+Rule	Uruguay	1990	1991	-	Oct	Sun>=21	 0:00	1:00	S
+Rule	Uruguay	1992	only	-	Oct	18	 0:00	1:00	S
+Rule	Uruguay	1993	only	-	Feb	28	 0:00	0	-
+# 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	-
+# 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
+#
+# 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
+
+# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
+Zone	America/Caracas	-4:27:44 -	LMT	1890
+			-4:27:40 -	CMT	1912 Feb 12 # Caracas Mean Time?
+			-4:30	-	VET	1965	     # Venezuela Time
+			-4:00	-	VET	2007 Dec  9 03:00
+			-4:30	-	VET