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@@ -68,51 +68,51 @@
# 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 1930 only - Dec 1 0:00 1:00 -
Rule Arg 1931 only - Apr 1 0:00 0 -
-Rule Arg 1931 only - Oct 15 0:00 1:00 S
+Rule Arg 1931 only - Oct 15 0:00 1:00 -
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 1932 1939 - Nov 1 0:00 1:00 -
+Rule Arg 1940 only - Jul 1 0:00 1:00 -
Rule Arg 1941 only - Jun 15 0:00 0 -
-Rule Arg 1941 only - Oct 15 0:00 1:00 S
+Rule Arg 1941 only - Oct 15 0:00 1:00 -
Rule Arg 1943 only - Aug 1 0:00 0 -
-Rule Arg 1943 only - Oct 15 0:00 1:00 S
+Rule Arg 1943 only - Oct 15 0:00 1:00 -
Rule Arg 1946 only - Mar 1 0:00 0 -
-Rule Arg 1946 only - Oct 1 0:00 1:00 S
+Rule Arg 1946 only - Oct 1 0:00 1:00 -
Rule Arg 1963 only - Oct 1 0:00 0 -
-Rule Arg 1963 only - Dec 15 0:00 1:00 S
+Rule Arg 1963 only - Dec 15 0:00 1:00 -
Rule Arg 1964 1966 - Mar 1 0:00 0 -
-Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
+Rule Arg 1964 1966 - Oct 15 0:00 1:00 -
Rule Arg 1967 only - Apr 2 0:00 0 -
-Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
+Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 -
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 - Jan 23 0:00 1:00 -
Rule Arg 1974 only - May 1 0:00 0 -
-Rule Arg 1988 only - Dec 1 0:00 1:00 S
+Rule Arg 1988 only - Dec 1 0:00 1:00 -
#
# From Hernan G. Otero (1995-06-26):
# These corrections were contributed by InterSoft Argentina S.A.,
# obtaining the data from the:
# Talleres de Hidrografía 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
+Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 -
#
# 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
+Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 -
# 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 -
@@ -211,28 +211,30 @@
# domingo 18 de octubre. Desde el Ministerio de Planificación se anunció
# que la Argentina hoy, en estas condiciones meteorológicas, no necesita
# la modificación del huso horario, ya que 2009 nos encuentra con
# crecimiento en la producción y distribución energética."
-Rule Arg 2007 only - Dec 30 0:00 1:00 S
+Rule Arg 2007 only - Dec 30 0:00 1:00 -
Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
-Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
+Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 -
# 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 (2014-08-09):
+# From Paul Eggert (2018-01-31):
# Hora de verano para la República Argentina
# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
# 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.
+# over Shanks & Pottenger. It is upward compatible with Milne, who
+# says Córdoba time was -4:16:48.2.
+
#
# 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
@@ -402,24 +404,21 @@
# 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):
+# From Paul Eggert (2018-01-23):
# Perhaps San Luis operates on the legal fiction that it is at -04
-# with perpetual summer time, but ordinary usage typically seems to
+# with perpetual daylight saving time, but ordinary usage typically seems to
# just say it's at -03; see, for example,
# https://es.wikipedia.org/wiki/Hora_oficial_argentina
# 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 Córdoba 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 # Córdoba Mean Time
@@ -550,11 +549,11 @@
-3:00 - -03
#
# 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
+Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 -
Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
@@ -792,18 +791,18 @@
# For now, assume western Amazonas will change as well.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
-Rule Brazil 1931 only - Oct 3 11:00 1:00 S
+Rule Brazil 1931 only - Oct 3 11:00 1:00 -
Rule Brazil 1932 1933 - Apr 1 0:00 0 -
-Rule Brazil 1932 only - Oct 3 0:00 1:00 S
+Rule Brazil 1932 only - Oct 3 0:00 1:00 -
# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
# revoked DST.
# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
-Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
+Rule Brazil 1949 1952 - Dec 1 0:00 1:00 -
Rule Brazil 1950 only - Apr 16 1:00 0 -
Rule Brazil 1951 1952 - Apr 1 0:00 0 -
# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
Rule Brazil 1953 only - Mar 1 0:00 0 -
# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
@@ -811,129 +810,129 @@
# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (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 <http://pcdsh01.on.br/HV53071.htm> (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
+Rule Brazil 1963 only - Dec 9 0:00 1:00 -
# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (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 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
-Rule Brazil 1965 only - Jan 31 0:00 1:00 S
+Rule Brazil 1965 only - Jan 31 0:00 1:00 -
Rule Brazil 1965 only - Mar 31 0:00 0 -
# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
-Rule Brazil 1965 only - Dec 1 0:00 1:00 S
+Rule Brazil 1965 only - Dec 1 0:00 1:00 -
# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
Rule Brazil 1966 1968 - Mar 1 0:00 0 -
-Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
+Rule Brazil 1966 1967 - Nov 1 0:00 1:00 -
# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
# revoked DST.
# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
-Rule Brazil 1985 only - Nov 2 0:00 1:00 S
+Rule Brazil 1985 only - Nov 2 0:00 1:00 -
# 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 1986 only - Oct 25 0:00 1:00 -
Rule Brazil 1987 only - Feb 14 0:00 0 -
# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
-Rule Brazil 1987 only - Oct 25 0:00 1:00 S
+Rule Brazil 1987 only - Oct 25 0:00 1:00 -
Rule Brazil 1988 only - Feb 7 0:00 0 -
# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (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 1988 only - Oct 16 0:00 1:00 -
Rule Brazil 1989 only - Jan 29 0:00 0 -
# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
# with the same exceptions
-Rule Brazil 1989 only - Oct 15 0:00 1:00 S
+Rule Brazil 1989 only - Oct 15 0:00 1:00 -
Rule Brazil 1990 only - Feb 11 0:00 0 -
# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (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 1990 only - Oct 21 0:00 1:00 -
Rule Brazil 1991 only - Feb 17 0:00 0 -
# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (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 1991 only - Oct 20 0:00 1:00 -
Rule Brazil 1992 only - Feb 9 0:00 0 -
# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
# adopted by same states.
-Rule Brazil 1992 only - Oct 25 0:00 1:00 S
+Rule Brazil 1992 only - Oct 25 0:00 1:00 -
Rule Brazil 1993 only - Jan 31 0:00 0 -
# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
# adopted by same states, plus AM.
# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
# web page corrected 2004-01-07) adopted by same states, minus AM.
# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
# adopted by same states, plus MT and TO.
# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
# adds AL, SE.
-Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
+Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 -
Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
Rule Brazil 1996 only - Feb 11 0:00 0 -
# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
# adopted by same states, minus AL, SE.
-Rule Brazil 1996 only - Oct 6 0:00 1:00 S
+Rule Brazil 1996 only - Oct 6 0:00 1:00 -
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
+Rule Brazil 1997 only - Oct 6 0:00 1:00 -
# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
# (1998-02-10)
Rule Brazil 1998 only - Mar 1 0:00 0 -
# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
# adopted by the same states as before.
-Rule Brazil 1998 only - Oct 11 0:00 1:00 S
+Rule Brazil 1998 only - Oct 11 0:00 1:00 -
Rule Brazil 1999 only - Feb 21 0:00 0 -
# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
# (1999-08-23) adopted by same states.
# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (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 1999 only - Oct 3 0:00 1:00 -
Rule Brazil 2000 only - Feb 27 0:00 0 -
# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
# adopted by the same states as before.
# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
# repeals DST in PE and RR, effective 2000-10-15 00:00.
# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
# (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 2000 2001 - Oct Sun>=8 0:00 1:00 -
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 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
-Rule Brazil 2002 only - Nov 3 0:00 1:00 S
+Rule Brazil 2002 only - Nov 3 0:00 1:00 -
# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
-Rule Brazil 2003 only - Oct 19 0:00 1:00 S
+Rule Brazil 2003 only - Oct 19 0:00 1:00 -
# Decree 5,223 (2004-10-01) reestablishes DST in MT.
# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
-Rule Brazil 2004 only - Nov 2 0:00 1:00 S
+Rule Brazil 2004 only - Nov 2 0:00 1:00 -
# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
# adopted by the same states as before.
-Rule Brazil 2005 only - Oct 16 0:00 1:00 S
+Rule Brazil 2005 only - Oct 16 0:00 1:00 -
# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
# adopted by the same states as before.
-Rule Brazil 2006 only - Nov 5 0:00 1:00 S
+Rule Brazil 2006 only - Nov 5 0:00 1:00 -
Rule Brazil 2007 only - Feb 25 0:00 0 -
# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
# adopted by the same states as before.
-Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
+Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 -
# 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 2017 - Oct Sun>=15 0:00 1:00 S
+Rule Brazil 2008 2017 - Oct Sun>=15 0:00 1:00 -
Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
# Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13)
# added Bahia.
Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
# Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15)
@@ -947,11 +946,11 @@
# According to many media sources, next year's DST start in Brazil will move to
# the first Sunday of November, and it will stay like that for the years after.
# ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html
# From Steffen Thorsen (2017-12-20):
# http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm
-Rule Brazil 2018 max - Nov Sun>=1 0:00 1:00 S
+Rule Brazil 2018 max - Nov Sun>=1 0:00 1:00 -
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 -
@@ -1254,44 +1253,44 @@
# so in theory, they will revert to -04/-03 after that, which means
# they will switch from -03 to -04 one hour after Santiago does that day.
# For now, assume that they will not revert.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
+Rule Chile 1927 1931 - Sep 1 0:00 1:00 -
Rule Chile 1928 1932 - Apr 1 0:00 0 -
-Rule Chile 1968 only - Nov 3 4:00u 1:00 S
+Rule Chile 1968 only - Nov 3 4:00u 1:00 -
Rule Chile 1969 only - Mar 30 3:00u 0 -
-Rule Chile 1969 only - Nov 23 4:00u 1:00 S
+Rule Chile 1969 only - Nov 23 4:00u 1:00 -
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 1970 1972 - Oct Sun>=9 4:00u 1:00 -
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 1973 only - Sep 30 4:00u 1:00 -
+Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 -
Rule Chile 1987 only - Apr 12 3:00u 0 -
Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 -
-Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 S
-Rule Chile 1990 only - Sep 16 4:00u 1:00 S
+Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 -
+Rule Chile 1990 only - Sep 16 4:00u 1:00 -
Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
-Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
+Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 -
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 1998 only - Sep 27 4:00u 1:00 -
Rule Chile 1999 only - Apr 4 3:00u 0 -
-Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
+Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 -
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 2011 only - Aug Sun>=16 4:00u 1:00 -
Rule Chile 2012 2014 - Apr Sun>=23 3:00u 0 -
-Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 S
+Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 -
Rule Chile 2016 max - May Sun>=9 3:00u 0 -
-Rule Chile 2016 max - Aug Sun>=9 4:00u 1:00 S
+Rule Chile 2016 max - Aug Sun>=9 4:00u 1:00 -
# 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 Jan 10 # Santiago Mean Time
@@ -1352,11 +1351,11 @@
# Milne gives 4:56:16.4 for Bogotá 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 1992 only - May 3 0:00 1:00 -
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 # Bogotá Mean Time
-5:00 CO -05/-04
@@ -1412,11 +1411,11 @@
# without sun"). Although Ballén's campaign slogan was "Ni un paso atrás"
# (Not one step back), the clocks went back in 1993 and the experiment was not
# repeated. For now, assume transitions were at 00:00 local time country-wide.
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Ecuador 1992 only - Nov 28 0:00 1:00 S
+Rule Ecuador 1992 only - Nov 28 0:00 1:00 -
Rule Ecuador 1993 only - Feb 5 0:00 0 -
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Guayaquil -5:19:20 - LMT 1890
-5:14:00 - QMT 1931 # Quito Mean Time
@@ -1502,26 +1501,26 @@
# 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
+# For now we will assume permanent -03 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 1937 1938 - Sep lastSun 0:00 1:00 -
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 1939 only - Oct 1 0:00 1:00 -
+Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 -
Rule Falk 1943 only - Jan 1 0:00 0 -
-Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
+Rule Falk 1983 only - Sep lastSun 0:00 1:00 -
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 1984 only - Sep 16 0:00 1:00 -
+Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 -
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
+Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 -
# 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 -04/-03 1983 May
-3:00 Falk -03/-02 1985 Sep 15
@@ -1552,20 +1551,20 @@
# 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 1988 - Oct 1 0:00 1:00 -
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 1989 only - Oct 22 0:00 1:00 -
+Rule Para 1990 only - Oct 1 0:00 1:00 -
+Rule Para 1991 only - Oct 6 0:00 1:00 -
Rule Para 1992 only - Mar 1 0:00 0 -
-Rule Para 1992 only - Oct 5 0:00 1:00 S
+Rule Para 1992 only - Oct 5 0:00 1:00 -
Rule Para 1993 only - Mar 31 0:00 0 -
-Rule Para 1993 1995 - Oct 1 0:00 1:00 S
+Rule Para 1993 1995 - Oct 1 0:00 1:00 -
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
@@ -1579,31 +1578,31 @@
# 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
+Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 -
# 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
+Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 -
#
# From Jesper Nørgaard 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 Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
# http://www.presidencia.gov.py/decretos/D1867.pdf
-Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
+Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 -
Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
# From Carlos Raúl 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
@@ -1612,11 +1611,11 @@
# Art. 1. It is hereby established that from the second Sunday of the month of
# April of this year (2010), the official time is to be set back 60 minutes,
# and that on the first Sunday of the month of October, it is to be set
# forward 60 minutes, in all the territory of the Paraguayan Republic.
# ...
-Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
+Rule Para 2010 max - Oct Sun>=1 0:00 1:00 -
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
@@ -1645,20 +1644,20 @@
#
# 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 - Jan 1 0:00 1:00 -
Rule Peru 1938 only - Apr 1 0:00 0 -
-Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
+Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 -
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 - Jan 1 0:00 1:00 -
Rule Peru 1986 1987 - Apr 1 0:00 0 -
-Rule Peru 1990 only - Jan 1 0:00 1:00 S
+Rule Peru 1990 only - Jan 1 0:00 1:00 -
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 - Jan 1 0:00 1:00 -
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 -05/-04
@@ -1700,96 +1699,227 @@
Link America/Port_of_Spain America/Tortola # Virgin Islands (UK)
# Uruguay
# From Paul Eggert (1993-11-18):
# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
-# From Shanks & Pottenger:
+#
+# From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael
+# Deckers (2018-02-20):
+# ... At least they kept good records...
+#
+# http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36
+# Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and
+# Meteorology Service of the Uruguayan Navy, seems to give many transitions
+# with greater clarity than we've had before. It directly references many laws
+# and decrees which are, in turn, referenced below. They can be viewed in the
+# public archives of the Diario Oficial (in Spanish) at
+# http://www.impo.com.uy/diariooficial/
+#
+# Ley No. 3920 of 1908-06-10 placed the determination of legal time under the
+# auspices of the National Institute for the Prediction of Time. It is unclear
+# exactly what offset was used during this period, though Ley No. 7200 of
+# 1920-04-23 used the Observatory of the National Meteorological Institute in
+# Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian,
+# retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00,
+# resulting in UT-04. Assume the corresponding LMT of UT-03:44:51 (given on
+# page 725 of the Proceedings of the Second Pan-American Scientific Congress,
+# 1915-1916) was in use, and merely became official from 1908-06-10.
+# https://www.impo.com.uy/diariooficial/1908/06/18/12
+# https://www.impo.com.uy/diariooficial/1920/04/27/9
+#
+# Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced
+# by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14
+# minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the
+# National Council of Administration the same day, published directly below the
+# law in the Diario Oficial, specified the first transition to be 1923-09-30
+# 24:00. This effectively established standard time at UT-03:30 with 30
+# minutes DST. Assume transitions at 24:00 on the specified days until Ley No.
+# 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other
+# provisions which oppose" it, resulting in year-round UT-03:30; a Resolución
+# of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it
+# would have been under the previous law.
+# https://www.impo.com.uy/diariooficial/1923/07/02/2
+# https://www.impo.com.uy/diariooficial/1926/03/10/2
+# https://www.impo.com.uy/diariooficial/1926/03/18/2
+#
# 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 1923 1925 - Oct 1 0:00 0:30 -
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
+# From Tim Parenti (2018-02-15):
+# http://www.impo.com.uy/diariooficial/1933/10/27/6
+#
+# It appears Ley No. 9122 of 1933 was never published as such in the Diario
+# Oficial, but instead appeared as Document 26 in the Diario on Friday
+# 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of
+# National Defense. It reinstituted a DST of 30 minutes (to UT-03) "from the
+# last Sunday of October...until the last Saturday of March." In accordance
+# with this provision, the first transition was explicitly specified in Article
+# 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29
+# at 00:00. Assume transitions at 00:00 Sunday throughout.
+#
+# Departing from the matter-of-fact nature of previous timekeeping laws, the
+# 1933 decree "consider[s] the advantages of...the advance of legal time":
+#
+# "Whereas: The measure adopted by almost all nations at the time of the last
+# World War still persists in North America and Europe, precisely because of
+# the economic, hygienic, and social advantages derived from such an
+# emergency measure...
+#
+# Whereas: The advance of the legal time during the summer seasons, by
+# displacing social activity near sunrise, favors the citizen populations
+# and especially the society that creates and works..."
+#
+# It further specified that "necessary measures" be taken to ensure that
+# "public spectacles finish, in general, before [01:00]."
+Rule Uruguay 1933 1938 - Oct lastSun 0:00 0:30 -
+Rule Uruguay 1934 1941 - Mar lastSat 24:00 0 -
+# From Tim Parenti (2018-02-15):
+# Most of the Rules below, and their contemporaneous Zone lines, have been
+# updated simply to match the Almanaque 2018. Although the document does not
+# list exact transition times, midnight transitions were already present in our
+# data here for all transitions through 2004-09, and this is both consistent
+# with prior transitions and verified in several decrees marked below between
+# 1939-09 and 2004-09, wherein the relevant text was typically of the form:
+#
+# "From 0 hours on [date], the legal time of the entire Republic will be...
+#
+# In accordance with [the preceding], on [previous date] at 24 hours, all
+# clocks throughout the Republic will be [advanced/retarded] by..."
+#
+# It is possible that there is greater specificity to be found for the Rules
+# below, but it is buried in no fewer than 40 different decrees individually
+# referenced by the Almanaque for the period from 1939-09 to 2014-09.
+# Four-fifths of these were promulgated less than two weeks before taking
+# effect; more than half within a week and none more than 5 weeks. Only the
+# handful with comments below have been checked with any thoroughness.
+Rule Uruguay 1939 only - Oct 1 0:00 0:30 -
+Rule Uruguay 1940 only - Oct 27 0:00 0:30 -
+# From Tim Parenti (2018-02-15):
+# Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified
+# UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel".
+# http://www.impo.com.uy/diariooficial/1941/08/04/1
+Rule Uruguay 1941 only - Aug 1 0:00 0:30 -
+# From Tim Parenti (2018-02-15):
+# Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified
+# further advancement (to UT-02:30) from Sunday 1942-12-13 24:00. Since clocks
+# never went back to UT-03:30 thereafter, this is modeled as advancing standard
+# time by 30 minutes to UT-03, while retaining 30 minutes of DST.
+# http://www.impo.com.uy/diariooficial/1942/12/16/3
+Rule Uruguay 1942 only - Dec 14 0:00 0:30 -
Rule Uruguay 1943 only - Mar 14 0:00 0 -
-Rule Uruguay 1959 only - May 24 0:00 1:00 S
+Rule Uruguay 1959 only - May 24 0:00 0:30 -
Rule Uruguay 1959 only - Nov 15 0:00 0 -
-Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
+Rule Uruguay 1960 only - Jan 17 0:00 1:00 -
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 - Apr 4 0:00 1:00 -
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
+# From Tim Parenti (2018-02-15):
+# Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the
+# day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00.
+# http://www.impo.com.uy/diariooficial/1968/05/30/5
+Rule Uruguay 1968 only - May 27 0:00 0:30 -
+Rule Uruguay 1968 only - Dec 1 0:00 0 -
+# From Tim Parenti (2018-02-15):
+# Decreto 188/970 of 1970-04-23 instituted restrictions on electricity
+# consumption "as a consequence of the current rainfall regime in the country".
+# Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00.
+# http://www.impo.com.uy/diariooficial/1970/04/29/4
+Rule Uruguay 1970 only - Apr 25 0:00 1:00 -
+Rule Uruguay 1970 only - Jun 14 0:00 0 -
+Rule Uruguay 1972 only - Apr 23 0:00 1:00 -
+Rule Uruguay 1972 only - Jul 16 0:00 0 -
+# From Tim Parenti (2018-02-15):
+# Decreto 29/974 of 1974-01-11, citing "the international rise in the price of
+# oil", advanced clocks by 90 minutes (to UT-01:30). Decreto 163/974 of
+# 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30
+# minutes followed in Decreto 679/974 of 1974-08-29.
+# http://www.impo.com.uy/diariooficial/1974/01/22/11
+# http://www.impo.com.uy/diariooficial/1974/03/14/3
+# http://www.impo.com.uy/diariooficial/1974/09/04/6
+Rule Uruguay 1974 only - Jan 13 0:00 1:30 -
+Rule Uruguay 1974 only - Mar 10 0:00 0:30 -
+Rule Uruguay 1974 only - Sep 1 0:00 0 -
+Rule Uruguay 1974 only - Dec 22 0:00 1:00 -
+Rule Uruguay 1975 only - Mar 30 0:00 0 -
+Rule Uruguay 1976 only - Dec 19 0:00 1:00 -
+Rule Uruguay 1977 only - Mar 6 0:00 0 -
+Rule Uruguay 1977 only - Dec 4 0:00 1:00 -
+Rule Uruguay 1978 1979 - Mar Sun>=1 0:00 0 -
+Rule Uruguay 1978 only - Dec 17 0:00 1:00 -
+Rule Uruguay 1979 only - Apr 29 0:00 1:00 -
+Rule Uruguay 1980 only - Mar 16 0:00 0 -
+# From Tim Parenti (2018-02-15):
+# Decreto 725/987 of 1987-12-04 cited "better use of national tourist
+# attractions" to advance clocks one hour from Monday 1987-12-14 00:00.
+# http://www.impo.com.uy/diariooficial/1988/01/25/1
+Rule Uruguay 1987 only - Dec 14 0:00 1:00 -
+Rule Uruguay 1988 only - Feb 28 0:00 0 -
+Rule Uruguay 1988 only - Dec 11 0:00 1:00 -
+Rule Uruguay 1989 only - Mar 5 0:00 0 -
+Rule Uruguay 1989 only - Oct 29 0:00 1:00 -
+Rule Uruguay 1990 only - Feb 25 0:00 0 -
+# From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04):
+# IATA agrees as below for 1990-10 through 1993-02. Per Almanaque 2018, the
+# 1992/1993 season appears to be the first in over half a century where DST
+# both began and ended pursuant to the same decree.
+Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 -
+Rule Uruguay 1991 1992 - Mar Sun>=1 0:00 0 -
+Rule Uruguay 1992 only - Oct 18 0:00 1:00 -
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 Tim Parenti (2018-02-15):
+# Decreto 328/004 of 2004-09-15.
+# http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1
+Rule Uruguay 2004 only - Sep 19 0:00 1:00 -
# 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
+# From Tim Parenti (2018-02-15):
+# This 2005 postponement is not in Almanaque 2018. Go with the contemporaneous
+# reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending
+# Decreto 328/004:
+# http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1
+# The original decree specified a transition of 2005-03-12 24:00, but the new
+# one specified 2005-03-27 02:00.
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 Nørgaard Welen (2006-09-06):
-# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
-#
+# ...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.
+# From Tim Parenti (2018-02-15):
+# Decreto 318/005 of 2005-09-19.
+# http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1
+Rule Uruguay 2005 only - Oct 9 2:00 1:00 -
+Rule Uruguay 2006 2015 - Mar Sun>=8 2:00 0 -
+# From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06):
+# Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday
+# of October at 02:00 through the second Sunday of March at 02:00. Almanaque
+# 2018 appears to have a few typoed dates through this period; ignore them.
+# http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1
+Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 -
# From Steffen Thorsen (2015-06-30):
# ... it looks like they will not be using DST the coming summer:
# http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
# http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/
# From Paul Eggert (2015-06-30):
# Apparently restaurateurs complained that DST caused people to go to the beach
# instead of out to dinner.
# From Pablo Camargo (2015-07-13):
# http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
-# [dated 2015-06-29; repeals Decree 311/006 dated 2006-09-04]
-Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 S
-Rule Uruguay 2007 2015 - Mar Sun>=8 2:00 0 -
+# From Tim Parenti (2018-02-15):
+# Decreto 178/015 of 2015-06-29; repeals Decreto 311/006.
# This Zone can be simplified once we assume zic %z.
-Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
- -3:44:44 - MMT 1920 May 1 # Montevideo MT
+Zone America/Montevideo -3:44:51 - LMT 1908 Jun 10
+ -3:44:51 - MMT 1920 May 1 # Montevideo MT
+ -4:00 - -04 1923 Oct 1
-3:30 Uruguay -0330/-03 1942 Dec 14
+ -3:00 Uruguay -03/-0230 1960
-3:00 Uruguay -03/-02 1968
- -3:00 Uruguay -03/-0230 1971
+ -3:00 Uruguay -03/-0230 1970
-3:00 Uruguay -03/-02 1974
+ -3:00 Uruguay -03/-0130 1974 Mar 10
-3:00 Uruguay -03/-0230 1974 Dec 22
-3:00 Uruguay -03/-02
# Venezuela
#
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