Branch: Tag:

2018-04-14

2018-04-14 12:23:58 by Henrik Grubbström (Grubba) <grubba@grubba.org>

Updated to tzdata2018d.

47:   # 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.,
76:   # 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
87:   # 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
190:   # 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
202:   # 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:
381:   # 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
392:   # 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),
529:   # 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
771:   # 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)
790:   # 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.
844:   # 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
859:   # 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.
881:   # 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.
926:   # ... 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 -
1233:   # 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.
1262:   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]
1331:   # "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
1391:   # 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]
1481:   # 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
1531:   # 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.
1558:   # 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
1569:   # 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
1578:   # 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
1591:   # 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):
1624:   # 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
1679:   # 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
1754:   # 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