Here are some more proposed changes to the tz data. The Chilean and Brazilian changes are relatively urgent, so I thought I'd send this out now. * Chile started observing DST this year on 09-26, due the the drought. Thanks to Ian Tragen for informing us of this, and to Eduardo Krell for providing the details. * Brazil's 1998/1998 transitions will differ the values predicted in the current tz data; I sent out a draft of this change earlier. Thanks to Marcos Tadeu for the info and pointers. * Adjust some historical data for Germany in 1945 and 1946 to better match the data at the official German web site for DST. Also, change the suffix for continental-Europe double summer time from DST to MT (Midsummer Time), as per the PDB. Thanks to Markus Kuhn for the pointer to this info. =================================================================== RCS file: RCS/southamerica,v retrieving revision 1998.8 retrieving revision 1998.8.0.4 diff -u -r1998.8 -r1998.8.0.4 --- southamerica 1998/09/24 14:46:11 1998.8 +++ southamerica 1998/09/29 19:46:53 1998.8.0.4 @@ -184,14 +184,6 @@ # Brazil -# From Guy Harris: -# The OAG lists 1987-10-25 and 1988-02-12 as the starting and -# ending dates, giving them as "estimated date(s) based on previous year". We -# infer a rule here from one example, always a dangerous practice.... Yes, -# they really do switch on Saturday, according to the OAG. -# "[America/Porto_Acre]" is for the [State] of Acre; -# "[America/Noronha]" is for Fernando De Noronha. - # From Paul Eggert <eggert@twinsun.com> (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. @@ -247,33 +239,78 @@ # error. Line 193 say "Territory of Acre". It is not a territory anymore # but a state. +# From Marcos Tadeu (1998-09-27): +# <a href="http://pcdsh01.on.br/verao1.html"> +# Brazilian official page +# </a> +# +# From Paul Eggert (1998-09-28): +# The official decrees referenced below are taken from +# <a href="http://pcdsh01.on.br/DecHV.html"> +# Decretos sobre o Horario de Verao no Brasil +# </a> (1998-09-25, in Portuguese). +# I don't read Portuguese, and haven't been able to verify them against +# the Shanks and IATA data; there do seem to be minor discrepancies. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20.466</a> (1931-01-10) +# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21.896</a> (1932-01-10) Rule Brazil 1931 only - Oct 3 11:00 1:00 D Rule Brazil 1932 1933 - Apr 1 0:00 0 S Rule Brazil 1932 only - Oct 3 0:00 1:00 D +# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23.195</a> (1933-10-10) +# revoked DST. +# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27.496</a> (1949-11-24) +# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27.998</a> (1950-04-13) +# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32.308</a> (1953-02-24) Rule Brazil 1949 1952 - Dec 1 0:00 1:00 D Rule Brazil 1950 only - Apr 16 0:00 0 S Rule Brazil 1951 1953 - Apr 1 0:00 0 S +# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34.724</a> (1953-11-30) +# revoked DST. +# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52.700</a> (1963-10-18) +# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53.071</a> (1963-12-03) Rule Brazil 1963 only - Dec 9 0:00 1:00 D +# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53.604</a> (1964-02-25) Rule Brazil 1964 only - Mar 1 0:00 0 S +# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55.639</a> (1965-01-27) Rule Brazil 1965 only - Jan 31 0:00 1:00 D Rule Brazil 1965 only - Apr 1 0:00 0 S +# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57.303</a> (1965-11-22) Rule Brazil 1965 only - Dec 1 0:00 1:00 D +# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57.843</a> (1966-02-18) Rule Brazil 1966 1968 - Mar 1 0:00 0 S Rule Brazil 1966 1967 - Nov 1 0:00 1:00 D +# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63.429</a> (1968-10-15) +# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91.698</a> (1985-09-27) Rule Brazil 1985 only - Nov 2 0:00 1:00 D +# Decree 92.310 (1986-01-21) +# Decree 92.463 (1986-03-13) Rule Brazil 1986 only - Mar 15 0:00 0 S +# Decree 93.316 (1986-10-01) +# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94.922</a> (1987-09-22) Rule Brazil 1986 1987 - Oct Sat<=28 0:00 1:00 D Rule Brazil 1987 only - Feb 14 0:00 0 S Rule Brazil 1988 only - Feb 7 0:00 0 S +# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96.676</a> (1988-09-12) +# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98.077</a> (1989-08-21) +# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99.530</a> (1990-09-17) +# Decree 99.629 (1990-10-19) +# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25): +# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16): Rule Brazil 1989 only - Jan 22 0:00 0 S Rule Brazil 1988 1989 - Oct Sun>=10 0:00 1:00 D Rule Brazil 1990 1991 - Feb Sun>=11 0:00 0 S Rule Brazil 1990 1992 - Oct Sun>=20 0:00 1:00 D Rule Brazil 1992 only - Feb 9 0:00 0 S +# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) +# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1.252</a> (1994-09-22) +# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1.636</a> (1995-09-14) +# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1.674</a> (1995-10-13) Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 D Rule Brazil 1993 only - Jan 31 0:00 0 S Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 S +# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2.000</a> (1996-09-04) Rule Brazil 1996 only - Feb Sun>=11 0:00 0 S Rule Brazil 1996 only - Oct Sun>=1 0:00 1:00 D # From Daniel C. Sobral <dcs@gns.com.br> (1998-02-12): @@ -284,15 +321,23 @@ # to help dealing with the shortages of electric power. # # From Paul Eggert (1998-02-25): -# Reference for 1997-10-06 change: # <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm"> # Brazil Prepares for Papal Visit # </a>, # Church Net UK (1997-10-02). +# +# Decree 2.317 (1997-09-04) Rule Brazil 1997 only - Oct 6 0:00 1:00 D +# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2.495</a> +# (1998-02-10) Rule Brazil 1998 only - Mar 1 0:00 0 S -Rule Brazil 1998 max - Oct Sun>=1 0:00 1:00 D -Rule Brazil 1999 max - Feb Sun>=11 0:00 0 S +# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2.780</a> (1998-09-11) +# specifies only the 1998-10-11 and 1999-02-21 transitions; +# after that, these rules are guesses and are quite possibly wrong, +# but they are more likely than no DST at all. +Rule Brazil 1998 max - Oct Sun>=11 0:00 1:00 D +Rule Brazil 1999 max - Feb Sun>=15 0:00 0 S + # Zone NAME GMTOFF RULES FORMAT [UNTIL] # @@ -349,14 +394,20 @@ # 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). # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Chile 1918 only - Sep 1 0:00 1:00 S Rule Chile 1919 only - Jul 2 0:00 0 - Rule Chile 1927 1931 - Sep 1 0:00 1:00 S Rule Chile 1928 1932 - Apr 1 0:00 0 - -Rule Chile 1969 max - Oct Sun>=9 0:00 1:00 S +Rule Chile 1969 1997 - Oct Sun>=9 0:00 1:00 S Rule Chile 1970 max - Mar Sun>=9 0:00 0 - +Rule Chile 1998 only - Sep 27 0:00 1:00 S +Rule Chile 1999 max - Oct Sun>=9 0:00 1:00 S # IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; # (1996-09) says 1998-03-08. Ignore these for now. # Zone NAME GMTOFF RULES FORMAT [UNTIL] =================================================================== RCS file: RCS/europe,v retrieving revision 1998.8 retrieving revision 1998.8.0.1 diff -u -r1998.8 -r1998.8.0.1 --- europe 1998/09/24 14:46:11 1998.8 +++ europe 1998/09/29 19:47:13 1998.8.0.1 @@ -948,7 +948,7 @@ # Shanks gives 1921 Mar 21 for the following transition. # From Andrey A. Chernov <ache@astral.msk.su> (1993-11-12): # My sources says, that it is Mar 20, not 21. -Rule Russia 1921 only - Mar 20 23:00 2:00 DS +Rule Russia 1921 only - Mar 20 23:00 2:00 M # Midsummer Rule Russia 1921 only - Sep 1 0:00 1:00 S Rule Russia 1921 only - Oct 1 0:00 0 - # Act No.925 of the Council of Ministers of the USSR (1980-10-24): @@ -1313,19 +1313,19 @@ Rule France 1940 only - Feb 25 2:00 1:00 S # The French rules for 1941-1944 were not used in Paris, # but were used in other places (e.g. Monaco). -Rule France 1941 only - May 5 0:00 2:00 DS +Rule France 1941 only - May 5 0:00 2:00 M # Midsummer # Shanks says this transition occurred at Oct 6 1:00, # but go with Denis.Excoffier@ens.fr (1997-12-12), # who quotes the Ephemerides Astronomiques for 1998 from Bureau des Longitudes # as saying 5/10/41 22hUT. Rule France 1941 only - Oct 6 0:00 1:00 S -Rule France 1942 only - Mar 9 0:00 2:00 DS +Rule France 1942 only - Mar 9 0:00 2:00 M Rule France 1942 only - Nov 2 3:00 1:00 S -Rule France 1943 only - Mar 29 2:00 2:00 DS +Rule France 1943 only - Mar 29 2:00 2:00 M Rule France 1943 only - Oct 4 3:00 1:00 S -Rule France 1944 only - Apr 3 2:00 2:00 DS +Rule France 1944 only - Apr 3 2:00 2:00 M Rule France 1944 only - Oct 8 1:00 1:00 S -Rule France 1945 only - Apr 2 2:00 2:00 DS +Rule France 1945 only - Apr 2 2:00 2:00 M Rule France 1945 only - Sep 16 3:00 0 - # Shanks gives Mar 28 2:00 and Sep 26 3:00; # go with Excoffier's 28/3/76 0hUT and 25/9/76 23hUT. @@ -1347,16 +1347,30 @@ # Germany +# From Markus Kuhn <Markus.Kuhn@cl.cam.ac.uk> (1998-09-29): +# The German time zone web site by the Physikalisch-Technische +# Bundesanstalt contains DST information back to 1916. +# +# <a href="http://www.ptb.de/english/org/4/43/432/lega.htm"> +# Realisation of Legal Time in Germany +# </a> + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Germany 1945 only - Apr 2 2:00s 1:00 S -Rule Germany 1945 only - May 24 2:00 2:00 DS -Rule Germany 1945 only - Sep 24 3:00 1:00 S +# Shanks says 05-24 2:00 to 09-24 3:00 for DDST; go with the PTB, who quotes +# the Archiv fuer publizist. Arbeit (Munzinger-Archiv) 652 (Zeitsystem) +# (1961-11-25), which gives dates only. Guess 3:00 transition times. +Rule Germany 1945 only - May 31 3:00 2:00 M # Midsummer +Rule Germany 1945 only - Sep 23 3:00 1:00 S Rule Germany 1945 only - Nov 18 2:00s 0 - Rule Germany 1946 only - Apr 14 2:00s 1:00 S -# Whitman gives 1948 Oct 31; go with Shanks. -Rule Germany 1946 1949 - Oct Sun>=1 2:00s 0 - +# Shanks gives 1946-10-06; go with the PTB. +Rule Germany 1946 only - Oct 7 2:00s 0 - +Rule Germany 1947 1949 - Oct Sun>=1 2:00s 0 - Rule Germany 1947 only - Apr 6 2:00s 1:00 S -Rule Germany 1947 only - May 11 2:00s 2:00 DS +# The PTB gives 3:00 CET and 3:00 CEST for the midsummer transition times; +# go with Shanks. +Rule Germany 1947 only - May 11 2:00s 2:00 M Rule Germany 1947 only - Jun 29 3:00 1:00 S Rule Germany 1948 only - Apr 18 2:00s 1:00 S Rule Germany 1949 only - Apr 10 2:00s 1:00 S @@ -1898,12 +1912,12 @@ Rule Port 1940 1941 - Oct 5 23:00s 0 - Rule Port 1941 only - Apr 5 23:00s 1:00 S Rule Port 1942 1945 - Mar Sat>=8 23:00s 1:00 S -Rule Port 1942 only - Apr 25 22:00s 2:00 DS +Rule Port 1942 only - Apr 25 22:00s 2:00 M # Midsummer Rule Port 1942 only - Aug 15 22:00s 1:00 S Rule Port 1942 1945 - Oct Sat>=24 23:00s 0 - -Rule Port 1943 only - Apr 17 22:00s 2:00 DS +Rule Port 1943 only - Apr 17 22:00s 2:00 M Rule Port 1943 1945 - Aug Sat>=25 22:00s 1:00 S -Rule Port 1944 1945 - Apr Sat>=21 22:00s 2:00 DS +Rule Port 1944 1945 - Apr Sat>=21 22:00s 2:00 M Rule Port 1946 only - Apr Sat>=1 23:00s 1:00 S Rule Port 1946 only - Oct Sat>=1 23:00s 0 - Rule Port 1947 1949 - Apr Sun>=1 2:00s 1:00 S @@ -2115,9 +2129,9 @@ Rule Spain 1939 only - Apr 15 23:00s 1:00 S Rule Spain 1940 only - Mar 16 23:00s 1:00 S # Whitman says no DST 1942-1945; go with Shanks. -Rule Spain 1942 only - May 2 22:00s 2:00 DS +Rule Spain 1942 only - May 2 22:00s 2:00 M # Midsummer Rule Spain 1942 only - Sep 1 22:00s 1:00 S -Rule Spain 1943 1946 - Apr Sat>=13 22:00s 2:00 DS +Rule Spain 1943 1946 - Apr Sat>=13 22:00s 2:00 M Rule Spain 1943 only - Oct 3 22:00s 1:00 S Rule Spain 1944 only - Oct 10 22:00s 1:00 S Rule Spain 1945 only - Sep 30 1:00 1:00 S