diff options
Diffstat (limited to 'backward')
| -rw-r--r-- | backward | 54 |
1 files changed, 49 insertions, 5 deletions
@@ -15,7 +15,8 @@ # typically use this file for backward compatibility. # This file is divided into sections, one for each major reason for a -# backward compatibility link. Each section is sorted by link name. +# backward compatibility link or zone. Each section of links is +# sorted by name. # A "#= TARGET1" comment labels each link inserted only because some # .zi parsers (including tzcode through 2022e) mishandle links to links. @@ -46,7 +47,6 @@ Link America/Noronha Brazil/DeNoronha Link America/Sao_Paulo Brazil/East Link America/Manaus Brazil/West Link Europe/Brussels CET -Link America/Chicago CST6CDT Link America/Halifax Canada/Atlantic Link America/Winnipeg Canada/Central # This line is commented out, as the name exceeded the 14-character limit @@ -63,7 +63,6 @@ Link Pacific/Easter Chile/EasterIsland Link America/Havana Cuba Link Europe/Athens EET Link America/Panama EST -Link America/New_York EST5EDT Link Africa/Cairo Egypt Link Europe/Dublin Eire # Vanguard section, for most .zi parsers. @@ -104,7 +103,6 @@ Link Pacific/Kwajalein Kwajalein Link Africa/Tripoli Libya Link Europe/Brussels MET Link America/Phoenix MST -Link America/Denver MST7MDT Link America/Tijuana Mexico/BajaNorte Link America/Mazatlan Mexico/BajaSur Link America/Mexico_City Mexico/General @@ -326,6 +324,52 @@ Link Europe/Kyiv Europe/Kiev # However, for various reasons many users expect to find it under Europe. Link Asia/Nicosia Europe/Nicosia Link Pacific/Honolulu HST -Link America/Los_Angeles PST8PDT Link Pacific/Guadalcanal Pacific/Ponape #= Pacific/Pohnpei Link Pacific/Port_Moresby Pacific/Truk #= Pacific/Chuuk + + +# The backward-compatibility zones PST8PDT, MST7MDT, CST6CDT, and EST5EDT + +# Near-copy of US rules in the northamerica file, +# so that this file can be compiled separately. +# To conform to POSIX, this copy uses D instead of W for War and P for Peace. +# Rule NAME FROM TO - IN ON AT SAVE LETTER/S +Rule USback 1918 1919 - Mar lastSun 2:00 1:00 D +Rule USback 1918 1919 - Oct lastSun 2:00 0 S +Rule USback 1942 only - Feb 9 2:00 1:00 D # War +Rule USback 1945 only - Aug 14 23:00u 1:00 D # Peace +Rule USback 1945 only - Sep 30 2:00 0 S +Rule USback 1967 2006 - Oct lastSun 2:00 0 S +Rule USback 1967 1973 - Apr lastSun 2:00 1:00 D +Rule USback 1974 only - Jan 6 2:00 1:00 D +Rule USback 1975 only - Feb lastSun 2:00 1:00 D +Rule USback 1976 1986 - Apr lastSun 2:00 1:00 D +Rule USback 1987 2006 - Apr Sun>=1 2:00 1:00 D +Rule USback 2007 max - Mar Sun>=8 2:00 1:00 D +Rule USback 2007 max - Nov Sun>=1 2:00 0 S + +# From Arthur David Olson (2005-12-19): +# We generate the files specified below to guard against old files with +# obsolete information being left in the time zone binary directory. +# We limit the list to names that have appeared in previous versions of +# this time zone package. +# We do these as separate Zones rather than as Links to avoid problems if +# a particular place changes whether it observes DST. +# +# From Paul Eggert (2026-07-24): +# These zones are for backward compatibility with Unix System V (1983). +# They are ahistorical, in that they pretend standard time extends +# backward indefinitely into the past. +# They use USback (not US) rules so that they conform to POSIX instead +# of using abbreviations like EWT for Eastern War Time during World War II. +# The zones are here, not in the northamerica file, to lessen +# confusion downstream by making it clear that the zones are present +# only for backward compatibility. +# New software should use settings like TZ='America/New_York' instead +# of these backwards-compatibility zones. +# +# Zone NAME STDOFF RULES FORMAT [UNTIL] +Zone PST8PDT -8:00 USback P%sT +Zone MST7MDT -7:00 USback M%sT +Zone CST6CDT -6:00 USback C%sT +Zone EST5EDT -5:00 USback E%sT |