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Eggert mods

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SCCS-file: asia
SCCS-SID: 7.82
This commit is contained in:
Arthur David Olson
2005-04-21 15:03:17 -04:00
committed by Paul Eggert
parent fbb495b40b
commit 1c8f68d212
1 changed files with 30 additions and 9 deletions
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asia
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@ -476,12 +476,33 @@ Zone Asia/Jayapura 9:22:48 - LMT 1932 Nov
# Thursday night of Shahrivar, but I can't give exact dates....
# I have also changed the abbreviations to what is considered correct
# here in Iran, IRST for regular time and IRDT for daylight saving time.
# From Paul Eggert (2003-03-15)
#
# From Roozbeh Pournader (2005-04-05):
# The text of the Iranian law, in effect since 1925, clearly mentions
# that the true solar year is the measure, and there is no arithmetic
# leap year calculation involved. There has never been any serious
# plan to change that law....
#
# From Paul Eggert (2005-04-05):
# Go with Shanks before September 1991, and with Pournader thereafter.
# I used Ed Reingold's cal-persia in GNU Emacs 21.2 to check Persian dates.
# The Persian calendar is based on the sun, and dates after around 2050
# are approximate; stop after 2037 when 32-bit time_t's overflow.
# I used Ed Reingold's cal-persia in GNU Emacs 21.2 to check Persian dates,
# stopping after 2037 when 32-bit time_t's overflow.
# That cal-persia used Birashk's approximation, which disagrees with the solar
# calendar predictions for the year 2025, so I corrected those dates by hand.
#
# From Oscar van Vlijmen (2005-03-30), writing about future
# discrepancies between cal-persia and the Iranian calendar:
# For 2091 solar-longitude-after yields 2091-03-20 08:40:07.7 UT for
# the vernal equinox and that gets so close to 12:00 some local
# Iranian time that the definition of the correct location needs to be
# known exactly, amongst other factors. 2157 is even closer:
# 2157-03-20 08:37:15.5 UT. But the Gregorian year 2025 should give
# no interpretation problem whatsoever. By the way, another instant
# in the near future where there will be a discrepancy between
# arithmetical and astronomical Iranian calendars will be in 2058:
# vernal equinox on 2058-03-20 09:03:05.9 UT. The Java version of
# Reingold's/Dershowitz' calculator gives correctly the Gregorian date
# 2058-03-21 for 1 Farvardin 1437 (astronomical).
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Iran 1978 1980 - Mar 21 0:00 1:00 D
@ -519,10 +540,10 @@ Rule Iran 2020 only - Mar 21 0:00 1:00 D
Rule Iran 2020 only - Sep 21 0:00 0 S
Rule Iran 2021 2023 - Mar 22 0:00 1:00 D
Rule Iran 2021 2023 - Sep 22 0:00 0 S
Rule Iran 2024 2025 - Mar 21 0:00 1:00 D
Rule Iran 2024 2025 - Sep 21 0:00 0 S
Rule Iran 2026 2027 - Mar 22 0:00 1:00 D
Rule Iran 2026 2027 - Sep 22 0:00 0 S
Rule Iran 2024 only - Mar 21 0:00 1:00 D
Rule Iran 2024 only - Sep 21 0:00 0 S
Rule Iran 2025 2027 - Mar 22 0:00 1:00 D
Rule Iran 2025 2027 - Sep 22 0:00 0 S
Rule Iran 2028 2029 - Mar 21 0:00 1:00 D
Rule Iran 2028 2029 - Sep 21 0:00 0 S
Rule Iran 2030 2031 - Mar 22 0:00 1:00 D