* NEWS: Document this. * asia (Iran): Predict 2038 and later DST to be March 21 thru Sept. 21. This is not correct, but it's better than predicting no DST. --- NEWS | 6 ++++++ asia | 11 +++++++++-- 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/NEWS b/NEWS index b4e1483..121e0e4 100644 --- a/NEWS +++ b/NEWS @@ -11,6 +11,12 @@ Unreleased, experimental changes America/Metlakatla switched from PST all year to AKST/AKDT on 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.) + Changes affecting future time stamps + + Asia/Tehran now has DST predictions for the year 2038 and later, + to be March 21 00:00 to September 21 00:00. This is likely better + than predicting no DST, albeit off by a day every now and then. + Changes affecting documentation tz-link.htm mentions the BDE library (thanks to Andrew Paprocki). diff --git a/asia b/asia index 5467024..f170244 100644 --- a/asia +++ b/asia @@ -1084,8 +1084,15 @@ Rule Iran 2032 2033 - Mar 21 0:00 1:00 D Rule Iran 2032 2033 - Sep 21 0:00 0 S Rule Iran 2034 2035 - Mar 22 0:00 1:00 D Rule Iran 2034 2035 - Sep 22 0:00 0 S -Rule Iran 2036 2037 - Mar 21 0:00 1:00 D -Rule Iran 2036 2037 - Sep 21 0:00 0 S +# +# The following rules are approximations starting in the year 2038. +# These are the best post-2037 approximations available, given the +# restrictions of a single rule using a Gregorian-based data format. +# At some point this table will need to be extended, though quite +# possibly Iran will change the rules first. +Rule Iran 2036 max - Mar 21 0:00 1:00 D +Rule Iran 2036 max - Sep 21 0:00 0 S + # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Tehran 3:25:44 - LMT 1916 3:25:44 - TMT 1946 # Tehran Mean Time -- 2.5.0