you can get that with `zdump -v Asia/Tehran`: Asia/Tehran Mon Mar 21 19:29:59 1977 UT = Mon Mar 21 22:59:59 1977 +0330 isdst=0 gmtoff=12600 Asia/Tehran Mon Mar 21 19:30:00 1977 UT = Tue Mar 22 00:00:00 1977 +0430 isdst=1 gmtoff=16200 Asia/Tehran Thu Oct 20 19:29:59 1977 UT = Thu Oct 20 23:59:59 1977 +0430 isdst=1 gmtoff=16200 Asia/Tehran Thu Oct 20 19:30:00 1977 UT = Thu Oct 20 23:30:00 1977 +04 isdst=0 gmtoff=14400 Asia/Tehran Fri Mar 24 19:59:59 1978 UT = Fri Mar 24 23:59:59 1978 +04 isdst=0 gmtoff=14400 Asia/Tehran Fri Mar 24 20:00:00 1978 UT = Sat Mar 25 01:00:00 1978 +05 isdst=1 gmtoff=18000 Asia/Tehran Fri Aug 4 19:59:59 1978 UT = Sat Aug 5 00:59:59 1978 +05 isdst=1 gmtoff=18000 Asia/Tehran Fri Aug 4 20:00:00 1978 UT = Sat Aug 5 00:00:00 1978 +04 isdst=0 gmtoff=14400 Asia/Tehran Sun Dec 31 19:59:59 1978 UT = Sun Dec 31 23:59:59 1978 +04 isdst=0 gmtoff=14400 Asia/Tehran Sun Dec 31 20:00:00 1978 UT = Sun Dec 31 23:30:00 1978 +0330 isdst=0 gmtoff=12600 Asia/Tehran Sat May 26 20:29:59 1979 UT = Sat May 26 23:59:59 1979 +0330 isdst=0 gmtoff=12600 Asia/Tehran Sat May 26 20:30:00 1979 UT = Sun May 27 01:00:00 1979 +0430 isdst=1 gmtoff=16200 Asia/Tehran Tue Sep 18 19:29:59 1979 UT = Tue Sep 18 23:59:59 1979 +0430 isdst=1 gmtoff=16200 Asia/Tehran Tue Sep 18 19:30:00 1979 UT = Tue Sep 18 23:00:00 1979 +0330 isdst=0 gmtoff=12600 Asia/Tehran Thu Mar 20 20:29:59 1980 UT = Thu Mar 20 23:59:59 1980 +0330 isdst=0 gmtoff=12600 Asia/Tehran Thu Mar 20 20:30:00 1980 UT = Fri Mar 21 01:00:00 1980 +0430 isdst=1 gmtoff=16200 Asia/Tehran Mon Sep 22 19:29:59 1980 UT = Mon Sep 22 23:59:59 1980 +0430 isdst=1 gmtoff=16200 Asia/Tehran Mon Sep 22 19:30:00 1980 UT = Mon Sep 22 23:00:00 1980 +0330 isdst=0 gmtoff=12600
On Tue, Mar 18, 2025 at 7:13 AM Roozbeh Pournader via tz <tz@iana.org> wrote: > > Can someone please kindly give me a dump of Asia/Tehran changes according to > the latest tzdata for the years 1977-1981? > > I'm trying to piece together the newspaper bits and pieces and compare with > the tz database, and it seems that there is clearly some transitions missing. > Specifically, I find the following lines confusing: > > 4:00 Iran %z 1979 > 3:30 Iran %z > > Does that mean we think Iran switched from UTC+4:00 to UTC+3:30 on Jan 1, > 1979? > > Thanks a lot, > Roozbeh >
