On 22/03/2023 16:59, Jim Pennino wrote:
DST is NOT controlled by ntp, but rather your operating system's time
zone file.
Furthermore, Debian Linux has the correct rules:
TZ=Asia/Tehran date; TZ=UTC date
Wed 22 Mar 20:48:32 +0330 2023
Wed 22 Mar 17:18:32 UTC 2023
and so has the IANA master copy of the database
<https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz> (file:
asia):
Rule Iran 2017 2019 - Mar 21 24:00 1:00 -
Rule Iran 2017 2019 - Sep 21 24:00 0 -
Rule Iran 2020 only - Mar 20 24:00 1:00 -
Rule Iran 2020 only - Sep 20 24:00 0 -
Rule Iran 2021 2022 - Mar 21 24:00 1:00 -
Rule Iran 2021 2022 - Sep 21 24:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Tehran 3:25:44 - LMT 1916
3:25:44 - TMT 1935 Jun 13 # Tehran Mean Time
3:30 Iran +0330/+0430 1977 Oct 20 24:00
4:00 Iran +04/+05 1979
3:30 Iran +0330/+0430
This says the current standard offset from UTC was three and a half
hours, since 1979, the last change was to no additional offset from
that, and was at midnight on September 21 2021, and no future changes
are known.
I wonder if this could be the result of an embargo, implemented by
either Iran on the USA? At least for open source software, the latter
should not be an issue, as it can be obtained from other countries.
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