[tz] Fw:Time Zone Iran

[Paul Eggert]

On 2023-03-26 23:39, Patrick.Stergonschegg at orf.at wrote:

> Hello,
> 
> 
> I just noticed that the Windows time zone for "UTC +03:30 Tehran" is probably being computed incorrectly.
> 
> 
> It seems that DST +1 is being added, although Iranian Government announced that they will not switch to DST anymore, beginning in 2023.
> 
> 
> Official IR News Agency announcement: http://irna.ir/xjJ3TT
> 
> Current Time: https://time.ir
> 
> 
> I assume that Microsoft imports IANA time zone data: http://bit.ly/3ZmGzTE
> 
> 
> In the file tzdata2023b\asia on line 1625 it says:
> 
> 3:30 Iran +0330/+0430
> 
> 
> I assume the line should be changed and a new line should be added, e.g.:
> 
> 3:30 Iran +0330/+0430 2022
> 
> 3:30 - +0330

I don't see a need for such a change, as the "Iran" rules end this way:

   Rule Iran 2021 2022 - Mar 21 24:00 1:00 -
   Rule Iran 2021 2022 - Sep 21 24:00 0    -

The shell command 'zdump -i -c 2021,2030 Asia/Tehran' outputs this:

	TZ="Asia/Tehran"
	-	-	+0330
	2021-03-22	01	+0430		1
	2021-09-21	23	+0330
	2022-03-22	01	+0430		1
	2022-09-21	23	+0330

which looks OK: it stops after 2022.

If your MS-Windows host disagrees, perhaps you need to update its 
tables. I don't know how that works, though.

> 
> More ressources:
> 
> http://bit.ly/3lQC9qp
> 
> https://www.timeanddate.com/worldclock/iran
> 
> 
> I am looking forward to any feedback.
> 
> 
> Thanks a lot,
> Patrick
> 
>