Iran DST change cancelled and step to avoid DST changing in their Linux system
Hi Team, Customer running with Asia/Tehran (+0330, +0330) timezone, where Daylight saying is cancelled by their Iran government recently. Our Operator are requesting to avoid DST changing in their Linux system and expect tzdata patch from IANA (or) if possible any workaround to avoid this DST change in their systems. Thanks and Regards, S Sathish S
On 3/16/22 06:17, S Sathish S via tz wrote:
Customer running with Asia/Tehran (+0330, +0330) timezone, where Daylight saying is cancelled by their Iran government recently.
As I understand it, this decision is not final, so we haven't updated TZDB, although we plan to do so if and when it becomes final.
Our Operator are requesting to avoid DST changing in their Linux system and expect tzdata patch from IANA (or) if possible any workaround to avoid this DST change in their systems.
If Iran's rules are changed and you're running a POSIX-compatible system whose TZDB instance has not been updated accordingly, you can work around some of the problem by using the time zone setting '<+0330>-3:30' instead of 'Asia/Tehran'. You can do this for a particular process by setting TZ='<+0330>-3:30' in the process's environment. To change the time zone globally you'll need to consult your system's documentation; for example, on the Fedora-based system that I'm typing this message on, the shell command: timedatectl set-timezone '<+0330>-3:30' alters the /etc/localtime symbolic link to set the default time zone for processes that do not set TZ. Unfortunately, using '<+0330>-3:30' mishandles some older timestamps and it might not work on non-POSIX systems. So a better fix will be to update TZDB.
Hi Paul/Team, Thanks for quick response . Today we have seen latest tzdata2022a whether you have in-scoped " Daylight saying cancelled in Iran" can you confirm us. Thanks and Regards, S Sathish S -----Original Message----- From: Paul Eggert <eggert@cs.ucla.edu> Sent: Thursday, March 17, 2022 12:41 AM To: S Sathish S <s.s.sathish@ericsson.com> Cc: M Venkata Pratap M <m.m.venkata.pratap@ericsson.com>; Gunalan Ranjan S <gunalan.ranjan@globallogic.com>; Madhankumar Muthuraj <mathankumar.m@globallogic.com>; Time Zone Mailing List <tz@iana.org> Subject: Re: [tz] Iran DST change cancelled and step to avoid DST changing in their Linux system On 3/16/22 06:17, S Sathish S via tz wrote:
Customer running with Asia/Tehran (+0330, +0330) timezone, where Daylight saying is cancelled by their Iran government recently.
As I understand it, this decision is not final, so we haven't updated TZDB, although we plan to do so if and when it becomes final.
Our Operator are requesting to avoid DST changing in their Linux system and expect tzdata patch from IANA (or) if possible any workaround to avoid this DST change in their systems.
If Iran's rules are changed and you're running a POSIX-compatible system whose TZDB instance has not been updated accordingly, you can work around some of the problem by using the time zone setting '<+0330>-3:30' instead of 'Asia/Tehran'. You can do this for a particular process by setting TZ='<+0330>-3:30' in the process's environment. To change the time zone globally you'll need to consult your system's documentation; for example, on the Fedora-based system that I'm typing this message on, the shell command: timedatectl set-timezone '<+0330>-3:30' alters the /etc/localtime symbolic link to set the default time zone for processes that do not set TZ. Unfortunately, using '<+0330>-3:30' mishandles some older timestamps and it might not work on non-POSIX systems. So a better fix will be to update TZDB.
On 3/16/22 23:08, S Sathish S wrote:
Today we have seen latest tzdata2022a whether you have in-scoped " Daylight saying cancelled in Iran" can you confirm us.
2022a contains no changes for Iran. As I understand it, the Iranian government has not made a final decision. If and when it decides to change the rules, we'll need a followup release.
On 17/03/2022 06:08, S Sathish S via tz wrote:
Today we have seen latest tzdata2022a whether you have in-scoped " Daylight saying cancelled in Iran" can you confirm us.
tzdata2022a (and earlier) does not include any change relating to the possible cancellation of daylight savings time in Iran. The changes in the 2022a release of tz code and data are listed in the NEWS file and in the announcement email: http://mm.icann.org/pipermail/tz-announce/2022-March/000070.html Paul will prepare a new release if it becomes necessary to incorporate the proposed change; see: http://mm.icann.org/pipermail/tz/2022-March/031296.html -- -=( Ian Abbott <abbotti@mev.co.uk> || MEV Ltd. is a company )=- -=( registered in England & Wales. Regd. number: 02862268. )=- -=( Regd. addr.: S11 & 12 Building 67, Europa Business Park, )=- -=( Bird Hall Lane, STOCKPORT, SK3 0XA, UK. || www.mev.co.uk )=-
participants (3)
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Ian Abbott -
Paul Eggert -
S Sathish S