Hello All I want to ask about references, countries can change their time zone depending on, I want name of standards, guidelines if any. Regards Samah Kareem
There are no formal standards. Countries do as they please, when they please, with any amount of notice. There are guidelines — please give us lots of notice of planned changes— but many countries do not follow them. On Tue, Jan 29, 2019 at 23:46 Samah Kareem <samahkareem2012@gmail.com> wrote:
Hello All I want to ask about references, countries can change their time zone depending on, I want name of standards, guidelines if any.
Regards Samah Kareem
-- Jonathan Leffler <jonathan.leffler@gmail.com> #include <disclaimer.h> Guardian of DBD::Informix - v2018.1031 - http://dbi.perl.org "Blessed are we who can laugh at ourselves, for we shall never cease to be amused."
The guideline given here: https://data.iana.org/time-zones/tz-link.html says: 'If your government plans to change its time zone boundaries or daylight saving rules, inform tz@iana.org well in advance, as this will coordinate updates to many cell phones, computers, and other devices around the world. With less than a year's notice there is a good chance that some computer-based clocks will operate incorrectly after the change, due to delays in propagating updates to software and data. The shorter the notice, the more likely clock problems will arise....' This is good advice. For more, please see "On the Timing of Time Zone Changes", here: https://codeofmatt.com/on-the-timing-of-time-zone-changes/
participants (3)
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Jonathan Leffler -
Paul Eggert -
Samah Kareem