On 9/7/20 2:50 PM, Françoise Kerjouan via tz wrote:
I’m living in New Caledonia; our local government is thinking about changing time zone (from UTC +11 to UTC +12).
Yes, I saw that in the news a couple of weeks ago: https://www.rnz.co.nz/international/pacific-news/424586/new-caledonia-plans-... That proposal would change the clocks on December 1. That is not a lot of notice, and most likely you'll run into some problems with cell phones and computers not getting updated in time.
Could you please tell me how long a lead notice should be to be sure that the international community will get and process the information ?
Please see: https://data.iana.org/time-zones/tz-link.html#changes which says this: 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; see "On the Timing of Time Zone Changes"<https://codeofmatt.com/on-the-timing-of-time-zone-changes/> for examples.