[tz] (no subject)

dpatte dpatte at relativedata.com
Tue Sep 21 22:48:25 UTC 2021

Perhaps current timekeeping does need it, but historical time based research does, and that is our point.Sent from my Galaxy
-------- Original message --------From: Paul Eggert via tz <tz at iana.org> Date: 2021-09-21  17:13  (GMT-05:00) To: Stephen Colebourne <scolebourne at joda.org> Cc: Time Zone Mailing List <tz at iana.org> Subject: Re: [tz] On 9/21/21 1:20 PM, Stephen Colebourne via tz wrote:> Straw man. Literally no one has suggested this.Yes, of course it's a straw argument. That's the point.Although it'd be technically possible to require a Zone for each state and province in the world, it's not necessary, it would consume maintenance resources that are better spent elsewhere, and Zone proliferation would make things unnecessarily complicated for users. The situation for countries is similar. Admittedly there are few countries than states+provinces, but logically there's no difference between the two cases.> If you don't like ISO countries as the basis of a rule, feel free to> suggest something else.My suggestion is to stick with the rules already in theory.html. They've worked well over the years.> If you want to resolve the issue you need a rule that doesn't end up> with users in Norway or Sweden requesting the time-zone for 1950 and> getting the zone information of Germany instead.If that's the idea, then I also need a rule that doesn't end up with users in Munich requesting the time zone for September 20, 1945 and getting the UTC offset of Berlin instead. The case for a Munich Zone is even stronger than the case for an Oslo Zone, as Munich has a lot more people (and more tzdb users) than Oslo does.Of course this is a straw argument too; that's the point. All this stuff about pre-1970 timestamps is out of scope for tzdb proper, and it's always been out of scope.Only politics would require us to have a Zone for every ISO country. Timekeeping needs don't require it. Admittedly we used to have more Zones, but we've never had a Zone for every ISO country and no timekeeping need for such a rule has ever been demonstrated.
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