[tz] [PATCH] Revert recent pre-1970 changes.

Guy Harris guy at alum.mit.edu
Mon Sep 2 05:44:29 UTC 2013

On Sep 1, 2013, at 12:57 AM, Lester Caine <lester at lsces.co.uk> wrote:

> Paul Eggert wrote:
>> Stephen Colebourne wrote:
>>> >The Theory change reinstates the one zone per ISO-3166
>>> >region requirement.
>> I'm afraid that's incorrect.  That change would strengthen
>> the requirement beyond what it ever was, by requiring a Zone
>> to be present for every country.  That has never been
>> required and has never been the practice in the tz database.
> Since the ISO-3166-1 code table is a reasonably well used base for most geographical activity, at some point timezones are required to match each.

There is no necessarily a single tzdb zone for a given entity that has an ISO 3166 code.  (Two immediately obvious counterexamples - the entities with the ISO 3166 codes "US" and "CA".)

So do you mean that there do not exist - or, at least, *should* not exist - any tzdb zones that apply to more than one entity with a given ISO 3166 code?

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