On Sat, Apr 03, 2021 at 08:03:18AM +0000, shironeko wrote:
> see https://en.m.wikipedia.org/wiki/Tz_database

That's where I looked at (OK, without the "m" in the URL ;-)

But I still don't understand what you are up to, so it might
be we are talking past each other.

What's described there is a database format for DST rules across
all time zones, each of the latter encoded as an area/location
pair.

What we are talking about is a specifier to a time stamp to
take the ambiguity wrt the time zone this stamp is "written"
in; my point is that this area/location format mentioned there
(if /this/ is what you mean) isn't sufficient.

Cheers
 - t