[tz] Dealing with Pre-1970 Data
eggert at cs.ucla.edu
Sun Sep 1 04:49:51 UTC 2013
Guy Harris wrote:
> The first suggestion is what I think Zefram was suggesting;
> the second suggestion sounds like what you're suggesting.
Yes, that sounds about right.
> Is that intended to reduce the number of zones to present
> to someone configuring the system if your system doesn't
> make a vigorous effort to support those times, and to
> reduce the effort needed to maintain them?
Yes to both. The extra zones are a burden to users
and to maintainers, and for most users their cost exceeds
> Is it intended to be consistent with a rule forbidding
> adding *new* tzids due to differences in pre-1970
> standardized time?
Yes. That rule's from "Theory".
> Is it intended to reduce political disputes over tzids -
> presumably by reducing the number of tzids and thus the
> number of possible points of complaint,
Yes, that's part of it. But more important, it reduces
the number of zones put in only because a location is
politically "special" in some way.
> I went back through the archive and, if the controversial
> changes are the ones from the "Move links to 'backward' if
> they exist only because of country codes." message, I'm
> probably missing something, as that doesn't appear to be
> discarding existing pre-1970 splits, at least from the
You're correct, those changes don't discard existing
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