[tz] Issues with pre-1970 information in TZDB
eggert at cs.ucla.edu
Thu Sep 23 17:06:04 UTC 2021
On 9/22/21 12:51 PM, Tom Lane via tz wrote:
> From my perspective, it'd have been better or at least more honest
> if the moved zones had disappeared from the TZif tree altogether.
That's what we did long ago, but as I vaguely recall there was
resistance to removing data. Hence 'backzone', which is not part of the
default database, and which contains data that's unnecessary according
to the current guidelines, data that are often of lower quality.
The current disagreement is mostly over whether part of 'backzone' is
necessary. There is an argument that some (but not all) of the
'backzone' data is necessary in order to accommodate certain political
concerns, and that the guidelines should be altered to say that these
political concerns are enough to justify Zones that would not otherwise
be needed. I'm skeptical of that argument, partly because that means
there'll be more low-quality data in the database, partly because it
means more work for us and for our users for essentially zero benefit,
and partly because the more we entangle tzdb with politics the more time
we'll waste in political debates.
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