[tz] Lack of "initial" transitions for some zones

Lester Caine lester at lsces.co.uk
Tue Jul 21 18:30:59 UTC 2015

On 21/07/15 19:19, Jon Skeet wrote:
> Given the existing caveats about "don't trust that values before 1970
> are historically accurate" I think it's reasonable to simply assume
> standard time before then, isn't it? Having said that, WET and EET are
> somewhat interesting in that their first transitions are in 1977 - so
> after the "accuracy watershed" so to speak. That does complicate things
> somewhat.

And some of the others have additional historic data in the 'back' file
so that while a truncated TZ file has a common start offset, switching
to include all the available data broadens that selection.

Lester Caine - G8HFL
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