[tz] Proposal: validation text file with releases

[Jon Skeet]

I'd be happy with that behaviour, yes. I don't know how to extract it from
the current zdump output though (or indeed any transitions before 1900).

Jon


On 19 July 2015 at 01:54, Howard Hinnant <howard.hinnant at gmail.com> wrote:

> On Jul 18, 2015, at 6:25 PM, Paul Eggert <eggert at cs.ucla.edu> wrote:
> >
> > Jon Skeet wrote:
> >> In Noda Time, if I don't find a rule leading "into" the  transition
> period, I take the name of the first rule with no daylight savings.
> >> zic appears to implement equivalent behaviour
> >
> > Yes, that's the intent.
>
> I’ve updated my parser with this behavior:
>
>
> https://github.com/HowardHinnant/date/commit/618cd7be060b02a923af60c0eb866a6cbd630a96
>
> And here is the updated validation file for 2015e:
>
> http://howardhinnant.github.io/tzdata2015e-tzvalidate.txt.zip
>
> The only difference I’m now seeing from Jon’s:
>
> http://nodatime.org/tzvalidate/tzdata2015e-tzvalidate.zip
>
> is associated with years 1904 and prior, which Jon has already explained.
>
> Thanks Jon and Paul for the explanation of the lookup rules for when one
> "falls off the front.”
>
> I have one suggestion for the validation file:
>
> Some timezones have no transition period and are labeled like so:
>
> EST
> Fixed: -05:00:00 EST
>
> My recommendation is to change this to:
>
> EST
> Initially:           -05:00:00 standard EST
>
> And furthermore have every timezone do this.  For example:
>
> Europe/Amsterdam
> Initially:           +00:19:32 standard LMT
> 1834-12-31T23:40:28Z +00:19:32 standard AMT
> 1916-04-30T23:40:28Z +01:19:32 daylight NST
> ...
>
> instead of:
>
> Europe/Amsterdam
> 1834-12-31T23:40:28Z +00:19:32 standard AMT
> 1916-04-30T23:40:28Z +01:19:32 daylight NST
> ...
>
> Howard
>
>
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