[PW] Historical time zones in the US

Mark Carson mahousu at gmail.com
Fri Aug 19 14:06:21 PDT 2016


On Fri, Aug 19, 2016 at 4:53 PM, John Cowan <cowan at ccil.org> wrote:

> On Fri, Aug 19, 2016 at 4:16 PM, Mark Carson <mahousu at gmail.com> wrote:
>
> IANA maintains a time zone database at http://www.iana.org/time-zones. T
> >
>
> That won't help for this purpose, because it merges all historical zones
> that are
> (a) in the same country and (b) have been the same since the Epoch
> (January 1, 1970).  For times older than that, it's unreliable for that
> reason.


If you look through the files, they include many comments on, and
references to, historical deviations from current time zone assignments.
These aren't necessarily reflected in the database entries themselves, of
course.


-- 
Mark Carson     mahousu at gmail.com


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