How to look up historical time zones by date and location

[Denis McMahon]

On Tue, 19 Aug 2014 10:25:58 -0600, Ian Kelly wrote:

> We might be able to be more helpful if you would be more clear about
> what problem it is that you are trying to solve. Are you trying, for a
> given point on the Earth, to determine what nautical time zone it falls
> into, or some other "natural" time zone, or its LMT offset, or something
> else? For any of those cases, I think the Olson database of *legal* time
> zones is not going to be very useful. It would probably be better to
> obtain the longitude and do the calculation yourself.

Agreed, if OP wishes to insist that time is defined solely by longitude, 
then his best bet is to look up the longitude of the point in question on 
google maps and calculate his UTC time zone offset from that at 240 
seconds of time per degree longitude.

But Urumqi seems to be almost 83 seconds wide in astronomical time terms, 
so does he want West Urumqi time, Central Urumqi time or East Urumqi time?

-- 
Denis McMahon, denismfmcmahon at gmail.com