Stephen Colebourne wrote:
> I also know of no source for the information, as the Olson DB won't 
> help. The only other possible source of info is CLDR, but I don't think 
> that helps either.

well there's earthtool's webservice if you need pinpoint accuracy: 
http://www.earthtools.org/webservices.htm

and i guess you could get the lat/long from google maps or one of the geocoding 
webservices (if you're in the US/Canada/Europe). or one of the place name 
databases like http://geonames.usgs.gov/domestic/index.html for the US or 
http://earth-info.nga.mil/gns/html/index.html for the rest of the world.

if you wanted something you could "control" & didn't mind fiddling around a 
bit, 
there are plenty of sources of geographic data that covers tz. for instance, 
manifold GIS: http://www.manifold.net/products/maps_and_data_home.html  you'd 
need to stuff that into a spatial database, for example postGIS (based on 
postgres) or maybe mySQL (it has new spatial stuff). after you move the tz data 
to the db, it's just a matter of a simple db query.

for something a bit coarser, icu4j provides a get tz by country via 
com.ibm.icu.util.TimeZone getAvailableIDs() method by passing in a 2-letter ISO 
country code. it seems to work well. it's based on the CLDR.

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