ata Commons
Open Database License</a>. The borders appear to be quite accurate.
Its main web page lists more than twenty libraries
for looking up a timezone name from a GPS coordinate.</li>
<li>Free access via a network API, if you register a key, is provided by
the <a
href="https://www.geonames.org/export/web-services.html#timezone">GeoNames
Timezone web service</a>, the <a
href="https://developers.google.com/maps/documentation/timezone/intro">Google
Maps Time Zone API</a>, and
the <a href="https://timezon