title: How can I determine the IANA timezone of a specific location
body: <p>Is there a (free) webservice where I can a) give it an address (either full or city, state/province and zip), and b) get the IANA timezone of that address?</p>
  <p>Use case: I have a form where a user manages clinics. Each clinic has an address. I want to preselect that IANA timezone of that address, so that I can adjust appointment date/times associated with that clinic.</p>
  <p>I know that the Google Maps API and Bing Maps API can give me the lat/long of an address, and that there are other services that can give me the IANA TZ based on the lat/long. That said, those api's require subscriptions and keys and contracts, and it would also require a two request approach to get the single piece of data.</p>