This helper API from World Weather Online can be used along with its weather API, but it also sits well on its own. The Time Zone API returns current local time and UTC offset hour and minute. There are a number of ways to search for the time zone. You can use a city/town name, postal code (US, UK and Canada), airport code, latitude/longitude and even IP address.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.