WorldTimeAPI
@WorldTimeAPI

WorldTimeAPI is a simple "microservice" which returns the local-time for a given timezone in both unixtime and ISO8601 format. Some additional information is provided, such as whether that timezone is currently in Daylight Savings Time, when DST starts and ends, the UTC offset, etc.

This API was originally designed to help makers and creators of IoT devices get an initial time reference for their location, using an easy to parse data format. However, since the data is simple, free, and easy to access, there are many possibilities for non-commercial use.