To display the time of day of a different time zone from the local time zone on a Web page it is necessary to perform various temporal calculations and convert local time to destination time.

If you work with GMT, UTC, Greenwich, UK time a lot - this often comes up in devops or system administration or AWS or database logs work - you get to incessantly convert between the local time, which ...

This tutorial discussed how to work with date and time in JavaScript with and without external libraries. Working with dates is always painful in almost (if not all) programming languages.