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.

Adding time zone information to PlainDateTime is equivalent to ZonedDateTime. Additionally, the ' Temporal.Now ' object provides a number of methods to obtain the current time in various formats.

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.