Some zone abbreviation(s) are not unique, and have different time offsets

Some zone abbreviations are no longer in use and provided as historical reference

Some countries and territories have more then one time zone abbreviation

This data is by no means authoritative and have to be used as reference

Additional timezone names and abbreviations are welcome via Email

A.M. and P.M. Meaning. Noon and Midnight. Converting from AM / PM to 24 hour clock.

BC and AD and BCE Meaning. Christian calendar concepts.