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Some zone abbreviations are no longer in use and provided as historical reference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