datetime - can 2 timezone be for 1 city?

Question

I want to know if there can be 2 or more GMT timezones for one city or state. I know there can be more then one GMT timezone for a country, but not sure if it's for state and city too. Share your knowledge please.

Answer 1

I think you mean "Can one city or state span two time zones?". Yes. Mexico Beach, FL sits on the border between CST and EST with parts of the town in both time zones.

As for how you could tell a computer that, no idea.