Search:

Probably. Like I said, for questions like that, google is your friend. We would just be doing the googling for you, which isn't smart because you know your requirements better than we do.

The short answer to your question is: no, there isn't an easy way to do this.

You're going to need to rely on a webservice that gives you the timezone for a given city, or a data structure that...

Do you know how you would do this without a program? As in, if you had to do this using only a piece of paper and a pencil (and whatever other resource), would you know how?

If so, write out what...