Time Zone Converter

Hello. I need to convert a date/time and I am having a hard time figuring out how to do it. I want to convert from one time zone to another but I need to make it possible to convert from any timezone to any time zone. Do your applications use java to do your conversions? Can you put me in the right direction to figure out how to do it? I would really appreciate any help you can give me. Thank you. Gina Carollo gcarollo@crowechizek.com