Does anyone know how to do this the ASP way?

What I want to do in my site is to display each registered user their own time zone. Say, my place now would be Friday 17:30, and swagner would be Thursday 04:30.
During the registration process, I have allow the user to select their own time zone and later saved it into the database.
I will have a member list page to display all this registered user in a list format. At the end of each field, I will display this information so that I know what is the real time for each of my member list

Any guide
Cheers and merry Christmas.