InfoPath Dev

I need to design a portion of a form where several users enter maintenance times, which usually ends up being what time zone they are in (rather than the our default Mountain time zone). I'm planning on having a read-only field where it will always convert what the user enters to Mountain time. What's the best way to do the "conversion" - an expression field?

 

E.G. - user enters 01:00 Eastern which converts to 23:00 Mountain.

 Thanks,

Brian
 

I would think an expression box would be fine.  If you have the user's default time zone somewhere or they enter it.  You may want a table that would provides your offset but if you are only going to have US users you probably can code it in your formula.