Convert GMT time on the report/universe to PST time

Hello all,

Really appreciate any help on this issue.

My reports are giving output on GMT based off the server machine configuration. I need to create a variable at the report level to covert the time to PST

for eg. if its Sep 8, 2010 05:20:00 PM i want to create a variable to convert this to PST and show it as Sep 8, 2010 10:20:00 AM (-7 hrs).

Or need some help to make a object at the universe itself.