We have a database that is currently residing in New York. We are going to be moving to another server which resides in London. This presents a problem because every date that's currently in the database the time is New York time, but after the move all new data that's created the time will be London time. We don't want users to have to remember that any date prior to the move date the time will be off by 5 hours so what we'd like to do is to have the database still on New York time despite the OS being London time. The server will be shared with other applications so the OS timezone will have to remain London time. The database will have only the data for our application. So is there a database parameter we can use to set the database time zone different from the OS time zone? The database is currently 10g but will be upgraded to 11g as part of the move.