Adjust to Specific Time Zone

I have a form that could be created in just about any time zone. Right now, the history shows the date/time edited in the time zone of the user who is editing it. However, because of SLAs and expectations, we need the history to be consistant in the time zone that it shows - in other words, even though I create a document at 3:22PM my time, it needs to show created at 2:22 CST. That way, if someone creates a document at 9:00 AM in California and it is acknowledged at 12:00 Noon in Houston, it only looks like it sat unacknowledged for an hour - not three hours.

I know I could always show the time zone - but the users don’t want to have to do the math - they want the time zone to ALWAYS appear in Central time. How do I do this?