Curious if anyone knows what time zone "The Computer" that issues tickets "lives" in? Frequently I book at 1:00 or 2:00 AM EDT or EST, but ticket reflects pre-midnight date. For example, I booked at 1:18 AM this morning (8/17/2011), and receipt and itinerary clearly state booking date 8/16/2011. I have called DM desk three times and I get the same answer--"The Computer" operates on USA Eastern Time zone. No one can explain why my ticket reflects yesterday's date. If the reader asks why I care, it is because of cancellation deadline of 23:00 the day after ticketing. I frequently need to make plans and then cancel or change due to work conflicts that turn up when coordinating with colleagues. It is helpful to book AFTER the date change and thereby buy a little time.

Perhaps is actually happening in SLC vs. ATL (what agent told me), which would add two hours?

Thanks