Originally Posted by
rwoman
When I've booked ex-ATL flights it was always until midnight the following night. You could always call customer service and verify.

That's what i'm looking to specify. I know if I book at 5p today, I would get until midnight tomorrow to cancel 7 + 24 = 31 hours total hold.
I'm curious whether you can really max that out by booking at 1am and getting til midnight the next day and thus getting 23 + 24 = 47 hours.
I'm afraid if I call to confirm this, they'll somehow give me less than the allotted 24+ hours (though I'm probably paranoid).