Oh, geez, Andrea...do you have to ask the hard questions!?? LOL....
I thikn you're going to have to plan to get all your purchases in within 23 hours JUST TO MAKE SURE, I'm not sure with the daylight savings time how it will work.
BUT I suspect that everyone's going to be done bidding well before even 12 hours. Unless we have some stragglers who couldn't make it at swap open time.
I'm sorry I really can't give you a definitive answer, but next time I think I'll schedule it NOT on Daylight Savings time Weekend! :D