Normally winning coaches get a cooler of Gatorade dumped over their heads, but Duke's Mayo offered a donation to charity if the winning coach was doused with mayo instead. Both coaches have accepted the offer, so unless one backs out, it should be a guarantee.
The game is on Thursday, December 30, and kicks off at 11:30 AM Eastern Time. If you're not familiar with college football, games typically last around 3 1/2 to 4 hours, so the mayonnaise bath would be estimated to occur around 3:00 PM to 3:30 PM, Eastern Time, unless the game goes into overtime.