I'm finishing a 4-day trip tomorrow that was assigned to me while on reserve where I'm scheduled to land at 2340. Also, tomorrow is the last day my scheduled reserve block of days.

If my flight is delayed (flying out of SFO so probably will be) and I don't land until Monday, then I'll be landing on a day off.

My question: is there a certain period of time I must work into Monday before UAL will restore my day off or give me the 4 hours of add pay (1 min, 1 hr, etc...)?