As others have reported, Priceline will make no accommodation or changes under any circumstances. I had booked a hotel room for a Tue night but, due to an injury by a family member, needed to push the reservation back by two nights, to Thursday. My request for a date change was denied. I was even willing to stay at a cheaper hotel, but Priceline would make no concessions, so I paid for a hotel night that I could not use.