Yes, it will. We went last year Christmas Day but we were there over an hour before park opening (rope drop) and had a good touring plan. We usually go during the off season (just got back a few weeks ago) but Christmas was still enjoyable. If you’re going for the first time over the holidays know it’s going to be crazy busy and go with the flow. People who go over the holidays and don’t know what they’re doing are the ones who say how terrible it is and they never want to go back. Then there’s fanatics like me who had a great experience and go back year after year. We are only one day before the bowl game knowing it’s going to be busy but I can’t be in Orlando and not go to Disney! Did Universal a few weeks ago also, definitely would need the express pass over the holidays and park to park to do all the Harry Potter. It is also $$$$!