Christmas Eve: Because of people working for at least the first half of Christmas Eve (quite normal in the UK) by the time the family had actually got together and settled in at my mothers, it was already evening, so we used to do steaks on Christmas Eve, which meant very little prep. In recent years however I have booked a restaurant and taken the family out for Christmas Eve dinner as my contribution to the hosting costs, this means, we can eat whatever we want and don't have to mess around preparing it or washing up.
Christmas Day Morning: After presents, it's a full English breakfast served with bucks fizz, this is always fun to do as you end up with two grills, toaster, 4 pans & a microwave running at once all timed to be served at the same time.
Christmas Day Dinner: We start with a fishy starter, we no longer run a separate starter and fish course as my grandma can no longer eat big multi course meals, so we combine the two and give her a small portion, Prawn, cottage cheese & avocado salad is the most common. For the main course, the meat changes year to year, Goose, Turkey, Bird O'Plenty, whatever we fancy that year, but it gets served with pigs in blankets (sausages wrapped in bacon) 2 kinds of potatoes, 3 kinds of veg (including sprouts & Parsnips) followed by Christmas Pudding. Then the traditional conversation about the cheese course and how nobody has room for it, but we'll maybe serve it later.
Boxing Day: Anything but a roast dinner, in previous years we've done duck legs, lamb shanks, wild boar stew, this t=year I'm doing venison steaks.