As for my birthday (Tuesday, December 23rd), my current plan is to follow the tentative schedule listed below, which is based on approximate lengths of the movies:
6:15 A.M. - X-Men
8:00 A.M. - X2: X-Men United
10:15 A.M - X-Men: The Last Stand (Yes, I'm going to watch it despite how much I hate it.)
Noon - Lunch - Taco bar
1:00 P.M. - X-Men Origins: Wolverine
2:45 P.M. - X-Men: First Class
5 P.M. - Dinner (we may order and pick up pizza)
5:30 P.M. - The Wolverine
7:30 P.M. - X-Men: Days of Future Past
9:40 P.M. - Finish