For the past 10 years we've had our Christmas meal early evening on Christmas Eve.
I started this after my eldest's 2nd Christmas, when I complained to my boss that I missed so much of him playing with his toys because I was stuck in the kitchen. He mentioned that when his 3 were little they ate Christmas Eve leaving Christmas Day free for both of them to play with kids.
I haven't looked back since, my mum in law comes around, we eat about 6.00ish with 3 or 4 courses, the kids are allowed to choose a present from under the tree, this year one of them got Singstar which proved to be bags of fun and ended up with the kids not going to bed until about midnight, at which point they both fell asleep straight away right through until 8.00 Christmas morning - perfect.
On Christmas Day we had cold turkey, microwave chips, chocolate and paper plates, which means I get a Christmas break too