My Christmas is quite similar to Lexie's. I guess its because we celebrate in the middle of summer.
Anyway, its been quite a few years since anyone in my family or extended family had young children, so our christmas is quite an adult oriented affair.
We usually start opening gifts we have given each other, then with a close family breakfast at around 11am... nice and late. Breakfast consists of, well, lunch really... seafood mostly, some cold ham, all kinds of salads.
Then we come home (because we have breakfast at restaurants to avoid the cleaning up and preparation), and have a "nanna nap", where my Dad gets to sleep while the rest of us laze around watching Christmas repeats.
In mid afternoon we head over to a close friends house, where we go to the beach, play some sports... like Cricket, or just tossing the Footy around. Then later in the evening we sit around the table drinking, and being merry, while we eat the traditional turkey, and ham... but of course there is more seafood, prawns, etc.
And New Years is very informal, its all about drinking, not really the meals.