I think last year it was something ridiculous like 5am. So, this year I have devised a cunning plan to stay in bed longer.
I am next to useless before my morning coffee so I am taking a flask up to bed (inspired by a thread here on LP) and putting ds's stocking in his room instead of downstairs so he can come into my bed to open it whilst I slowly come alive.
The best bit though is that I have individually wrapped all the crappy little bits and pieces so it takes him longer to open. 