Cannot remember
but I was never an early riser as a child .
We had presents in a pillowcase at the end of the bed so probably when my older DSis woke then I'd open my presents .
I was born in '66 so Christmases were very low key ( and my DMum never liked the bother of Christmas anyway ).
I have always made Christmas a bigger deal for my DC so the Christmas Eve Traditions , the stockings in their room, days out ,
They're adults now .....I predict a wake-up maybe 10am for them 