Kids up between 6.30-7am, and bring their stockings into our room to open them and eat chocolate on our bed.
Then we head downstairs to open our presents to each other and to the DC, and have "first breakfast" of coffee, croissants and brioche. Presents from other family members have to wait till we see them to be opened - so sometimes are received before or after Christmas, which I like as it spreads out the excitement a bit.
We slouch about for a couple of hours, have more coffee, enjoy our presents, watch a bit of telly. I usually start the veg prep whilst listening to Christmas carols.
Mid-morning my DM arrives and we have a second breakfast of smoked salmon bagels, bacon rolls and Buck Fizz. More presents are opened.
After that I'll probably get dressed, and start cooking. We never have a set "time" for lunch, it's ready when it's ready, usually around 2pm.
After we've eaten we slump for a bit, then FaceTime other family members to say Merry Christmas, then it's usually time for Christmas Strictly and some pudding and cheese and crackers (we never have room immediately after lunch). Mum goes home after that, and we just relax with wine and chocolate till bedtime.
We have a dog now, so for the first time will have to factor in a dog walk - I'm thinking probably between first and second breakfast.
It's a very relaxed day, because we only really have room to "host" my mum - and if we didn't she'd be on her own, so there's no pressure to invite anyone else. DH's parents are divorced and remarried, so we see them separately, either before or after Christmas, sometimes with DH's sister and her family. They're usually quite pleasant, relaxed days too - the only time we've come close to a Christmas "family row" was the one year we all tried to stay at MIL's!