We give out our presents. I'm Icelandic, and like most other European countries actually, present giving is on Christmas Eve. Don't really know why. But I like doing it, and they get Santa's present (or for DD1, the main present) on Christmas because we live in the UK.
This year, I'll probably be sorting out the food, as in the food which can't be cooked next day. Again, not the normal food. It's mainly fishy. Last year, DS put 'a turkey not any fish' on his Christmas list. It's mainly herring because that seems to be Iceland's staple food. Little herring things everywhere, then stored etc;
We watch some Christmas films. Those really, really annoying, cheesy films which I actually love to watch. Then we'll be going down to the village church hall where they'll be having a little meet-up thing, a very small amount of people as its a hamlet in the middle of nowhere, and the DCs will be forced to play a party game or two and pull crackers before Christmas Day. Then they'll moan because they didn't get the little toy which they wanted.
Then we go home. I drink wine, DH drinks apple juice and the DCs drink hot chocolate.
All the time, try and make sure my family are feeling happy. Also try to make sure my 87yr old DGM isn't speaking Icelandic to the poor pub owner who usually gives her some non-alcoholic drink to be on the safe side and then I have to rush out to pay him because DGM only has kroner in her purse.
That up there ^^ probably isn't a tradition you want to start though.
By that time, it's about 6:30. We open the Christmas pyjamas for DS, and we take him up to bed. Then we all take a turn to read a line of his new Christmas book, which can be a problem for DGM who doesn't read or understand English, and will be more of a problem because this year we've bought him a book in Welsh, so the whole family but for us (DH's family are Israeli) will find it hard to read. So usually it ends up with our family reading it and them watching.
Then we go downstairs after that, having watched him put his stocking up (he gets stocking presents for tomorrow too) and tidy away his presents into his toy box or whatever. Then we usually play a board game or something similar, and at around 7, we'll take DD1, 2 and the other children out around the village to look at the Christmas lights up.
By the time we walk back, it's about 8:30, and DD2 and most of my nieces and nephews go to bed at that time, so they open their Christmas pyjamas, and go up to bed with their stockings.
Then it's only DD1, DNiece and the adults, so usually we just eat some more and stick presents on the tree for tomorrow too. Then DD1 and DNiece might open a few more presents, and at around 12pm we'll go to midnight mass. We aren't actually religious, but my parents are, and the church hall has food and things after and before, and everyone in our hamlet/village will come if they can stay awake for it, so we feel we have to.
Oh, and when we wake up, we have the yearly tradition of chasing DD2 as she tries to put an elf hat on one of the dog's heads. Or attempts to give our rats a nibble of a mince pie.