Dh and I grew up with different Christmas traditions so we decided to use some of these and make new ones for ourselves.
We like Christmas to be gradual so 1st December is the reusable Advent Calendar. When the children were very little the calendar was not filled all the way to 24th but we put a single chocolate santa/reindeer/ball in every night for the next morning. Also the Christmas table cloth (oilcloth) table runner and place mats. We have Christmas mugs for hot chocolate and acrylic tumblers when they were little.
The weekend around 7th is when the tree goes up. Everyone does the tree, Dh and Ds2 do outdoor lights, Ds1 and I do the stair banister.
We would make mince pies (shop bought mincemeat but grated the zest of an orange into it) and Christmas shaped gingerbread cookies.
Movies, Polar Express, Prep and Landing, and now Elf. We used to go to a Christmas concert and walk round the estate looking at all the lit up houses.
They do get new pyjamas on Christmas eve but not Christmas themed, just ones that are new. Every year we film them saying it is Christmas eve and we are swapping our advent calendar for stockings. They still do this, they are 18 and 15! Those stockings magically still get filled, if you ask them of course they believe in Father Christmas.
Stockings are downstairs in the lounge. Dh used to have his on the end of his bed and would wake at 3am and open it all. Hence why our stockings are in the lounge on the fireplace.
We also have a Christmas menu, Christmas eve is a mustard maple ham we make, crunchy roast potatoes and veg. Christmas day is at my sister's house for the full turkey dinner. Boxing day is that left over ham with part baked rolls, cheeses, chutney etc. Every year we have a post-Christmas look back at what we liked so we can amend anything for the next year. I write it all down.