Christmas is huge in my family and we have loads of silly traditions...
Obviously post the letter to santa, asking for gifts and get the reply. We always used to make the paper chains... tacky but essentially Christmas.
Always watch a Christmas movie on Xmas eve (last bit of TV before Xmas starts!)
We have a party on Xmas eve and open one small gift, just to get the season going. Children also write a letter to Father Christmas to thank him for their gifts before they go to bed.
Presents go under the tree a week before Xmas, and every day you can make one guess as to what your present is. Naturally, they are heavily disguised so you never guess (like shirts in old lemonade bottles, small gifts put inside packets of cornflakes and then wrapped up and disguised etc). Each day we have a feel and a sniff our our gift and try to work out what we've been given (of course we never do!).
Father Christmas gifts are opened in mum and dad's bed.. they usually include the 'Christmas day outfits' which also means new underwear etc.
After breakfast presents from mum and dad are opened (one at a time). This lasts all morning.
After lunch, gifts from lesser family members and friends are opened.
TV is banned on Christmas day. Present opening usually finishes about 4 in the afternoon. We then have a buffet supper.
Evening is spent playing family games and having family time.
Boxing day is spent at the in laws.
The week proceeding Xmas is spent having small family parties... Each family hosts one supper. Time is spent playing games (winning small prizes) and usually includes one tree present.
Tree decorations are also bought one a year.
Children make calendars as thank you presents for the adults. Usually most of the materials to do this are given in their santa's sacks.
Thats most of them I think!