We pretty much celebrate most of December, when I think about it. It's become a tradition amongst a small group of friends to get together for the second weekend of the month as a social - we used to all attend a "workshop" run by some author friends at a residential adult education college, but prices have continued to rise so we decided that as the main point of being there was to see each other (and not the subject matter under discussion) we'd host the weekend at our home for a select group instead. The following weekend there's a gathering in Oxford for a pot luck lunch and bran tub, and then we come on to Christmas itself. When it's family all the way. This year we're more separate than usual - I've got the older generation (my parents, Steve's dad) here for Christmas Day, then we head down to my sister's for tea. Meeting another sister on Boxing Day at my parents' place and then attempting to catch up with the missing relatives as soon as feasible. Then we're celebrating a friend's birthday in London on 29th, and hosting as many people as can come on New Year's Eve.
I don't think we'd have time to fit any gods into all of this! We have a Christmas tree crowned with a rather mad snowman, and lights outside the house, and a mistletoe wreath on the front door, and loads of cards, and I have no problem at all with using the word Christmas as a form of verbal shorthand for what we're up to.
Incidentally, I was working with a Muslim colleague this week and asked her if she was planning anything. "Oh, we don't really celebrate Christmas," she said, "We just invite everyone to the house to have a big meal and we give presents to all the children. And we decorate the house and have a tree ...but we don't really celebrate".   Sounds pretty much like our family events, although probably without the alcohol!

Anne