Let's see: Does the Bible say Jesus was born on December 25th? Nope.
Does the Bible say anything about putting up a tree and decorating it with lights? Nope.
Does the Bible say anything about a fat man in a red suit and flying reindeer? Nope.
Does the Bible say anything about singing Christmas carols and drinking eggnog? Nope.
Coca-Cola has more to due with Christmas than Jesus does. I like Tim Minchin's take on atheists celebrating Christmas:
We used to be fundamentalists . . . . I was in the ministry. When my wife and I told the kids we had become atheists they were ecstatic that they would not have to go to church or sunday school any more. Then we told them we would not be celebrating christmas and I thought they would mob me. So, yes . . we celebrate, though in my mind the whole thing (Xmas and new year) are really wound up on the 21st.
I like a few aspects of Christmas, but really hate others, so I kind of dread it. I get presents for a few people, and I like having dinner with my friends, and I always put up a few decorations. I even have a Nativity set! It was a cheap one that reminded me of the one my mother had, so I bought it. Last year, I put Darth Vader in it. :o] I don't see the harm of enjoying what you can of the holiday while ignoring the religious stupidity.
Otherwise, Christmas pretty much sucks. The stores will be ridiculously busy, traffic will be a mess, people generally will be at their bitchiest, and nobody is really very happy. Worst of all is the horrible Christmas music that I'll be hearing for nearly two solid months. I HATE Christmas music! Almost all of it is stupid, annoying, childish, and unimaginative, yet for some reason millions of people actually enjoy it, and stores feel compelled to play it nonstop over their in-store music system. It is that, more than anything else, that puts me in a bad mood when I have to shop any time between Thanksgiving and New Year's Day.