Who the fuck tells ghost stories at Christmas?
What do you think The Christmas Carol was?
Actually, most of Christmas is pretty scary if you think about it. Your wife is spontaneously and magically pregnant despite all you've done to prevent that. The kid is also the son of God, so no pressure raising that or anything though. There's also this fat neckbeard guy with a thing for red felt with white trim who does as many counts of breaking and entering as there are homes in the world, all in one night, every year, and he's never caught. He spies on every single child on earth to keep detailed tabs on their sleeping and waking hours. Did I mention there are legions of cult followers who dress exactly like him in several stores, malls, etc, because there are. That doesn't even touch the elves he's got up there. There's also some Frankenstein stuff going on with that one snowman; sure they say it's from the "magic hat," but you've gotta wonder what really did it.... Then again, maybe it's better if we don't wonder too much about that, cause hat or no ... he'll be back again some day....
Really, there's so much more I could get into. I could go on about the jackass reindeer who take advantage of the critical abilities of the guy they shunned out of their games, but I'm not even gonna touch that Grinch dude with a 39 1/2 foot pole.