I'm the most Kkkrackkkers of Amerikkkans so my tradition is just getting drunk off mulled wine and re-watching bad holiday movies with relatives I only kinda like.
I'm sometimes a little jealous of people who have weirder shit going on, like gremlins who slam doors and steal sausages or shitting Christmas logs. We need to bring back weird ass half-pagan shit.
We all go to the local Drive-In movie theater and watch a Gruesome Twosome Christmas double feature: Passion of the Christ followed by Life of Brian. The irony being that these are Easter movies.
Just kidding.
CommieJones pretty much nailed what "culture" does on Christmas (even if they are not American) so I refer you to their post.