We are in Christmas mood at the college, that's why one of our teachers decided to set up a sort of Christmas tradition where you have to give a gift to someone but it is a secret, it means, the person doesn't know who is going to give her/him a gift. We called it "secret friend" and I don't know if in other country have a similar tradition, I guess they do, or maybe they do it in a different way... Let me know what kind of Christmas tradition do you have in your country?