In Italy as it's a catholic country, people use to spend time with family, and have some traditional things like games and great dinner and lunch!
Of course we have the tradition of the tree too...even if the catholics prefere to do the "presepe" -something like little dolls, houses and other stuff that represent the night of Jesus birth.
I prefere the tree...as i'm not that much catholic...and also because I prefere the tree legend about the light, the hope that north europe people still keep!
so in my room i got a little tree, and my family do a big one on the living room + the presepe!