Well my family is 95% polish and the polish tradition is that Christmas eve is the BIG dooda. It's the most important part (more than Christmas day itself). We have the big "meatless" dinner with our homemade pierogies and fish and etc etc etc. We go to mass at night and come back for desert and we stay up late into the night. Then Christmas day comes and we do another dinner, but smaller (as my sisters and their hubbies are off to the in-laws) but it's not nearly as special or big.
So what do you celebrate more? Christmas or Christmas Eve? And do you have any traditions? (we always make pierogies and decorate gingerbread cookies?)... 2 weeks before of course.