So it was all your uncle, and you probably didn't really understand why at the time nor agree with the way things went down, yet you've held on to the tradition? Bravo sir!
As a Christian, you should be glad if someone is trying to take Christ out of the pagan tradition of celebrating his birthday on December 25th.
If Jesus Christ wasn't born on December 25th, then who's birthday are people celebrating on that day? "Another Jesus?"