One could make an honest argument that the Christmas traditions are also a celebration. Many are. Santa Claus? Rudolph? Mistletoe?
The celebration is the birth of Jesus, Savior of the world. Some Christian celebrations have been reduced to tradition. That can be a problem:
2 “Why do your disciples break the tradition of the elders? They don’t wash their hands before they eat!”
3 Jesus replied, “And why do you break the command of God for the sake of your tradition?
4 For God said, ‘Honor your father and mother’ and ‘Anyone who curses his father or mother must be put to death.’
5 But you say that if a man says to his father or mother, ‘Whatever help you might otherwise have received from me is a gift devoted to God,’
6 he is not to ‘honor his father’ with it. Thus you nullify the word of God for the sake of your tradition.