Just like everything else in Christianity

Christmas also has nothing to do with Jesus or Christianity. It was supposedly a pagan holiday related to the winter festival related to a bunch of superstition. I’ve seen efforts by some apologetic Christians to de-link Christmas from the stigma of being a ‘pagan’ holiday by quoting a bunch of vague and obscure narratives/snippets about early Christian’s festivity and passages from the bible to give a ‘Christian’ spin on the holiday. Unfortunately or maybe fortunately, really depend on how you choose to look at it, Christmas is soo commercialized nowadays that no one really cares about the religious or the pagan significance of the day.

While the western world has standardized Christmas to fall exactly on Dec 25th, other Christians like the Orthodox Church prefer to celebrate Christmas on January 7.