No Christmas is not the day Jesus was born.  Maybe it was usurped from pagan holiday, I’ve heard several ideas.  Pretty sure, however, it is OK for the Body of Christ to usurp pagan holidays and make them captive to Christ.  And further am certain the Lord is not angered by a season of cheer, and charity, including the widespread sharing of the gospel in the amazing hymns of Christmas and the songs for children as well and the family memories those of us who are older carry in our Hearts.