Yup... started by them wise guys from the East, bringin' them gifts....
(At LEAST they gave gifts to the Holy Family, NOT to each other!!! ;^)
The wise men simply attended the birth. There is no command or example of a yearly celebration on December 25th or any other date in the New Testament or the early New Testament church.
Christmas is an optional, man-made tradition. Those who would make it a requirement are no different than the Pharisees condemned by Jesus.