Once in a millennium, a High Being or Avatar will be sent to the earth plane by God, the Creator Principle, in order to reestablish the balance within the material plane that has been upset because human beings choose to follow their own will instead of following the Will of God.
Jesus Christ was sent by God, to re-establish the balance between the Divine and the anti-divine on earth. Christmas day is celebrated as the birth date of Jesus Christ and the day is one of the most sacred days in the calendar year.