The liturgical season of Christmas begins with the vigil Masses on Christmas Eve and concludes on the Feast of the Baptism of the Lord, which normally falls on the Sunday following the Epiphany, as it does this year.
The Feast of the Epiphany of Our Lord Jesus Christ is one of the oldest Christian feasts, though, throughout the centuries, it has celebrated a variety of things. Epiphany comes from a Greek meaning “to reveal,” and all of the various events celebrated by the Feast of the Epiphany are revelations of Christ to humanity.
During the Christmas season, we celebrate the birth of Christ into our world and into our hearts, and reflect on the gift of salvation that is born with him.
Our celebration of Christmas does not end on December 26, rather Christmas season ends and the return to Ordinary Time occurs at the conclusion of the Feast of the Baptism of the Lord, which is on January 13. (8:6)