What is Christmas?

In the BCP, Christmas Day is one of the seven principal feasts. The Christmas season lasts twelve days, from Christmas Day until Jan. 5, the day before the Epiphany. The season includes Christmas Day, the First Sunday after Christmas Day, the Holy Name of Our Lord Jesus Christ, and may include the Second Sunday after Christmas Day. In many parishes, the main liturgical celebrations of Christmas take place on Christmas Eve. The BOS includes a variety of resources for use during Christmas, including a form for a Station at a Christmas Crèche, a form for a Christmas Festival of Lessons and Music, and seasonal blessings for use during the Christmas season.
​Source: Episcopal Church Calendar Church Year