The Greatest Feast During the Twelve Days of Christmas

During the Twelve Days of Christmas, the Catholic Church celebrates many important feasts, including the feasts of Saint Stephen, the first martyr (December 26), whose martyrdom is recorded in Acts 6-7; Saint John the Apostle (December 27), who wrote the Gospel of John and the Book of Revelation, as well as three epistles; the Holy Innocents (December 29), the children who were slaughtered at the order of King Herod, when he was trying to kill the Christ Child; and the Holy Family (normally celebrated on the Sunday after Christmas, and on December 30, when Christmas falls on a Sunday).
None, however, is as important as the feast celebrated on the octave (eighth day) of Christmas, January 1: the Solemnity of Mary, the Mother of God.