The Christmas Prayer - "Hail and blessed be the hour..." is a prayer recited daily from the feast of St. Andrew until Christmas. The connection to St. Andrew is the proximity of his feast (November 30) to the first Sunday of Advent. Various printings of the the prayer mention reciting it fifteen times each day. Does this mean fifteen times in a row? Not forbidden, but not normally advised. The idea is to spread the 15 times throughout the day so as to imitate Our Lady, and to look forward to the birth of the Redeemer. An example is to recite the prayer three times at each meal, then thrice before and after the Rosary.
Hail and blessed be the hour and moment in which the Son of God was born of the most pure Virgin Mary,
at midnight, in Bethlehem, in piercing cold. In that hour, vouchsafe, O my God! to hear my prayer and
grant my desires, through the merits of Our Saviour Jesus Christ, and of His Blessed Mother.