Say, St. Andrew's feast means the beginning of the Advent Novena. Can't forget that.
For best results, pray daily from today to December 25th. And while we're facetiously applying the language of commerce to holy things, you might enjoy this.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 the piercing cold. In that hour vouchsafe, O Lord, to hear my prayer and grant my request[here mention your intention]through the merits of Our Saviour Jesus Christ, and of His blessed Mother. Amen.