Sep 1: St. Giles, Abbot (and Twelve Brothers, Martyrs)
Sep 2: St. Stephen, King of Hungary, Confessor
Sep 5: St. Laurence Justinian, Bishop and Confessor
Sep 6: The Fifteenth Sunday after Pentecost
Sep 8: Nativity of the Blessed Virgin Mary
Sep 9: Second Day within the Octave of the Nativity of the Blessed Virgin (and St. Gorgonius, Martyr)
Sep 10: St. Nicholas of Tolentino, Confessor
Sep 11: Fourth Day within the Octave of the Nativity of the Blessed Virgin (and Sts. Protus and Hyacinth, Martyrs)
Sep 12: Fifth Day within the Octave of the Nativity of the Blessed Virgin (and Sunday within the Octave of the Nativity: Feast of the Most Holy Name of Mary)
Sep 13: The Sixteenth Sunday after Pentecost (and Sixth Day within the Octave of the Nativity of the Blessed Virgin)
Sep 14: Exaltation of the Holy Cross
Sep 15: Octave Day of the Nativity of the Blessed Virgin (and Feast of the Seven Dolours of the Blessed Virgin Mary; and St. Nicomedes, Martyr)
Sep 16: St. Cornelius, Pope and Martyr, and St. Cyprian, Bishop and Martyr (and Sts. Euphemia, Lucy, and Geminian, Martyrs)
Sep 17: Stigmata of St. Francis (and St. Hildegarde of Bingen, Martyrs)
Sep 18: St. Joseph of Cupertino, Confessor
Sep 19: St. Januarius, Bishop and Martyr, and his Companions, Martyrs
Sep 20: The Seventeenth Sunday after Pentecost (and St. Eustace and His Companions, Martyrs)
Sep 21: St. Matthew, Apostle and Evangelist
Sep 22: St. Thomas of Villanova, Bishop and Confessor (and St. Maurice and his Companions, Martyrs)
Sep 23: Ember Wednesday of September (and St. Linus, Pope and Martyr; and St. Thecla, Virgin and Martyr)
Sep 24: Our Lady of Ransom
Sep 25: St. Cyprian, Martyr, and St. Justina, Virgin and Martyr
Sep 27: The Eighteenth Sunday after Pentecost (and Sts. Cosmas and Damian, Martyrs)
Sep 28: St. Wenceslas, Duke and Martyr
Sep 29: Dedication of St. Michael the Archangel
Sep 30: St. Jerome, Priest, Confessor and Doctor of the Church