During September, as in all of Ordinary Time (formerly known as Time After Pentecost), the Liturgy does not focus on one particular mystery of Christ, but views the mystery of Christ in all its aspects. We follow the life of Christ through the Gospels, and focus on the teachings and parables of Jesus and what it means for us to be a follower of Christ.
During Ordinary Time we can concentrate more on the saints and imitate their holiness as Christ's followers.
This month the main liturgical feasts are St. Gregory the Great (September 3), Birth of Mary (September 8), St. Peter Claver (September 9), St. John Chrysostom (September 13), Exaltation of the Holy Cross (September 14), Our Lady of Sorrows (September 15) Sts. Cornelius and Cyprian (September 16), St. Robert Bellarmine (September 17), St. Andrew Kim and Companions (September 20), St. Matthew (September 21), St. Pio (September 23), St. Vincent de Paul (September 27), Sts. Michael, Gabriel and Raphael (September 29) and St. Jerome (September 30).
The feasts of the Holy Name of Mary (September 12), St. Januarius (September 19), and Sts. Cosmas and Damian (September 26), are superseded by the Sunday liturgy.