Feast Day: September 17
Weekday with two Optional Memorials. Saint Robert Bellarmine (1542-1621), Italian Jesuit Cardinal and Doctor of the Church. Saint Hildegard of Bingen (1098-1179), German Benedictine abbess, mystic, declared Doctor of the Church by Benedict XVI in 2012 (USCCB Liturgical Calendar 2026).
Saints Commemorated on September 17
From the USCCB 2026 Liturgical Calendar.