- ✠ Saint Damasus, Pope
- ✠ Saints Damian (and Cosmos), Martyrs
- ✠ Saint Daria (and Chrysanthus), Martyr
- ✠ Saint David, Archbishop of Wales
- ✠ Saint Delphinus, Bishop of Bordeaux
- ✠ Bl. Didace Pelletier, Recollet (French Franciscan) of New France
- ✠ Saint Diego, (or Didacus), Franciscan Confessor
- ✠ Saint Dionysia (with Peter, Paul, Andrew), Virgin, Martyr
- ✠ Saint Dionysius, the Areopagite, First Bishop of Athens and of Paris, and his Companions, Martyrs
- ✠ Saint Dominic de Guzman, Priest, Founder of the Order of Preachers, known as Dominicans
- ✠ Saint Dominic of Silos, Abbot
- ✠ St. Dominic Savio, Confessor
- ✠ Sts. Donatian and Rogatian, Martyrs
- ✠ Saint Dorothy, Virgin and Martyr
