December 12 (Eastern Orthodox liturgics)

Saints

• Hieromartyr Alexander, Archbishop of Jerusalem
• Martyr Aitherius, under Maximian, tortured and beheaded for refusing to sacrifice to idols Saint Spyridon the Wonderworker, Bishop of Tremithus
• Venerable Amonathus, Monk of Pelusium
• Venerable Anthus, Monk of Palestine
• Saint Euphemiane
• Martyr John, Abbot of the Zedazeni Monastery, Georgia

Pre-Schism Western saints

• Martyr Synesius of Rome, a Reader, tortured and beheaded for refusing to sacrifice to idols
• Martyrs Maxentius, Constantius, Crescentius, Justinus and their Companions, martyrs in Trier in Germany in the reign of Diocletian, under the governor Rictiovarus
• Saint Abra of Poitiers, daughter of Saint Hilary of Poitiers in France
• Saint Corentin, first Bishop of Quimper in Brittany, he had lived as a hermit at Plomodiern
• Saint Finian of Clonard and Skellig Michael, teacher of Ireland and one of the fathers of Irish monasticism
• Saint Columba of Terryglass, born in Leinster in Ireland, he was a disciple of Saint Finian and Abbot of Tyrdaglas in Munster '
• Saint Gregory of Terracina, a disciple of Saint Benedict, and with his brother Saint Speciosus, a monk at Terracina in Italy
• Saint Cormac, an Abbot in Ireland and friend of Saint Columba
• Saint Colman of Glendalough in Ireland, Abbot
• Saint Agatha, nun at Wimborne in Dorset in England and a disciple of Saint Lioba, she went to Germany to help Saint Boniface in his missionary work

Post-Schism Orthodox saints

• Saint John, Metropolitan of Zichnon, founder of the Monastery of the Forerunner on Mt. Menikion
• Venerable Therapon, Abbot of Monza Monastery
• Saint Mardarije Uskoković of Libertyville, Illinois, Enlightener and Apostle of the Church in America

Other commemorations

• Sunday of the Holy Forefathers of Jesus Christ Synaxis of the First Martyrs of the American land:
• Repose of Flegont Ostrovsky, Stylite of Kimlyai, Mordovia