January 23 (Eastern Orthodox liturgics)
January 22 - Eastern Orthodox liturgical calendar - January 24
All fixed commemorations below are observed on February 5 by Eastern Orthodox Churches on the Old Calendar.
For January 23rd, Orthodox Churches on the Old Calendar commemorate the Saints listed on January 10.
Saints
Hieromartyr Clement, Bishop of Ancyra, and Martyr Agathangelus- Saint Ascholius, Bishop of Thessaloniki
- Venerable Eusebius the Recluse of Mount Coryphe near Antioch
- Venerable Salamanes the Silent of the Euphrates
- Venerable Mausimas the Syrian, Priest near Cyrrhus
- The Holy Two Martyrs of Parium, near Cyzicus and Lampsacus, in Asia Minor
Pre-Schism Western saints
- Saint Emerentiana, a martyr in Rome
- Saint Amasius of Teano, Bishop of Teano in central Italy
- Saint Paulinus the Merciful, Bishop of Nola
- Saints Severian and Aquila, a husband and wife martyred in Julia Caesarea in Mauritania in North Africa
- Saint Martyrius, a hermit in the Abruzzi in Italy
- Saint Ormond, monk of the monastery of Saint Mairé in France, where he became abbot
- Saint Ildefonsus, Archbishop of Toledo from 657
- Saint Colman of Lismore, Abbot of Lismore Abbey in Ireland and also a bishop
- Saint Lufthild, a saint honoured near Cologne in Germany, where she lived as an anchoress
- Saint Maimbod, martyred by pagans while preaching to peasants near Kaltenbrunn in Alsace, now in France
Post-Schism Orthodox saints
- Saint Dionysius of Olympus and Mount Athos
- Venerable Gennadius of Kostroma
- Venerable Alexander, Abbot of Voche, near Galich, Kostroma Oblast
- Saint Barlaam, founder of Chikoisk Monastery, Siberia
New martyrs and confessors
- New Hieromartyr Seraphim Bulashov, Abbot of Holy Transfiguration Guslitsky Monastery, Moscow
- New Hieromartyr Anatolius Grisjuk, Bishop of Odessa
- New Virgin Martyrs Eudokia and Ecaterine of Moscow
- New Virgin Martyr Militsa of Moscow
Other commemorations
- Commemoration of the Holy Fathers of the Sixth Ecumenical Council Synaxis of the Saints of Kostroma
- Translation of the relics of Saint Theoctistus, Archbishop of Novgorod
- Repose of Abbot Damascene of Valaam Monastery
- Repose of Archimandrite John Krestiankin of the Pskov-Caves Monastery