January 23 in Eastern Orthodox liturgical calendars is a feast day and a day of commemoration of saints and martyrs. Although some Orthodox churches use the Revised Julian Calendar and others use the traditional Julian calendar, the fixed commemorations for their respective January 23 are broadly the same, no matter which calendar is used.
Hieromartyr Clement, Bishop of Ancyra, and Martyr Agathangelus (312)
Saint Ascholius, Bishop of Thessaloniki (383)
Venerable Eusebius the Recluse of Mount Coryphe near Antioch (4th century)
Venerable Salamanes the Silent (Salamanes the Hesychast) of the Euphrates (c. 400)
Venerable Mausimas the Syrian, Priest near Cyrrhus (before 423)
The Holy Two Martyrs of Parium, near Cyzicus and Lampsacus, in Asia Minor
Saint Emerentiana, a martyr in Rome (305)
Saint Amasius of Teano, Bishop of Teano in central Italy (356)
Saint Paulinus the Merciful, Bishop of Nola (431)
Saints Severian and Aquila, a husband and wife martyred in Julia Caesarea in Mauritania in North Africa
Saint Martyrius (Martory), a hermit in the Abruzzi in Italy (6th century)
Saint Ormond (Armand), monk of the monastery of Saint Mairé in France, where he became abbot (6th century)
Saint Ildefonsus (Alphonse, Alonzo), Archbishop of Toledo from 657 (667)
Saint Colman of Lismore, Abbot of Lismore Abbey in Ireland and also a bishop (702)
Saint Lufthild, a saint honoured near Cologne in Germany, where she lived as an anchoress (c. 850)
Saint Maimbod (Mainboeuf), martyred by pagans while preaching to peasants near Kaltenbrunn in Alsace, now in France (c. 880)
Saint Dionysius of Olympus and Mount Athos (1541)