December 23 - Eastern Orthodox liturgical calendar - December 25
All fixed commemorations below celebrated on January 6 by Eastern Orthodox Churches on the Old Calendar.
For December 24th, Orthodox Churches on the Old Calendar commemorate the Saints listed on December 11.
The Eve of the Nativity of Christ
Venerable Nun-Martyr Eugenia of Rome, and with her:
Martyrs Philip her father, Protus, Hyacinth (Jacinth), Basilla, and Claudia (262)
Martyrs Sossios and Theokleios (c. 286–305)
Martyr Achaicus (Achaikos), by the sword
Venerable Betimius (Bitimionus, Vitimionus) of Scetis (Scete) (5th century)
Venerable Aphrodisius, Monk of Palestine (6th century)
Venerable Antiochus (Antiochus Strategos, Antiochos Sabbaitis), Monk of the Great Lavra of St. Sabbas the Sanctified in Jerusalem, Palestine (635)
Venerable Nicholas the Monk of Bulgaria (Nicholas the former soldier) (c. 802–811)
Martyrs Lucian, Metrobius, Paul, Zenobius, Theotimus and Drusus, in Tripoli in North Africa
Hieromartyr Gregory of Spoleto, a priest martyred in Spoleto in Italy under Maximinian Herculeus
Saint Delphinus, Bishop of Bordeaux in France; he helped convert Saint Paulinus of Nola and was an untiring opponent of Priscillianism (404)
Saint Venerandus, born of a senatorial family in Clermont in Auvergne in France, he became bishop there from 385–423 (423)
Saint Caranus (Carannus), a saint of the east of Scotland
Saint Tarsila, an aunt of Saint Gregory the Great, sister of Saint Emiliana and niece of Pope Felix III; she led a life of seclusion and asceticism in her paternal home (581)