January 18 (Eastern Orthodox liturgics)
January 17 - Eastern Orthodox liturgical calendar - January 19
All fixed commemorations below are observed on January 31 by Eastern Orthodox Churches on the Old Calendar.
For January 18th, Orthodox Churches on the Old Calendar commemorate the Saints listed on January 5.
Saints
- Martyr Theodula and her companions Helladius, Theodoulos, Boethius, Evagrius, and Macarius, of Anazarbus, Cilicia
- Martyr Xenia, by fireSaint Athanasius the Great, Patriarch of Alexandria
- Venerable Marcian, Monk of Cyrrhus, Syria
- Venerable Silvanus the Ascetic of Gaza, Palestine Saint Cyril, Patriarch of Alexandria
- Venerable Ephraim, Bishop of Mylasa, Caria, Asia Minor
Pre-Schism Western saints
- Virgin Martyr Prisca, venerated from ancient times in Rome, where a church is dedicated to her on the Aventine
- Martyrs Archelais, Thecla and Susanna, three holy virgins, at Salerno
- Saint Volusianus of Tours, a married senator who was chosen Bishop of Tours in France and shortly after driven out by Arian Visigoths
- Saint Liberata of Como, a holy virgin in Como in Italy where with her sister Saint Faustina she founded the convent of Santa Margarita
- Saint Leobardus the Recluse of Marmoutier, Gaul
- Saint Ninnidh of Inishmacsaint, Ireland
- Saint Deicolus, one of the twelve disciples to accompany St. Columbanus in his missionary enterprise
- Saint Ulfrid, missionary in Germany and Sweden, martyred for destroying an image of Thor
Post-Schism Orthodox saints
- Venerable Ephraim the Lesser of Georgia
- Venerable Cyril, Abbot of Kiev
- Saint Joachim I, Patriarch of Tarnovo and Bulgaria Venerable Schemamonk Cyril and Schemanun Maria, parents of Saint Sergius of Radonezh
- Saint Maximus the New of Serbia, Metropolitan of Wallachia, son of Saint Stefan Branković the Blind, Despot of Serbia
- Venerable Athanasius, Monk of Valaam Monastery and Abbot of Syamzha, Vologda Oblast
- Righteous Athanasius, Fool for Christ of Novolotsk Monastery, Karelia
- Venerable Alexis Shushania, Hieromonk of Teklati, Georgia
New martyrs and confessors
- New Hieromartyr Michael Kargopolov, Priest
- New Hieromartyr Eugene Isadsky, Priest
- New Hieromartyr Vladimir Zubkovich, Archpriest of Smolevichi, Belorussia
- New Hieromartyrs Nicholas Krasovsky, Sergius Lebedev, and Alexander Rousinov, Priests
Other commemorations
- Slaying of Bishop Paul de Ballester-Convallier of Mexico