January 10 (Eastern Orthodox liturgics)
January 9 - Eastern Orthodox liturgical calendar - January 11
All fixed commemorations below are observed on January 23 by Eastern Orthodox Churches on the Old Calendar.
For January 10th, Orthodox Churches on the Old Calendar commemorate the Saints listed on December 28.
Feasts
- Afterfeast of the Theophany of Our Lord and Savior Jesus Christ
Saints
- Blessed Theosebia the Deaconess, sister of Saints Macrina the Younger, Basil the Great, Peter of Sebaste, and Gregory of Nyssa Saint Gregory, Bishop of Nyssa, Cappadocia
- Venerable Ammon, Monk of Nitria in Egypt
- Saint Marcian the Presbyter of Constantinople
- '''Venerable Domitian, Bishop of Melitene and Wonderworker'''
Pre-Schism Western saints
- Saint Pétrone, monk at Lérins Abbey, then Bishop of Die in France
- Saint Diarmaid the Just, spiritual father of St Kieran of Clonmacnois and later founder of a monastery on Innis-Clotran Island, Ireland
- Saint Tómméne, Archbishop of Armagh in Ireland
- Saint Sæthryth, Abbess
- Saint John Camillus the Good, Bishop of Milan, he worked against Arianism and Monothelitism
- Saint Agatho, Pope of Rome
- Saint Peter Urseolus, Doge of Venice, later became a monk at the Monastery of Cuxa in Spain
Post-Schism Orthodox saints
- Venerable Paul, founder and Abbot of Obnora Monastery, Vologda
- Venerable Macarius of Pisemsk, Kostroma, and Obnora Monastery in Vologda, founder and Abbot of Pisma Monastery
- Venerable Antipas of Calapodesti in Romania, Mount Athos, and Valaam Monastery, Hieroschemamonk Venerable Theophan the Recluse, Bishop of Tambov
- Saint Smaragda Onishchenko of Nizhyn
New martyrs and confessors
- New Venerable Martyr Ephraim, Elder of Obnora Monastery, Vologda, and six monks of Obnora whose relics are incorrupt
- New Hieromartyr Zenobius Sutormin, Priest
- New Hieromartyr Peter Uspensky, Archpriest of Radushino
- New Hieromartyr Anatole Grisyuk, Metropolitan of Odessa and Cherson
- New Martyr Arsenia Dobronravova, Abbess of the Holy Resurrection–St. Theodore Convent