Venerable Ammonios, an Egyptian desert ascetic.
St. Ammonios is commemorated on January 10 as one of the desert ascetics of Egypt who reposed in peace. Tradition remembers him for the strictness of his fasting and the gentleness of his counsel.
Feast day
On the New Calendar, Ammonios the Venerable is commemorated on January 10. Churches on the Old (Julian) Calendar keep the feast on January 23 of the civil calendar.
Also commemorated on January 10

Markianos the Presbyter
Venerable, Μαρκιανός
St. Markianos, priest and steward of the Great Church of Constantinople.
Theosebia the Deaconess
Holy Woman, Θεοσεβία
Blessed Theosebia the Deaconess, sister of St. Basil the Great and St. Gregory of Nyssa.
Antipas of Valaam
Venerable, Αντίπας ο Αθωνίτης
Venerable Antipas of Calapodesti, Athonite and Valaam ascetic.