Venerable Nicholas the former soldier, monk of Bulgaria.
Venerable Nicholas was a soldier of the Byzantine army in the ninth century. Tradition relates that, having resisted temptation on the eve of a battle, he was shown in a vision that he alone of his company would be spared, and in thanksgiving he left the army and became a monk, living in repentance until his repose.
Feast day
On the New Calendar, Nicholas the Monk is commemorated on December 24. Churches on the Old (Julian) Calendar keep the feast on January 6 of the civil calendar.
Also commemorated on December 24

Ahmed the Calfa
Martyr, Αχμέτ ο Κάλφας
New Martyr Ahmed the Calfa of Constantinople, a convert from Islam.
Protas and Hyacinth
Martyr, Πρωτάς και Υάκινθος
Holy Martyrs Protas and Hyacinth, servants of Saint Eugenia.
Antiochus the Monk
Venerable, Αντίοχος
Venerable Antiochus of the Lavra of Saint Sabas, author of the Pandects.