Holy Martyr Mertios of Mauretania.
St. Mertios was a soldier from Mauretania in North Africa who confessed Christ during the persecution of Diocletian. Refusing to sacrifice to the idols, he was beaten and thrown into prison, where he died of his wounds.
He is commemorated on January 12.
Feast day
On the New Calendar, Mertios the Martyr is commemorated on January 12. Churches on the Old (Julian) Calendar keep the feast on January 25 of the civil calendar.
Also commemorated on January 12

Peter Apselamos
Martyr, Πέτρος ο Αβεσαλαμίτης
Holy Martyr Peter Apselamos of Palestine, burned for Christ.
Tigrios and Eutropios
Martyr, Τίγριος και Ευτρόπιος
Holy Martyrs Tigrios the Presbyter and Eutropios the Reader of Constantinople.
Martinian of Belozersk
Venerable, Μαρτινιανός
Venerable Martinian, abbot of Belozersk, disciple of St. Cyril of White Lake.