It is celebrated 05.10.2026 according to the Julian calendar, or 18.10.2026 according to the Gregorian calendar. See what else we celebrate on that day here.
Venerable Cosmas, abbot in Bithynia (10th c.)
Ven. Cosmas, the hegumen of the monastery on the Sangarius River, Bithynia, died in the 10th century.
Ven. Cosmas, the hegumen of the monastery on the Sangarius River, Bithynia, died in the 10th century. 
