Venerable Sylvester of Obnora, disciple of Saint Sergius of Radonezh.
Sylvester was a disciple of Saint Sergius of Radonezh who withdrew to the forests by the river Obnora in northern Russia in the fourteenth century. Disciples gathered around him and a monastery of the Resurrection was founded there.
He reposed in 1379 and his relics are venerated at his monastery.
Feast day
On the New Calendar, Sylvester of Obnora is commemorated on April 25. Churches on the Old (Julian) Calendar keep the feast on May 8 of the civil calendar.
Also commemorated on April 25

Macedonius II of Constantinople
Hierarch, Μακεδόνιος Β' Πατριάρχης
Saint Macedonius II, Patriarch of Constantinople, exiled for defending the Council of Chalcedon.
Anianus of Alexandria
Hierarch, Αννιανός Αλεξανδρείας
Saint Anianus, second Bishop of Alexandria, converted by the Apostle Mark.
Basil of Poiana Marului
Venerable, Βασίλειος ο Ησυχαστής
Venerable Basil of Poiana Marului, Romanian elder and teacher of the prayer of the heart.