St. Cassian the Wonderworker of Uglich

The celebration of the Synaxis of the Rostov and Yaroslav Saints on May 23 was established by resolution of His Holiness Patriarch Alexis I (+ 1970) and the Holy Synod of the Russian Orthodox Church, on March 10, 1964.

St Cassian the Greek is also commemorated on May 21 and October 2.