May 21 (old calendar) / June 3 (new calendar)

May 21 (old calendar) / June 3 (new calendar) 1st SUNDAY AFTER PENTECOST —  All Saints Holy Equals-to-the-Apostles Emperor Constantine and his mother, Helen (Elena) (327). St. Constantine (1129) and his children, Ss. Michael and Theodore, Wonderworkers of Múrom. Ven. Cassian the Greek, of Uglich (1504). The Meeting of the VLADIMIR Icon of the Most-holy Theotokos (in commemoration of the saving of Moscow from the invasion of the Crimean Khan, Mekhmet-Girei in