From OrthodoxWiki
Feasts
Holy
Equals-to-the-Apostles Methodius and Cyril,
Enlighteners of the Slavs;
Hieromartyr Mocius (Mucius),
presbyter of Amphipolis in Macedonia ; commemoration of the founding of Constantinople;
Saint Nicodemus,
Archbishop of Serbia;
Venerable Sophronius, recluse of the
Kiev Caves;
Martyr Joseph,
Metropolitan of Astrakhan; New-Martyrs Dioscorus and Argyrus; Saint
Bessarion, Archbishop of Larissa; Martyr Acacius of Lower Moesia; Saint
Rostislav the Prince of Great Moravia; Saint Theopemptos the Martyr and his companions; Venerable-martyr Olympia; Saint Tudy,
Abbot of Ile Tudy; Saint Comgall, Bishop and founder of Bangor
Monastery; Saint Wiro; Saint Bassos; Martyr Wiborada, anchoress of St. Gallen in Germany (see also
May 2); St. Theophylact, Bishop of Stavropol (+1872); New Hieromartyr Alexander, Archbishop of Kharkov (1940); New Hieromartyr Michael, priest (1920)