March 15 in Eastern Orthodox liturgical calendars is a feast day and a day of commemoration of saints and martyrs. Although some Orthodox churches use the Revised Julian Calendar and others use the traditional Julian calendar, the fixed commemorations for their respective March 15 are broadly the same, no matter which calendar is used.
Apostle Aristobulus of the Seventy, first bishop of Britain (1st century) (see also: March 16)
Martyrs Agapius, and with him seven martyrs (303):
Publius (Pauplios); Timolaus; Romulus; two named Dionysius; and two named Alexander; at Caesarea in Palestine.
Hieromartyr Alexander of Side in Pamphylia (270-275)
Martyr Nicander of Egypt (305)
Saint Hebarestes, steward of a church located in Jerusalem.
Martyr Mancius (5th or 6th century)
Saint Speciosus, a monk at Terracina in Italy (c. 555)
Saint Probus of Rieti, Bishop of Rieti in central Italy (c. 571)
Saint Zachariah, Pope of Rome (752)
Saint Leocritia (Lucretia), a holy virgin in Cordoba in Spain (859)
Saint Nicander, monk, of Gorodetsk, Nizhni-Novgorod (1603)
New Martyr Manuel of Crete (1792)
Hieromartyr Parthenios, Deacon, at Didymoteicho (1805)
New Hieromartyr Alexis Vinogradov, Protopresbyter of Novotroitskoye, Tver (1938)
New Hieromartyr Demetrius Legeydo, Priest of Chimkent (1938)
New Hieromartyr Michael Bogoslovsky, Protopresbyter of Simferopol-Crimea (1940)