April 25 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 April 25 are broadly the same, no matter which calendar is used.
Holy Apostle and Evangelist Mark, first Bishop of Alexandria (63)
Saint Anianas, second Bishop of Alexandria (86)
Martyr Nike (Nice), by the sword (303)
Hieromartyr Stephen II, Patriarch of Antioch (479)
Saint Macedonius II, Patriarch of Constantinople (516)
The Venebrable Eight Anchorites who were martyred by the sword.
Martyrs Evodius, Hermogenes and Callista, in Syracuse in Sicily.
Saint Phaebadius (Fiari), a Bishop of Agen in the south of France, who succeeded in stamping out Arianism in Gaul, together with his friend St Hilary of Poitiers (c. 392)
Saint Maughold (Macaille), a disciple of Mel who became Bishop of Croghan in Offaly in Ireland, the patron saint of the Isle of Man (c. 489) (see also: April 27)
Saint Rusticus, Archbishop of Lyon (501)
Saint Erminus, a monk at Lobbes Abbey in Belgium and later Abbot, Bishop and Confessor (737)
Saint Mella, the mother of two saints, Cannech and Tigernach, who became a nun and Abbess of Doire-Melle (Rossclogher Abbey), in County Leitrim (c. 780)
Saint Heribaldus, Monk and abbot of the monastery of St Germanus in Auxerre in France and later bishop of the same city (c. 857)
Saint Robert of Syracuse, Abbot of a monastery in Syracuse in Sicily (c. 1000)
Saint Sylvester of Obnorsk, Abbot of Obnora Monastery (1379)
Venerable Basil, Elder of Poiana Mărului, Romania (1767)
Venerable Bassian (Balashevich) the Blind, Hiero-schema-monk of the Kiev Caves (1827)