April 3 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 3 are broadly the same, no matter which calendar is used.
Martyr Elpidephorus (3rd century)
Martyrs Dius, Bithonius, and Galycus (3rd century)
Martyrs Cassius, Philip, and Eutychius, of Thessaloniki (304)
Virgin-martyrs Irene, Agapia and Chionia of Aquileia, in Thessaloniki (304) (see also: April 16)
Martyr Ulphianus of Tyre (306)
Virgin-martyr Theodosia of Tyre (308) (see also: April 2)
Martyrs Evagrius, Benignus, Chrestus, Arestus, Kinnudius, Rufus, Patricius, and Zosima, at Tomis in Moesia (c. 310)
Venerable Illyrius, monk of Mount Myrsinon in the Peloponnese.
Venerable Nicetas of Medikion (Nicetas the Confessor), Abbot of Medikion (824) (Not to be confused with Nicetas the Confessor - May 28)
Venerable Joseph the Hymnographer, of Sicily (883) (see also: April 4 - Russian)
Saint Pancras of Taormina (Pancratius), born in Antioch, consecrated by the Apostle Peter and sent to Taormina in Sicily where he was stoned to death (c. 40)
Saint Sixtus I (Xystus), Pope of Rome from 117 to c 125, sometimes referred to as a martyr (c. 125)
Saint Fara (Burgundofara) of Eboriac, now Faremoutiers (657)
Saint Attala (Attalus), a monk and abbot of a monastery in Taormina in Sicily (ca. 800)
Saint Philip I, Metropolitan of Moscow (1473) (see also: April 5)
Saint Nectarius, founder of Bezhetsk Monastery, Tver (1492)
New Martyr Paul the Russian at Constantinople (1683) (see also: April 6)