21 March
15 commemorations of 21 March in the fixed calendar of the Church, the Menaion. Churches on the Old Calendar keep this day on 3 April of the civil calendar.
Saints
- Martyrs Philemon and Domninus of Thessalonica, in ItalyΟἱ Ἅγιοι Δομνίνος καὶ Φιλήμων οἱ Μάρτυρεςorthochristian.com · synaxarion.gr · Roman Martyrology · pravoslavie.ru
- Saint Maria the Martyr, in PergeἩ Ἁγία Μαρία ἡ Μάρτυς ἡ ἐν Πέργῃsynaxarion.gr
- Saint Serapion, Bishop of Thmuis, Egypt (c. 358)Ὁ Ὅσιος Σεραπίων ὁ Σιδώνιοςsynaxarion.gr · Roman Martyrology · pravoslavie.ru
- Venerable Serapion the Sindonite, monk of Egypt (5th century)Ὁ Ὅσιος Σεραπίων ὁ Σιδώνιοςsynaxarion.gr · pravoslavie.ru
- Saint Sophronius, Abbot of the Monastery of St. Theodosius, in Palestine (542)pravoslavie.ru
- Saint Thomas, Patriarch of Constantinople (610)Ὁ Ἅγιος Θωμᾶς Πατριάρχης Κωνσταντινουπόλεωςsynaxarion.gr · oca.org · pravoslavie.ru
- Venerable Jacob the Confessor (James the Confessor), Bishop, of the Studion (late 8th century)Ὁ Ἅγιος Ἰάκωβος ὁ Ὁμολογητήςsynaxarion.gr · pravoslavie.ru
Orthodox saints after the Schism
- New Martyr Michael of Agrapha (Michael of Soluneia), at Thessalonica (1544 or 1547)Ὁ Ἅγιος Μιχαὴλ ὁ Νεομάρτυραςsynaxarion.gr · ecclesia.gr · pravoslavie.ru
- Venerable Seraphim of Vyritsa (1949)Ὁ Ὅσιος Σεραφείμ ἐκ Βυρίτσας Ρωσίαςsynaxarion.gr · oca.org · pravoslavie.ru
New martyrs and confessors
- New Hieromartyr Vladimir Vvedensky, Priest (1931)mospat.ru · holytrinityorthodox.com
- New Hieromartyr Theodore (Pozdeyevsky), Archbishop (1938)Ὁ Ἅγιος Θεόδωρος ὁ Ἱερομάρτυρας Ἐπίσκοπος Ποζδέγιεβsynaxarion.gr · holytrinityorthodox.com
Saints of the West before the Schism
Saints of the Latin West before the Schism of 1054. The Orthodox Church honours the saints of the undivided Church, though few of these are in the Greek or Slavic Menaia; this list follows the calendars kept by the Orthodox in the West.
- Saint Beryllus, Bishop of Catania (c. 90)Ὁ Ἅγιος Βήρυλλος Ἐπίσκοπος Κατάνηςsynaxarion.gr · orthodoxengland.org.uk · Roman Martyrology · pravoslavie.ru
- Saint Lupicinus of Condat, desert-dweller of the Jura Mountains, Gaul (480)Roman Martyrology · orthodoxengland.org.uk · pravoslavie.ru
- Saint Enda of Aran, Abbot of Arranmore, monk, earliest leader of Irish monasticism (530)orthodoxengland.org.uk · pravoslavie.ru
Other commemorations
Glorifications, translations of relics, wonderworking icons, and monks and elders remembered on the day, not all of whom are canonized.
- Glorification of Venerable Pachomius, Abbot, of Nerekhta (1384)pravoslavie.ru
The list is March 21 (Eastern Orthodox liturgics), read on 2026-09-25 and adapted under CC BY-SA 4.0: its sections and years, the Greek headings of the Great Synaxaristes where it cites them, and beside each line the sources it names. Names in bold are the saints the day is named for in Greek usage, checked against the Church of Cyprus.