21 April
23 commemorations of 21 April in the fixed calendar of the Church, the Menaion. Churches on the Old Calendar keep this day on 4 May of the civil calendar.
Saints
- Martyrs Theodore of Perge in Pamphylia, his mother Philippa, and Dioscorus, Socrates, and Dionysius (c. 138-161)orthochristian.com · oca.org · holytrinityorthodox.com · pravoslavie.ru
- Martyr Alexandra the Empress, wife of Diocletian, and those with her (303)
- Martyrs Isaacius, Apollo, and Codratus, of Nicomedia
- Hieromartyrs Januarius, Bishop of Benevento, and his companions (c. 305)Οἱ Ἅγιοι Ἰανουάριος, Πρόκλος, Σῶσσος, Φαῦστος, Δησιδέριος, Ἀκούτιος καὶ Εὐτύχιος οἱ Μάρτυρεςsynaxarion.gr · oca.org · ecclesia.gr · pravoslavie.ru
- Saint Maximianus, Archbishop of Constantinople (434)Ὁ Ἅγιος Μαξιμιανὸς Ἐπίσκοπος Κωνσταντινουπόλεωςsynaxarion.gr · oca.org · ecclesia.gr · pravoslavie.ru
- Venerable Anastasius Sinaita, Abbot of the Monastery of St. Catherine at Sinai (c. 700)Ὁ Ὅσιος Ἀναστάσιος ὁ Ὁμολογητής ὁ Σιναΐτηςsynaxarion.gr · Roman Martyrology · ecclesia.gr · holytrinityorthodox.com
- Martyr Karol (Charles)saint.gr · ecclesia.gr
Orthodox saints after the Schism
- Saint Theodore the Philosopher of Kamske, martyred by Mongols (1323)Ὁ Ἅγιος Θεόδωρος ὁ Μάρτυρας ὁ Φιλόσοφοςsynaxarion.gr
- Venerable Jacob (Jakov, James), Abbot of Stromynsk Monastery, Radonezh (1392)Ὁ Ὅσιος Ἰάκωβοςsynaxarion.gr · holytrinityorthodox.com · pravoslavie.ru
- Saint Alexis, Priest of, Bortsurmany, Nizhny Novgorod (1848)mospat.ru · holytrinityorthodox.com · pravoslavie.ru
New martyrs and confessors
- New Hieromartyr John Prigorovsky, Priest (1918)holytrinityorthodox.com
- Saint Nicholas Pisarevsky, Confessor, Priest (1933)holytrinityorthodox.com
- New Hieromartyr Alexis Protopopov, Priest (1938)holytrinityorthodox.com
- New Hieromartyr Protopresbyter Basil Martysz of Teratyn, Chelm and Podlasie, Poland (1945)andhis.ru · holytrinityorthodox.com · pravoslavie.ru
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 Cyprian, Bishop of Brescia (582)orthodoxengland.org.uk
- Saint Beuno, Abbot, of Clynnog Fawr, Wales (642)Stanton, Menology of England and Wales · holytrinityorthodox.com · orthodoxengland.org.uk · pravoslavie.ru
- Saint Maelruba of Apur Crossan (Maelrubius, Maolrubha), Ireland (722)holytrinityorthodox.com · orthodoxengland.org.uk · pravoslavie.ru
- Saint Frodulphus (Frou), a monk at St Martin's in Autun (c. 750)orthodoxengland.org.uk
Other commemorations
Glorifications, translations of relics, wonderworking icons, and monks and elders remembered on the day, not all of whom are canonized.
- Synaxis of The Mozdok Icon of the Mother of God (Mozdokskaya) (1768)Σύναξις Ὑπεραγίας Θεοτόκου ἐν Μοζντὸκ τῆς Ρωσίαςsynaxarion.gr · holytrinityorthodox.com
- Uncovering of the relics (1999) of St. Theodore, Abbot of Sanaxar Monastery (1791)holytrinityorthodox.com · pravoslavie.ru
- Repose of Schemamonk Nicetas of Valaam Monastery (1907)pravoslavie.ru
- Repose of Elder Dometian of Tula (1908)pravoslavie.ru
- Repose of Hieroschemamonk Antipas II of Valaam Monastery (1912)pravoslavie.ru
- Repose of Nun Stefanida of Kosovo, Serbiapravoslavie.ru
The list is April 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.