October 21 (Eastern Orthodox liturgics)

Saints

Hieromartyr Socrates, Priest, and Martyr Theodote, of Ancyra (c. 230)

Martyrs Dasius, Gaius, and Zoticus at Nicomedia (303)

Saint Darius, Zosimus, Paul, and Secundus, martyrs of Nicaea by Diocletian (4th century)

Martyr Azes, by fire.

Saints Plantinos (Platinus), Irene and Marina of Raithu.

Venerable Hilarion the Great, of Gaza (371)

The 63 Martyrs of Jerusalem (724):

Pegasus, Neophytus, Acacius, Dorotheus, Stephen, Dometius, Herman, Dionysius, Epiphanius, Stratonicus, Leontius, Emmanuel, Theophilus, Elias, John, Samuel, Eulampius, Alexius, Photius, Eutrepius, Methodius, Chariton, Theophylactus, Anastasius, Andronicus, Symeon, Theoktistus, Romanus, Paul, Agathonicus, Minas, Athanasius, Jacob, Nicephorus, Porphyrius, Timothy, Irenarchus, Auxentius, Joseph, Gregory, Callinicus, Aaron, Cyriacus, Theodosius, Eustathius, Isaac, Alexander, Eleutherius, Adrian, Christophor, Antiochus, Isidore, Parthenius, Sergius, Euplus, Ignatius, Theophanes, Cyril, Zachariah, and Anthimus.

Martyrs Andrew, Stephen, Paul and Peter, under Constantine V Copronymus (c. 741–775)

Venerable Martyr Zacharias, by drowning in the sea.

Venerable Baruch, reposed in peace.

Venerable Phillip

Venerable Jacob, Oeconomus of Batheos Rhyakos Monastery.

Pre-Schism Western saints

Saint Asterius of Ostia, martyred priest (c. 223)

Saint Viator of Lyons, hermit (389).

Saint Ursula of Cologne and her companions, martyrs at Cologne (c. 451)

Saint Cilinia, the mother of St Principius, Bishop of Soissons and St Remigius, Bishop of Rheims (c. 458)

Saint Fintan Munnu (Finian), of Teachmunnu, Ireland (635)

Saint Tuda of Lindisfarne, Bishop of Lindisfarne (c. 664)

Saint Condedus (Condé, Condède), a hermit at Fontaine-de-Saint-Valéry in the north of France (c. 690)

Saint Wendelin of Trier (Wendolinus, Wendel), a shepherd who was famous for his holiness and is venerated at St Wendel on the Nahe in the west of Germany (7th century)

Saint Malathgen of Cluain-Edneach, Ireland, Abbot (767)

Saint Hugh of Ambronay, third Abbot of Ambronay Abbey near Belley in France (9th–10th centuries)

Saint Maurontus, Abbot of St Victor at Marseilles, he became bishop of the same city around 767 (c. 804)

Post-Schism Orthodox saints

Saint Hilarion of Kiev, the first non-Greek Metropolitan of Kiev (c. 1055)

Venerable Hilarion the Schemamonk of the Kiev Caves (11th century)

Venerables Barnabas and Hilarion the Wonderworkers, of Peristerona, Cyprus, of the "300 Allemagne Saints" in Cyprus (12th century)

Venerable Philotheus of Neapolis and Mt. Athos (14th century)

Saints Theophilus and James, monks of Konevits, founders of Dormition Monastery at Omutch (modern-day Feofilova Pustyn'),(ru) Pskov (c. 1412)

Saint Hilarion, founder of Pskovoezersk Monastery, Gdov (1476)

Saints Bessarion (Sarai), Hieromonk (1745), and Sophronius of Ciorara, monk (c. 1765), Confessors, and St. Oprea of Săliște (18th century), martyred by the Latins in Romania.

New Martyr John of Monemvasia, Peloponnesus, at Larissa (1773)

Hieroconfessors John of Galёs, and Moses (Macinic), Priests, of Sibiel, Transylvania (18th century)

New Martyrs and Confessors

New Hieromartyr Alexis (Bui), Bishop of Voronezh (1930) (see also: February 12)

New Hieromartyrs Paulinus (Kroshechkin), Archbishop of Mogilev, and Arcadius (Yershov), Bishop of Ekaterinburg, and with them Anatole Levitsky and Nicander Chernelevsky, Priests, and New Martyr Cyprian Annikov (1937)

New Hieromartyr Damian (Voskresensky), Archbishop of Kursk (1937)

New Hieromartyrs Constantine Chekalov, Sergius Smirnov, Basil Nikolsky, Theodore Belyaev, Vladimir Vvedensky, Nicholas Raevsky, John Kozyrev, Basil Kozyrev, Alexander Bogoyavlensky, Demetrius Troitsky, and Alexis Moskvin, Priests, and Sergius Kazansky and John Melnitsky, Deacons, all of the Tver diocese (1937)

New Hieromartyrs Neophytus (Osipov), Archimandrite, of Moscow, and Sophronius (Nesmeyanov), Hieromonk, of Lozeva, Tver (1937)

New Virgin-Martyr Pelagia Testovoy (1944)

Other commemorations

Translation of the relics of St. Christodoulos the Wonderworker of Patmos (1093)

Translation of the relics (1206) of St. Hilarion, Bishop of Meglin, Bulgaria (1164)

Repose of Schema-Archimandrite Herman (Bogdanov) of New Valaam Monastery in Siberia (1938)

Repose of Schema-Nun Seraphima (Bobkova) of Shamordino Convent (1990)