October 21 (Eastern Orthodox liturgics)

The Eastern Orthodox cross

October 20 - Eastern Orthodox liturgical calendar - October 22

All fixed commemorations below celebrated on November 3 by Eastern Orthodox Churches on the Old Calendar. ^{[note 1]}

For October 21st, Orthodox Churches on the Old Calendar commemorate the Saints listed on October 8 .

Saints

• Hieromartyr Socrates, Priest, and Martyr Theodote, of Ancyra (c. 230) ^{[1] [2] [3] [note 2]}
• Martyrs Dasius, Gaius, and Zoticus at Nicomedia (303) ^{[1] [3] [4] [5] [note 3]}
• Saint Darius, Zosimus, Paul, and Secundus, martyrs of Nicaea by Diocletian (4th century) ^[7]
• Martyr Azes, by fire. ^{[3] [8] [9] [10]}
• Saints Plantinos (Platinus), Irene and Marina of Raithu. ^{[3] [9] [11] [note 4]}
• Venerable Hilarion the Great, of Gaza (371) ^{[1] [3] [10] [12] [13] [14] [note 5]}
• The 63 Martyrs of Jerusalem (724): ^{[1] [15]}

• 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) ^{[3] [9] [10] [16] [note 6]}
• Venerable Martyr Zacharias, by drowning in the sea. ^{[3] [9] [10] [17]}
• Venerable Baruch, reposed in peace. ^{[3] [9] [10] [18]}
• Venerable Phillip ^{[9] [19]}
• Venerable Jacob, Oeconomus of Batheos Rhyakos Monastery. ^{[3] [9] [20] [note 7]}

Pre-Schism Western saints

• Saint Asterius of Ostia, martyred priest (c. 223) ^{[21] [22] [note 8] [note 9]}
• Saint Viator of Lyons, hermit (389). ^{[21] [note 10] [note 11]}
• Saint Ursula of Cologne and her companions, martyrs at Cologne (c. 451) ^{[1] [9] [10] [21] [23] [24] [25] [note 12] [note 13]}
• Saint Cilinia, the mother of St Principius, Bishop of Soissons and St Remigius, Bishop of Rheims (c. 458) ^{[21] [note 14]}
• Saint Fintan Munnu (Finian), of Teachmunnu, Ireland (635) ^{[1] [9] [10] [21] [26] [27] [note 15]}
• Saint Tuda of Lindisfarne, Bishop of Lindisfarne (c. 664) ^{[21] [note 16]}
• Saint Condedus (Condé, Condède), a hermit at Fontaine-de-Saint-Valéry in the north of France (c. 690) ^{[10] [21] [note 17]}
• 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) ^{[21] [note 18]}
• Saint Malathgen of Cluain-Edneach, Ireland, Abbot (767) ^{[1] [10]}
• Saint Hugh of Ambronay, third Abbot of Ambronay Abbey near Belley in France (9th–10th centuries) ^[21]
• Saint Maurontus, Abbot of St Victor at Marseilles, he became bishop of the same city around 767 (c. 804) ^[21]

Post-Schism Orthodox saints

• Saint Hilarion of Kiev, the first non-Greek Metropolitan of Kiev (c. 1055) ^{[1] [9] [10] [29]}
• Venerable Hilarion the Schemamonk of the Kiev Caves (11th century) ^{[1] [3] [9] [10] [30] [31] [32]}
• Venerables Barnabas and Hilarion the Wonderworkers, of Peristerona, Cyprus, of the "300 Allemagne Saints" in Cyprus (12th century) ^{[3] [9] [33] [note 19]}
• Venerable Philotheus of Neapolis and Mt. Athos (14th century) ^{[1] [3] [10] [36] [37]}
• Saints Theophilus and James, monks of Konevits, founders of Dormition Monastery at Omutch (modern-day Feofilova Pustyn'),^(ru) Pskov (c. 1412) ^{[1] [10] [30] [38]}
• Saint Hilarion, founder of Pskovoezersk Monastery, Gdov (1476) ^{[1] [10] [30] [39] [40] [note 20]}
• Saints Bessarion (Sarai), Hieromonk (1745), ^{[41] [note 21]} and Sophronius of Ciorara, monk (c. 1765), ^{[42] [note 22]} Confessors, and St. Oprea of Săliște (18th century), ^[43] martyred by the Latins in Romania. ^{[1] [10]}
• New Martyr John of Monemvasia, Peloponnesus, at Larissa (1773) ^{[1] [3] [9] [10] [44]}
• Hieroconfessors John of Galёs, ^{[45] [note 23]} and Moses (Macinic), ^[46] Priests, of Sibiel, Transylvania (18th century) ^{[1] [10]}

New Martyrs and Confessors

• New Hieromartyr Alexis (Bui), Bishop of Voronezh (1930) ^{[1] [note 24]} (see also: February 12 )
• New Hieromartyrs Paulinus (Kroshechkin), Archbishop of Mogilev, ^{[note 25]} and Arcadius (Yershov), Bishop of Ekaterinburg, ^{[47] [note 26]} and with them Anatole Levitsky ^[48] and Nicander Chernelevsky, Priests, and New Martyr Cyprian Annikov (1937) ^{[1] [10] [30]}
• New Hieromartyr Damian (Voskresensky), Archbishop of Kursk (1937) ^{[1] [10] [30] [49] [note 27]}
• New Hieromartyrs Constantine Chekalov, Sergius Smirnov, Basil Nikolsky, ^[50] Theodore Belyaev, Vladimir Vvedensky, ^{[51] [note 28]} Nicholas Raevsky, John Kozyrev, ^[52] Basil Kozyrev, ^[53] Alexander Bogoyavlensky, ^[54] Demetrius Troitsky, ^[55] and Alexis Moskvin, ^[56] Priests, and Sergius Kazansky and John Melnitsky, ^[57] Deacons, all of the Tver diocese (1937) ^{[1] [10] [30]}
• New Hieromartyrs Neophytus (Osipov), Archimandrite, of Moscow, ^{[note 29]} and Sophronius (Nesmeyanov), Hieromonk, of Lozeva, Tver (1937) ^{[1] [30] [58]}
• New Virgin-Martyr Pelagia Testovoy (1944) ^{[10] [30] [58]}

Other commemorations

• Translation of the relics of St. Christodoulos the Wonderworker of Patmos (1093) ^{[1] [3] [9] [10] [59] [note 30]}
• Translation of the relics (1206) of St. Hilarion, Bishop of Meglin, Bulgaria (1164) ^{[1] [9] [10] [30] [60] [61]}
• Repose of Schema-Archimandrite Herman (Bogdanov) of New Valaam Monastery in Siberia (1938) ^[1]
• Repose of Schema-Nun Seraphima (Bobkova) of Shamordino Convent (1990) ^[1]

Icon gallery

• 
  Venerable Hilarion the Great.
• 
  Martyrs Dasius, Gaius, and Zoticus, at Nicomedia.
• 
  St. Ursula of Cologne
• 
  Saint Cilinia of Laon.
• 
  St. Wendelin of Trier.
• 
  Saint Hilarion of Kiev, Metropolitan of Kiev.
• 
  Sts. Bessarion (Sarai) and Sophronius of Ciorara, Confessors, and St. Oprea of Săliște.
• 
  New Hieromartyr Alexis (Bui), Bishop of Voronezh.
• 
  New Hieromartyr Paulinus (Kroshechkin), Archbishop of Mogilev.
• 
  New Hieromartyr Arcadius (Yershov), Bishop of Ekaterinburg.
• 
  New Hieromartyr Damian (Voskresensky), Archbishop of Kursk.

Notes

1. The notation Old Style or (OS) is sometimes used to indicate a date in the Julian Calendar (which is used by churches on the "Old Calendar").
   The notation New Style or (NS), indicates a date in the Revised Julian calendar (which is used by churches on the "New Calendar").
2. Name days celebrated today include:
   • Socrates (Σωκράτης).
3. "At Nicomedia, the birthday of the Saints Dasius, Zoticus, Caius, and twelve other soldiers, who, after suffering various torments, were submerged in the sea." ^[6]
4. His memory is recorded in the Jerusalemitic Canonarion (page 115), together with Saint Irene and Saint Marina of Raithu.
5. "IN Cyprus, the birthday of the holy abbot Hilarion. His life, full of virtues and miracles, was written by St. Jerome." ^[6]
6. In the Synaxaristes they are called "newly-revealed" Saints and were martyred under Constantine V Copronymus. Andrew was a monk from Crete, and after checking Copronymus, he was beheaded and buried in "the Judgment" (see October 17). The other three were probably monastics as well, since they staunchly defended the holy Orthodox Canons, and were also beheaded by Copronymus.
7. He is absent in the Synaxarion of St. Nicodemus. However his memory is recorded in the Synaxarion of Delahaye, without any biographical details, except for the following phrase:

   • «Μνήμη τοῦ Ὁσίου Ἰακώβου τοῦ γενομένου οἰκονόμου τῆς Μονῆς τοῦ Σωτῆρος Χριστοῦ τοῦ Βαθέος Ρύακος, ὃς ὤρμητο ἐκ τῆς δευτέρας τῶν Καππαδόκων ἐπαρχίας».

8. A Roman priest with Pope Callistus, whose body he secretly buried. For this reason he was cast into the Tiber at Ostia by order of the Emperor Alexander. Orthodox Christians recovered his body and buried it in Ostia where it is now enshrined in the Cathedral.
9. "At Ostia, St. Asterius, priest and martyr, who suffered under the emperor Alexander, as we read in the Acts of the blessed pope Callistus." ^[6]
10. A disciple of St Justus, Archbishop of Lyon in France, whom he accompanied to live as a hermit.
11. "At Lyon, St. Viator, deacon of blessed Justus, bishop of that city." ^[6]
12. "At Cologne, the birthday of the Saints Ursula and her companions, who gained the martyrs' crown by being massacred by the Huns for the Christian religion and their constancy in keeping their virginity. Many of their bodies were deposited at Cologne." ^[6]
13. Early and famous virgin-martyrs in Cologne in Germany.
14. "At Laon, St. Cilinia, mother of blessed Remigius, bishop of Rheims." ^[6] She reposed in Laon in France.
15. A disciple of St Columba at Iona, he later founded the monastery of Taghmon in Co. Wexford in Ireland. In Scotland he is called St Mundus. He bore a terrible skin disease with great patience.
16. A monk from Ireland who succeeded St Colman as Bishop of Lindisfarne in England. He died of the plague within the first year of his appointment.
17. Born in England, he became a hermit at Fontaine-de-Saint-Valéry in the north of France. On hearing of the monastery of Fontenelle, he became a monk there and later preached Christ while living on an island in the Seine near Caudebec.
18. "S. Wendelin is thought, without evidence, to have been of Scottish or Irish origin, and to have been a shepherd in the diocese of Treves. A great deal of fable has been told about him, as that he was the son of a Scottish king, who sent him to Treves to keep swine, because he was so fond of reading the psalter and praying in churches. All that is really known of him is that he was a pious shepherd, and that miracles were believed to be wrought over his body, which reposes at S. Wendel on the Nahe. A great fire broke out at Saarbruck in 1417, which was extinguished after invocation of S. Wendel, whereupon he became generally famous. He is represented as a shepherd or swineherd." ^[28]
19. The 300 Allemagne Saints came to Cyprus from Palestine, and lived as ascetics in various parts of the island. According to some of their lives in the Great Synaxaristes, after the dissolution of the Second Crusade (1147–1149), they decided to live the monastic life in the Jordan desert. However since the Latins there disturbed them, they relocated to Cyprus and dispersed over the island. ^{[34] [35]}
20. See: (in Russian) Иларион Гдовский. Википе́дия. (Russian Wikipedia).
21. See: (in Romanian) Visarion Sarai. Wikipedia. (Romanian Wikipedia).
22. See: (in Romanian) Sofronie de la Cioara. Wikipedia. (Romanian Wikipedia).
23. See: (in Romanian) Ioan din Galeș. Wikipedia. (Romanian Wikipedia).
24. See: (in Russian) Алексий (Буй). Википе́дия. (Russian Wikipedia).
25. See: (in Russian) Павлин (Крошечкин). Википе́дия. (Russian Wikipedia).
26. See: (in Russian) Аркадий (Ершов). Википе́дия. (Russian Wikipedia).
27. See: (in Russian) Дамиан (Воскресенский). Википе́дия. (Russian Wikipedia).
28. See: (in Russian) Введенский, Владимир Дмитриевич. Википе́дия. (Russian Wikipedia).
29. See: (in Russian) Неофит (Осипов). Википе́дия. (Russian Wikipedia).
30. His feast day is on March 16.

References

1. October 21 / November 3. Orthodox Calendar (PRAVOSLAVIE.RU).
2. Great Synaxaristes: (in Greek) Οἱ Ἅγιοι Θεοδότη καὶ Σωκράτης ὁ Πρεσβύτερος. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
3. (in Greek) Συναξαριστής. 21 Οκτωβρίου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).
4. Great Synaxaristes: (in Greek) Οἱ Ἅγιοι Γάϊος, Δάσιος καὶ Ζωτικὸς οἱ Μάρτυρες. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
5. Martyr Dasius at Nicomedia. OCA - Lives of the Saints.
6. The Roman Martyrology. Transl. by the Archbishop of Baltimore. Last Edition, According to the Copy Printed at Rome in 1914. Revised Edition, with the Imprimatur of His Eminence Cardinal Gibbons. Baltimore: John Murphy Company, 1916. p. 325.
7. "Указатель 4, Полный месяцеслов Востока. Том II. Святой Восток - архиепископ Сергий (Спасский)". azbyka.ru (in Russian). Retrieved 2023-08-05.
8. Great Synaxaristes: (in Greek) Ὁ Ἅγιος Ἀζῆς ὁ Μάρτυρας. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
9. (in Greek) 21/10/2017. Ορθόδοξος Συναξαριστής.
10. November 3 / October 21. HOLY TRINITY RUSSIAN ORTHODOX CHURCH (A parish of the Patriarchate of Moscow).
11. Great Synaxaristes: (in Greek) Ὁ Ἅγιος Πλαντῖνος. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
12. Great Synaxaristes: (in Greek) Ὁ Ὅσιος Ἱλαρίων ὁ Μέγας. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
13. Venerable Hilarion the Great. OCA - Lives of the Saints.
14. Rev. Sabine Baring-Gould (M.A.). "S. HILARION, H. (A.D. 371.)" In: The Lives of the Saints. Volume the Twelfth: October – Part II. London: John C. Nimmo, 1898. pp. 506-530.
15. The Autonomous Orthodox Metropolia of Western Europe and the Americas (ROCOR). St. Hilarion Calendar of Saints for the year of our Lord 2004. St. Hilarion Press (Austin, TX). p. 78.
16. Great Synaxaristes: (in Greek) Οἱ Ἅγιοι Ἀνδρέας, Στέφανος, Παῦλος καὶ Πέτρος οἱ Μάρτυρες. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
17. Great Synaxaristes: (in Greek) Ὁ Ἅγιος Ζαχαρίας ὁ Ὁσιομάρτυρας. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
18. Great Synaxaristes: (in Greek) Ὁ Ὅσιος Βαροῦχ. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
19. Great Synaxaristes: (in Greek) Ὁ Ὅσιος Φίλιππος. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
20. Great Synaxaristes: (in Greek) Ὁ Ὅσιος Ἰάκωβος. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
21. October 21. Latin Saints of the Orthodox Patriarchate of Rome.
22. Rev. Sabine Baring-Gould (M.A.). "S. ASTERIUS, P.M. (A.D. 222.)" In: The Lives of the Saints. Volume the Twelfth: October – Part II. London: John C. Nimmo, 1898. pp. 505-506.
23. Great Synaxaristes: (in Greek) Ἡ Ἁγία Ursula (Βρεταννίδα). 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
24. Rev. Richard Stanton. A Menology of England and Wales, or, Brief Memorials of the Ancient British and English Saints Arranged According to the Calendar, Together with the Martyrs of the 16th and 17th Centuries. London: Burns & Oates, 1892. pp. 508-510.
25. Rev. Sabine Baring-Gould (M.A.). "SS. URSULA AND ELEVEN THOUSAND, VV. MM. (A.D. 451.)" In: The Lives of the Saints. Volume the Twelfth: October – Part II. London: John C. Nimmo, 1898. pp. 535-556.
26. Great Synaxaristes: (in Greek) Ὁ Ἅγιος Finan (Ἰρλανδός). 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
27. Rev. Sabine Baring-Gould (M.A.). "S. FINTAN MUNNU, AB. (A.D. 635.)" In: The Lives of the Saints. Volume the Twelfth: October – Part II. London: John C. Nimmo, 1898. pp. 556-560.
28. Rev. Sabine Baring-Gould (M.A.). "S. WENDELIN, H.C. (7TH CENTURY.)" In: The Lives of the Saints. Volume the Twelfth: October – Part II. London: John C. Nimmo, 1898. p. 561.
29. St. Hilarion, Metropolitan of Kiev. OCA - Lives of the Saints.
30. (in Russian) 21 октября по старому стилю / 3 ноября по новому стилю. Русская Православная Церковь - Православный церковный календарь на 2016 год.
31. Venerable Hilarion the Schemamonk of the Kiev Caves. OCA - Lives of the Saints.
32. (in Russian) ИЛАРИОН. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
33. Great Synaxaristes: (in Greek) Οἱ Ὅσιοι Βαρνάβας καὶ Ἱλαρίων οἱ Θαυματουργοί. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
34. Great Synaxaristes: (in Greek) Ὁ Ὅσιος Ἀναστάσιος ὁ Θαυματουργός ὁ ἐν Κύπρῳ. 17 Σεπτεμβρίου. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
35. Great Synaxaristes: (in Greek) Ὁ Ὅσιος Ἀββακοὺμ ὁ ἀσκητὴς. 2 Δεκεμβρίου. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
36. Great Synaxaristes: (in Greek) Ὁ Ὅσιος Φιλόθεος ὁ Ἀσκητὴς ἐν Ἄθῳ. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
37. Venerable Philotheus of Dionysiou of Mt Athos. OCA - Lives of the Saints.
38. Venerable Theophilus the Abbot of Omutch, Pskov. OCA - Lives of the Saints.
39. Venerable Hilarion the Abbot of Gdov and Pskov Lake. OCA - Lives of the Saints.
40. (in Russian) ИЛАРИОН. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
41. Venerable Bessarion Sarai the Confessor in Romania. OCA - Lives of the Saints.
42. St. Sophronius the Confessor of Ciorara in Romania. OCA - Lives of the Saints.
43. Martyr Oprea of Salistie in Romania. OCA - Lives of the Saints.
44. Great Synaxaristes: (in Greek) Ὁ Ἅγιος Ἰωάννης ὁ Νεομάρτυρας. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
45. St. John of Galesh. OCA - Lives of the Saints.
46. St. Moses (Macinic), Martyr and Confessor. OCA - Lives of the Saints.
47. (in Russian) АРКАДИЙ. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
48. (in Russian) АНАТОЛИЙ. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
49. (in Russian) ДАМИАН. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
50. (in Russian) ВАСИЛИЙ. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
51. (in Russian) ВЛАДИМИР. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
52. (in Russian) ИОАНН. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
53. (in Russian) ВАСИЛИЙ. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
54. (in Russian) АЛЕКСАНДР. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
55. (in Russian) ДИМИТРИЙ. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
56. (in Russian) АЛЕКСИЙ. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
57. (in Russian) ИОАНН. Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
58. (in Russian) 3 ноября (21 октября). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
59. Great Synaxaristes: (in Greek) Ἀνακομιδὴ Τιμίων Λειψάνων Ὁσίου Χριστοδούλου τοῦ Θαυματουργοῦ. 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
60. Great Synaxaristes: (in Greek) Ἀνακομιδὴ Τιμίων Λειψάνων Ὁσίου Ἱλαρίωνος Ἐπισκόπου Μεγληνίας (Ρῶσος). 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
61. Translation of the relics of St Hilarion the Bishop of Meglin in Bulgaria. OCA - Lives of the Saints.

Sources

• October 21 / November 3. Orthodox Calendar (PRAVOSLAVIE.RU).
• November 3 / October 21. HOLY TRINITY RUSSIAN ORTHODOX CHURCH (A parish of the Patriarchate of Moscow).
• October 21. OCA - The Lives of the Saints.
• The Autonomous Orthodox Metropolia of Western Europe and the Americas (ROCOR). St. Hilarion Calendar of Saints for the year of our Lord 2004. St. Hilarion Press (Austin, TX). p. 78.
• The Twenty-First Day of the Month of October. Orthodoxy in China.
• October 21. Latin Saints of the Orthodox Patriarchate of Rome.
• The Roman Martyrology. Transl. by the Archbishop of Baltimore. Last Edition, According to the Copy Printed at Rome in 1914. Revised Edition, with the Imprimatur of His Eminence Cardinal Gibbons. Baltimore: John Murphy Company, 1916. p. 325.
• Rev. Richard Stanton. A Menology of England and Wales, or, Brief Memorials of the Ancient British and English Saints Arranged According to the Calendar, Together with the Martyrs of the 16th and 17th Centuries. London: Burns & Oates, 1892. pp. 508–510.

Greek Sources

• Great Synaxaristes: (in Greek) 21 ΟΚΤΩΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
• (in Greek) Συναξαριστής. 21 Οκτωβρίου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).
• (in Greek) 21/10/2017. Ορθόδοξος Συναξαριστής.

Russian Sources

• (in Russian) 3 ноября (21 октября). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
• (in Russian) 21 октября по старому стилю / 3 ноября по новому стилю. Русская Православная Церковь - Православный церковный календарь на 2016 год.