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May 18 - Eastern Orthodox Church calendar - May 20

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

For May 19th, Orthodox Churches on the Old Calendar commemorate the Saints listed on May 6.

• Hieromartyrs Patricius (Patrick), Bishop of Prusa, and with him the Presbyters Acacius, Menander, and Polyenos (c. 100^[1] or c. 362^[2])^{[3][4][note 2]}
• Martyrs Calocerus and Parthenius, brothers (250)^{[6][7][8][note 3]}
• Martyr Philoterus of Nicomedia (303)^[7][10]
• Martyr Acoluthus of the Thebaid (303)^{[11][note 4]}
• Martyr Cyriaca (Kyriake) and the six holy virgin-martyrs in Nicomedia (307)^[7][12]
• Martyr Theotima of Nicomedia (c. 311)^[1][13]
• Saint John, Bishop of the Goths in Crimea (787)^[1][2]

• Martyr Pudens, the senator (c. 160)^[7][8][14]
• Virgin-Martyr Pudentiana (Potentiana), daughter of Saint Pudens the senator (160)^{[7][8][15][16]}
• Saint Cyril of Trier, Bishop of Trier, (5th century)^[8][17]
• Saint Adolphus (Hadulf), ascetic of the Benedictine Abbey of St. Vaast, in Arras, and later Bishop of Arras Cambrai in the north of France (728)^[8][18]
• Saint Dunstan, Archbishop of Canterbury (988)^[8][19][20]

• Monk-martyrs and Confessors of the Monastery of Panagia of Kantara, on Cyprus, who suffered under the Latins (1231):^[1][21]

• Barnabas, Gennadius, Gerasimus, Germanus (Herman), Theognostus, Theoctistus, Jeremiah, John, Joseph, Conon, Cyril, Maximus and Mark.

• Right-Believing Great Prince Dmitry Donskoy, Great Prince of Moscow (1389)^{[1][2][22][23][note 5]}
• Venerable Eudoxia of Moscow (in monasticism Euphrosyne), Grand-Duchess of Moscow (1407)^[25][26]
• Venerable Sinaites of Serbia (from Ravanica) (14th century):^{[27][note 6]}

• Romulus, Romanus, Nestor, Sisoes, Zosimas, Gregory, Nicodemus, and Cyril, the Sinaites. - disciples of Gregory of Sinai (Mount Athos).

• Saint Cornelius of Paleostrov, Abbot (1420)^[1][28]
• Saint John (Ignatius), Prince of Uglich, tonsured as Ignatius in Vologda (1522)^[1][29]
• Venerable Cornelius of Komel (Vologda), Abbot and Wonderworker (1537)^[1][30]
• Saint Sergius of Shukhtov (Shukhtom), monk (1609)^[1][31]

• Hieromartyr Matthew Voznesensky (1919)^[22][32]
• Hieromartyr Innocent (Letayev), Archbishop of Kharkiv (1937)^[9]
• Hieromartyr Victor Karakulin (1937)^[2][22]
• Hieromartyr Onuphrius (Gagaliuk), Archbishop of Kursk and Oboyansk (1938),^[1][22][33] (see also June 1) and:

• Hieromartyr: Anthony, Bishop of Belgorod;^[22]
• Hieromartyrs: Mitrophanes Vilgelmsky, Alexander Yeroshov, Michael Deineka, Hippolytus Krasnovsky, Nicholas Kulakov, Basil Ivanov, Nicholas Sadovsky, Maximus Bogdanov, Alexander Saulsky, Paul Bryantsev, and Paul Popov - Priests;^[22][32]
• Martyrs: Michael (Voznesensky) and Gregory (Bogoyavlensky) (1938)^{[1][2][22][32]}

• New Hieromartyr Valentine Lukyanov (1940)^[2][22]
• All New Hieromartyrs of Slobozhanschyna (Slobodskaya) Ukraine (1937,1938,1940,1941)^{[9][34][note 7][note 8]}

• Entrance into Georgia (323) of Saint Nina (Nino), Equal-to-the-Apostles (335)^[1][36]
• Translation of the sacred relics of Saints Julius the Presbyter (401) and Julianus (Giuliano) the Deacon (391)^[37]
• Repose of Schemamonk Cyriacus of Valaam (1798)^[1]
• Repose of Righteous Nicholas Rynin of Vologda (1837)^[1]
• Commemoration of the ascetics of St. Anthony of Syadem Monastery: Elias (also of Valaam), Theophanes, and Dionysius.^[1]
• Synaxis of Hieromartyrs of Kharkiv.^[1][2]
• Slaying of Priest John Karastamatis of Santa Cruz (1985)^[38] (see also: May 6)

• 
  St. Pudens.
• 
  St. Pudentiana.
• 
  Apse mosaic from the Church of Santa Pudenziana, Rome.
• 
  St. Dunstan.
• 
  St. Dmitry Donskoy.
• 
  St. Onuphrius (Gagaliuk), Archbishop of Kursk and Oboyansk.
• 
  St. Nino, Equal-to-the-Apostles.
• 
  St. Julius of Novara.

• May 19/June 1. Orthodox Calendar (PRAVOSLAVIE.RU).
• June 1 / May 19. HOLY TRINITY RUSSIAN ORTHODOX CHURCH (A parish of the Patriarchate of Moscow).
• Dr. Alexander Roman. May. Calendar of Ukrainian Orthodox Saints (Ukrainian Orthodoxy - Українське Православ'я).
• May 19. Latin Saints of the Orthodox Patriarchate of Rome.
• May 19. The Roman Martyrology.

Greek Sources

• Great Synaxaristes: (in Greek) 19 ΜΑΪΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
• (in Greek) Συναξαριστής. 19 Μαΐου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).

Russian Sources

• (in Russian) 1 июня (19 мая). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
• (in Russian) 19 мая (ст.ст.) 1 июня 2013 (нов. ст.). Русская Православная Церковь Отдел внешних церковных связей. (DECR).