May 13 - Eastern Orthodox Church calendar - May 15

All fixed commemorations below celebrated on May 27 by Orthodox Churches on the Old Calendar.^{[note 1]}

For May 14th, Orthodox Churches on the Old Calendar commemorate the Saints listed on May 1.

• Martyr Maximus of Rome, under Decius (250)^[1][2]
• Martyr Isidore of Chios (251)^[1][3]
• Saints Alexander, Barbaras, and Acolythus (Acolouthus), martyred at the Church of St Irene (Holy Peace), near the sea in Constantinople.^[1][4]
• Martyrs Aristotle and Leandros.^[5]
• Saint Boniface of Tarsus, martyr (307)^[6][7][8]
• Venerable Serapion the Sindonite, monk of Egypt (5th century)^{[1][9][note 2][note 3]}
• Hieromartyr Therapontus, Bishop of Cyprus (632)^{[1][10][note 4][note 5]}

• Martyrs Justa, Justina and Henedina, in Sardinia (c. 130)^[6][7]
• Saint Pontius of Cimiez (Pons de Cimiez), martyred in Cimella (Cimiez) near Nice, whose relics gave his name to the town of Saint-Pons. (c. 258)^{[6][7][12][note 6]}
• Saint Aprunculus (Apruncule), first bishop of Langres, later of Clermont, Gaul (c. 488)^[1]
• Saint Boniface, Bishop of Ferentino in Tuscany (6th century)^[6]
• Saint Carthage (Carthach Mochuda) the Younger, founder and first abbot of Lismore (637)^[6][13][14]
• Saint Erembert, Bishop of Toulouse (657)^[6]
• Saint Tuto (Totto), monk and Abbot of St Emmeram in Regensburg in Germany, where he later became bishop (930)^[6]
• Saint Hallvard, of the royal family of Norway, patron saint of Oslo, martyr (1043)^[6][15] (see also: May 15)

• Saint Nicetas, Bishop of Novgorod and recluse of the Kiev Caves (1108)^{[1][16][note 7]}
• Saint Leontius II of Jerusalem, Patriarch of Jerusalem (1190)^{[1][17][18][19]}
• Saint Isidore of Rostov, Fool-for-Christ and Wonderworker (1474)^{[1][20][note 8]}
• New Martyr Mark of Crete, at Smyrna (1643)^[1][21]
• New Martyr John of Bulgaria (Raiko-John of Shumena), the goldsmith (1802)^[1][22][23]
• Saint Andrew, Abbot of the Holy Trinity–St. Raphael Monastery, Tyumen (1820)^{[1][24][25][note 9]}
• Synaxis of the Saints of Starobilsk, Luhansk Oblast (2014)^{[26][note 10]}

• New Hieromartyr Peter Rozhdestvin, Archpriest, of Lanino, Ryazan (1939)^{[1][19][24][27]}
• New Hiero-confessor Matthew, Hieromonk, of Yaransk (1927)^[1] (see also: May 16)

• Commemoration of the martyrdom by the Poles (1609),^[1] of:

• Abbot Anthony with 40 monks and 1,000 laymen of the St. Paisius of Uglich Monastery;^[28] and
• Abbot Daniel with 30 monks and 200 laymen of the St. Nicholas Monastery, Kostroma.^[29]

• Synaxis of the Yaroslavsk-Pechersk Icon of the Mother of God (1823)^{[30][31][32][note 11]}
• First uncovering of the relics (1846) of Saint Tikhon, Bishop of Voronezh, Wonderworker of Zadonsk (1783)^{[1][24][note 12]}

• 
  Byzantine Pilgrim Stamp of Saint Isidore (6th century).
• 
  Translation of the relics of St. Isidore to Venice (Mosaic, St. Isidore chapel, in the Basilica of San Marco).
• 
  St. Boniface of Tarsus (Bonifatius).
• 
  St. Erembert, Bishop of Toulouse.
• 
  St. Hallvard, patron saint of Oslo.
• 
  St. Nicetas, Bishop of Novgorod.
• 
  St. Leontius II of Jerusalem, Patriarch of Jerusalem.
• 
  Yaroslavsk-Pechersk Icon of the Mother of God.

• May 14/27. Orthodox Calendar (PRAVOSLAVIE.RU).
• May 27 / May 14. HOLY TRINITY RUSSIAN ORTHODOX CHURCH (A parish of the Patriarchate of Moscow).
• May 14. OCA - The Lives of the Saints.
• May 14. Latin Saints of the Orthodox Patriarchate of Rome.
• May 14. The Roman Martyrology.

Greek Sources

• Great Synaxaristes: (in Greek) 14 ΜΑΪΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
• (in Greek) Συναξαριστής. 14 Μαΐου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).

Russian Sources

• (in Russian) 27 мая (14 мая). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
• (in Russian) 14 мая (ст.ст.) 27 мая 2013 (нов. ст.). Русская Православная Церковь Отдел внешних церковных связей. (DECR).