September 15 (Eastern Orthodox liturgics)

• Afterfeast of the Exaltation of the Cross.^[1][2][3]

• Martyrs Maximus,^[4][5] Theodotus, and Asclepiodota, of Adrianopolis (305-311)^[1][3][6] (see also: September 17)
• Holy Two Virgin-Martyrs, by the sword.^[7]
• Martyr Porphyrius the Mime, of Caesarea (361)^{[1][5][8][9][note 2]} (see also: November 4)
• Great-martyr Nicetas the Goth and those with him (372)^{[1][3][5][11][12][note 3][note 4]}
• Saint Joseph, Abbot of Alaverdi Monastery in Georgia (570)^{[1][3][13][14][15]}
• Venerable Philotheos the Presbyter of Asia Minor, Wonderworker (10th century)^{[1][5][16][17]}
• Venerable Sabinus, a bishop who became a monastic.^[18]

• Saint Nicomedes, by tradition he was a priest martyred in Rome, perhaps under Domitian (c. 90)^{[19][note 5]}
• Saint Valerian, a companion of St Photinus (Pothinus) of Lyons in France (178)^{[19][note 6][note 7]}
• Saint Albinus (Aubin, Alpin), Bishop of Lyons (c. 390)^{[10][19][note 8]}
• Saint Mamilian of Palermo, Bishop of Palermo in Sicily (460)^{[19][note 9]}
• Saint Aprus (Aper, Apre, Epvre, Evre), Bishop of Toul (507)^{[10][19][note 10]}
• Saint Leobinus (Lubin), Abbot of Brou, then Bishop of Chartres (c. 556)^{[10][19][note 11]}
• Saint Hernin (Hernan), a hermit in Brittany at a place called Loc-Harn after him (6th century)^{[19][note 12]}
• Saint Merinus (Merin, Merryn, Meadhran), abbot of Paisley Abbey (c. 620)^{[14][19][note 13]}
• Saint Aichardus (Aicard, Achard), Abbot of St Benedict's at Quinçay near Poitiers, then Abbot of Jumièges (c. 687)^{[10][19][note 14]}
• Saint Ritbert, monk and abbot of a small monastery in Varennes in France (c. 690)^[19]
• Saint Ribert, Monk and Abbot of Saint-Valèry-sur-Somme in France (7th century)^{[19][note 15]}
• Saints Emilas and Jeremiah, two young men, the former of whom was a deacon, imprisoned and beheaded in Cordoba in Spain under the Caliph Abderrahman (852)^{[19][note 16]}

• Venerable Meletios, founder of the Monastery of Sergius.^{[5][21][note 17]}
• Venerable Nicetas, Bishop of Chytri, near Kythrea, in Cyprus.^{[5][22][note 18]}
• Saint Symeon of Thessaloniki, Archbishop of Thessaloniki (1429)^{[1][3][5][14][23]}
• Saint Nicetas, disciple of St. Sergius of Radonezh and founder of the Theophany Monastery in Kostroma (15th century)^[1]
• Saints Bessarion I (1490-1499) and Bessarion II (1527-1540),^[24] Metropolitans of Larissa.^{[1][5][14][25][note 19][note 20]}
• Saint Joseph the New of Partoёs, Metropolitan of Timișoara, Romania (1656)^[1][14][26]
• Saint Gerasimos the New, founder of the sacred monastery of the Holy Trinity in Sourvia, near Makrinitsa (c. 1740)^{[1][5][27][28]}
• New Martyr John of Crete, at New Ephesus (1811)^{[1][5][29][30]}

New martyrs and confessors

• New Hieromartyr John Ilinsky, Priest (1918)^[3][14][31]
• Virgin-martyr Eudokia Tkachenko (1918)^[3][14][32]
• New Hieromartyrs Andrew Kovalev,^[33] Gregory Konokotin,^[34] Gregory Troitsky,^[35] and John Yakovlev,^[36] Priests (1921)^[3][14]
• Venerable New Hiero-confessor Ignatius (Biryukov), Archimandrite, of the Aleksievo-Akatov Monastery in Voronezh (1932)^{[1][3][14][37]}
• New Hieromartyr Demetrius Ignatenko, Priest (1935)^[3][14][38]
• New Hieromartyrs John Borozdin,^[39] Jacob Leonovich,^[40] Peter Petrikov, and Nicholas Skvortsov, Priests (1937)^[3][14]
• New Hieromartyr Nicholas Tsvetkov, Deacon (1937)^[3][14]
• Martyrs Mary Rykov and Ludmila Petrov (1937)^[3][14]

• Uncovering of the relics of St. Acacius the Confessor, bishop of Melitene in Pisidia (251)^{[1][3][14][41][42][note 21]}
• Icon of the Mother of God of Novonikita, carried by St Nicetas the Goth (372).^[3][14][43]
• Uncovering of the relics of Protomartyr and Archdeacon Stephen (415)^{[1][3][14][44]}

• 
  Martyrs Maximus, Theodotus, and Asclepiodote, of Adrianopolis.
• 
  St. Porphyrius the Mime, of Caesarea.
• 
  Great-martyr Nicetas the Goth.
• 
  Great-martyr Nicetas the Goth.
• 
  St. Mamilian of Palermo, Bishop of Palermo.
• 
  St. Symeon of Thessaloniki, Archbishop of Thessaloniki.

• September 15/September 28. Orthodox Calendar (PRAVOSLAVIE.RU).
• September 28 / September 15. HOLY TRINITY RUSSIAN ORTHODOX CHURCH (A parish of the Patriarchate of Moscow).
• September 15. 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. 69.
• The Fifteenth Day of the Month of September. Orthodoxy in China.
• September 15. 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. pp. 283–285.
• 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. p. 448.

Greek Sources

• Great Synaxaristes: (in Greek) 15 ΣΕΠΤΕΜΒΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
• (in Greek) Συναξαριστής. 15 Σεπτεμβρίου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).
• (in Greek) 15/09/2024. Ορθόδοξος Συναξαριστής.

Russian Sources

• (in Russian) 28 сентября (15 сентября). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
• (in Russian) 15 сентября по старому стилю / 28 сентября по новому стилю. Русская Православная Церковь - Православный церковный календарь на 2024 год.