September 24 - Eastern Orthodox liturgical calendar - September 26

All fixed commemorations below celebrated on October 8 by Eastern Orthodox Churches on the Old Calendar.^{[note 1]}

For September 25th, Orthodox Churches on the Old Calendar commemorate the Saints listed on September 12.

• Monk-martyr Paphnutius and 546 companions, in Egypt (c. 303)^[1][2][3][4] (see also: April 19 )
• Martyrs Paul and Tatta and their children Sabinian, Maximos, Rufus, and Eugene, of Damascus.^{[1][5][6][note 2]}
• Venerable Euphrosyne of Alexandria, nun,^{[8][9][note 3]} and her father Venerable Paphnutius,^[10] monk (5th century)^[1][6]
• Venerable Theophilos the Confessor, Archbishop of Ephesus.^{[3][6][11][note 4]}
• Saint Arsen the Great, Catholicos of Georgia (887)^{[1][12][13][14][note 5]}

• Saints Aurelia and Neomisia, at Anagni, peacefully.^{[7][15][note 6]}
• Saint Herculanus, a soldier martyred in Rome.^{[15][note 7]}
• Saint Firminus of Amiens, First Bishop of Amiens (4th century)^{[15][note 8][note 9]}
• Saint Caian of Tregaian (5th century)^{[15][note 10]}
• Saint Principius, the elder brother of St Remigius of Rheims, he became Bishop of Soissons in France (c. 505)^{[15][note 11]}
• Saint Solemnis (Soleine, Solen), Bishop of Chartres (511)^{[15][note 12]}
• Saint Lupus of Lyons, Archbishop of Lyons (542)^{[15][note 13][note 14]}
• Saint Cadoc, Abbot, of Llancarfan (580)^[1][12] (see also: January 24 )
• Saint Anacharius (Aunacharius, Aunachaire, Aunaire), Bishop of Auxerre and Confessor (604)^{[7][15][note 15]}
• Saint Finbarr of Cork (Barrocus, Barry), first Bishop of Cork (c. 633)^[1][12][15]
• Saint Ermenfridus, a monk at Luxeuil Abbey in France, who later founded the monastery of Cusance (c. 670)^[15]
• Saint Mewrog, a saint in Wales.^[15]
• Saint Fymbert, a bishop in the west of Scotland (7th century)^[15]
• Saint Ceolfrith (Ceolfrid, Geoffrey), Abbot, of Wearmouth-Jarrow Monastery (716)^{[1][15][16][note 16]}
• Saint Egelred, a monk at Crowland Abbey in England, martyred with his abbot and many others by the heathen Danes (c. 869)^[15]

• Saint Byzantinos.^{[3][6][17][note 17]}
• Venerable Euphrosyne of Suzdal, nun (1250)^{[1][12][18][19][note 18]}
• Repose of Venerable Sergius of Radonezh, Abbot of Radonezh and Wonderworker of All Russia (1392)^{[1][6][12][18][20][21]}
• Saint Pimen (Cherny), archbishop of Novgorod (1571)^[22]
• Saint Dosithea the Recluse, of the Kiev Caves (1776)^{[1][12][18][23][note 19][note 20]}

• Commemoration of the earthquake in Constantinople in 447, when a boy was lifted up to heaven and heard the "Trisagion".^{[1][3][12][25]}
• First translation of the relics (1595) of St. Herman, Archbishop of Kazan (1567)^{[1][12][18][26][27][note 21]}
• Repose of philosopher Alexei Stepanovich Khomiakov, cofounder of the Slavophile movement (1860)^{[1][note 22]}
• Uncovering of the relics of hieromartyrs Alexander Smirnov and Theodore Remizov, Presbyters (1985)^[18][24]

• Monk-martyr Paphnutius, crucified.
• Venerable Euphrosyne of Alexandria.
• Venerable Euphrosyne of Alexandria.
• Venerable Euphrosyne of Suzdal.
• Venerable Sergius of Radonezh, Abbot of Radonezh and Wonderworker of All Russia.
• Commemoration of earthquake in Constantinople in 447, when a boy was lifted up to heaven and heard the "Trisagion"
• St. Herman, Archbishop of Kazan.