September 25 (Eastern Orthodox liturgics)

Saints

• Martyrs Paul and Tatta and their children Sabinian, Maximos, Rufus, and Eugene, of Damascus. Venerable Euphrosyne of Alexandria, nun, 'and her father Venerable Paphnutius, monk'
• Venerable Theophilos the Confessor, Archbishop of Ephesus.
• Saint Arsen the Great, Catholicos of Georgia

Pre-Schism Western saints

• Saints Aurelia and Neomisia, at Anagni, peacefully.
• Saint Herculanus, a soldier martyred in Rome.
• Saint Firminus of Amiens, First Bishop of Amiens
• Saint Caian of Tregaian
• Saint Principius, the elder brother of St Remigius of Rheims, he became Bishop of Soissons in France
• Saint Solemnis, Bishop of Chartres
• Saint Lupus of Lyon, Archbishop of Lyon
• Saint Cadoc, Abbot, of Llancarfan
• Saint Anacharius, Bishop of Auxerre and Confessor
• Saint Finbarr of Cork, first Bishop of Cork
• Saint Ermenfridus, a monk at Luxeuil Abbey in France, who later founded the monastery of Cusance
• Saint Mewrog, a saint in Wales.
• Saint Fymbert, a bishop in the west of Scotland
• Saint Ceolfrith, Abbot, of Wearmouth-Jarrow Monastery
• Saint Egelred, a monk at Crowland Abbey in England, martyred with his abbot and many others by the heathen Danes

Post-Schism Orthodox saints

• Saint Byzantinos.
• Venerable Euphrosyne of Suzdal, nun Repose of Venerable Sergius of Radonezh, Abbot of Radonezh and Wonderworker of All Russia
• Saint Pimen, archbishop of Novgorod
• Saint Dosithea the Recluse, of the Kiev Caves

New martyrs and confessors

• Saint Nicholas Rozov the Confessor, Priest

Other commemorations

• Commemoration of the earthquake in Constantinople in 447, when a boy was lifted up to heaven and heard the "Trisagion".
• First translation of the relics of St. Herman, Archbishop of Kazan
• Repose of philosopher Alexei Stepanovich Khomiakov, cofounder of the Slavophile movement
• Uncovering of the relics of hieromartyrs Alexander Smirnov and Theodore Remizov, Presbyters