October 27 (Eastern Orthodox liturgics)
- Eastern Orthodox liturgical calendar - October 28
All fixed commemorations below celebrated on November 9 by Eastern Orthodox Churches on the Old Calendar.
For October 27th, Orthodox Churches on the Old Calendar commemorate the Saints listed on October 14.Saints
- Saint Claudia Procula, wife of Pontius Pilate
- Martyrs Capitolina and Eroteis, of Cappadocia
- Martyrs Mark of the island of Thasos and those with him
- Martyr Nestor of Thessaloniki
- Martyrs Mabrianos and Valentine.
- Saint Kyriakos II, Patriarch of Constantinople
Pre-Schism Western saints
- Saint Florentius, a martyr in Trois-Châteaux in Burgundy in France
- Martyrs Vincent, Sabina and Christeta, martyrs in Avila in Spain
- Saint Gaudiosus of Naples, Bishop of Abitina in North Africa
- Saint Namatius, ninth Bishop of Clermont in France
- Saint Abbán, founder of many monasteries, mostly in the south of Ireland
- Saint Oran of Iona, monk of Iona Abbey
- Saint Desiderius of Auxerre, Bishop of Auxerre in France
- Saint Colman of Senboth-Fola, a disciple of St Aidan of Ferns, he was Abbot of Senboth-Fola, near Ferns
Post-Schism Orthodox saints
- Venerable Nestor the Chronicler, of the Kiev Caves
- Venerable Nestor the Unlettered, of the Far Kiev Caves
- Venerable Demetrius of :bg:Басарбово|Basarabov in Bulgaria
- Saint Alexander, Bishop of Guria and Mingrelia, Georgia
New Martys and Confessors
- New Hieromartyr Sergius, Abbot, of Danilov Monastery, Moscow
Other commemorations
- Narrative about the Iberians, involving a certain ascetic woman who healed the sick, including their queen, converting many to Christ
- Uncovering of the relics, in Pereyaslavl-Zalessky, of St. Andrew, Prince of Smolensk
- Repose of Hieroschemamonk Antiochus of Svir, disciple of Elder Theodore of Svir
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