April 27 (Eastern Orthodox liturgics)
April 26 - Eastern Orthodox Church calendar - April 28
All fixed commemorations below celebrated on May 10 by Orthodox Churches on the Old Calendar.
For April 27th, Orthodox Churches on the Old Calendar commemorate the Saints listed on April 14.
Saints
Saint Symeon the Kinsman of the Lord, Apostle of the Seventy and Hieromartyr- Martyr Publius, by the sword.
- Martyr Lollion the Younger.
- Saint Pollion the Reader, of Cibalis in Pannonia, burnt alive under Diocletian
- Saint Eulogius the Hospitable of Constantinople
- Saint Nicon, abbot of the Monastery of St. Gerasimus
- Saint Simeon Stylites the Younger of Cilicia, and his brother George.
- Saint John of Cathares, Abbot of Cathares Monastery at Constantinople
Pre-Schism Western saints
- Saint Liberalis of Treviso, priest from the area near Ancona in Italy who worked for the conversion of the Arians and suffered much at their hands
- Saint Theophilus, Bishop of Brescia
- Saint Maughold, Bishop of the Isle of Man
- Saint Assicus, first bishop of Elphin, Ireland, converted to Christianity by Saint Patrick
- Saint Tertullian, eighth Bishop of Bologna in Italy
- Saint Enoder
- Saint Winewald, Abbot of Beverley in England
- Saint Floribert of Liège
Post-Schism Orthodox saints
- Saint Stephen, abbot of the Kiev Caves and Bishop of Vladimir in Volhynia
- New Hieromartyr Seraphim, Bishop of Phanarion and Neokhorion
- New Martyr Elias of Mount Athos
- Saint Basil, Hieroschemamonk of Glinsk and Ploshchansk hermitages
New martyrs and confessors
- New Hieromartyrs Paul Svetozarov, Protopresbyter, and John Rozhdestvensky, Priest, and those with them:
- Virgin-martyr Mary Nosova
- New Hieromartyr John Spassky, priest of Tver
Other commemorations
- Incineration of the relics of Saint Sabbas, first Archbishop of Serbia, by Sinan Pasha
- Apparition of Our Lady of Kazan in Aleksandrovka, Saint Petersburg Governorate
- Glorification of New Hieromartyr Hilarion (Troitsky), Archbishop of Verey