April 18 (Eastern Orthodox liturgics)
April 17 - Eastern Orthodox liturgical calendar - April 19
All fixed commemorations below are observed on May 1 by Orthodox Churches on the Old Calendar.
For April 18th, Orthodox Churches on the Old Calendar commemorate the Saints listed on April 5.
Saints
- Martyrs Victor, Zoticus, Zeno, Acindynus, and Severian, of Nicomedia
- Martyr Sabbas the Goth, at Buzau in Wallachia
- Saint Acacius II, Bishop of Melitene
- Saint Cosmas, Bishop of Chalcedon, and his fellow-ascetic St. Auxentius Venerable John the Righteous, disciple of St. Gregory of Decapolis
- Venerable Naucratius, Abbot of the Studion Venerable Athanasia the Wonderworker, Abbess, of Aegina
- Venerable Matthew, acquaintance of St. Athanasia the Wonderworker
- Venerable Euthymius the Wonderworker.
Pre-Schism Western saints
- Saint Eleutherius, Bishop of Illyria, his mother Anthia, and eleven others, martyred in Illyria under Hadrian
- Martyr Corebus, a prefect of Messina in Sicily, converted to Christ by St Eleutherius and martyred under the Emperor Hadrian
- Martyr Calocerus, an officer of the Emperor Hadrian martyred in Brescia in Italy
- Saint Apollonius the Apologist, a Roman senator, denounced as a Christian by one of his own slaves and condemned to be beheaded
- Saints Bitheus and Genocus, two monks from Britain who accompanied St Finian of Clonard to Ireland
- Saint Laserian, founder of the monastery and bishopric of Leighlin in Ireland
- Saint Deicola, born in Ireland, he preached Christ in England in Norfolk and in Sussex
- Saint Agia, wife of St Hidulf of Hainault in Belgium, monastic at the convent of Mons
- Saint Wicterp, Abbot of Ellwangen Abbey in Germany, later became the tenth Bishop of Augsburg
- Saint Cogitosus, a monk at Kildare in Ireland who probably wrote the Life of St Brigid
- Saint Perfectus, a priest in Cordoba in Spain, martyred by Muslims on Easter Sunday
Post-Schism Orthodox saints
Venerable Basil the Georgian, Wonderworker, of Iveron Monastery, Mt. Athos Venerable Euthymius the Enlightener of Karelia, and righteous laymen Anthony and Felix of Karelia.- New Martyr John the Tailor, of Ioannina, at Constantinople
- Venerable new martyr John
- Martyr Tunom, Arab Emir who confessed Christ on seeing the Holy Fire in Jerusalem Hieromartyr Cyril VI of Constantinople, Ecumenical Patriarch of Constantinople
New martyrs and confessors
- New Hieromartyr Bessarion Selinin, Priest
- New Hieromartyr Alexis Krontenkov, Priest, of Ekaterinburg
- New Hieromartyrs Nicholas and Basil Derzhavin, Priests, and martyred lay people of the city of Gorodets, Nizhni-Novgorod.
- New Martyr Tamara, Abbess, of Cheboksara
Other commemorations
- Icon of the Most Holy Theotokos "Glykophilousa".
- Icon of the Mother of God of St Maximus