Martyr
Martyrs Isaac, Apollos and Quadratus († 303)
In Russian: Мчч. Исакия, Аполлоса и Кодрата (303)
In Church Slavonic: Ст҃ы́хъ мꙋ́чєникъ Исакия, а҆поллѡ́са и҆ кодра́та (303)
Feast days
2026
Old calendar
- (21 April on the Old calendar), repose
New calendar
- , repose
2027
Old calendar
- (21 April on the Old calendar), repose
New calendar
- , repose
Also commemorated on 4 May 2026
- Hieromartyr Januarius Bishop of Beneventum, and the deacons Proculus, Sossius and Faustus, Desiderius the Reader, Eutychius and Acution, laymen († c. 305)
- Holy Martyrs Theodore, his mother Philippa, Dioscorus, Socrates and Dionysius of Perge in Pamphylia (2nd C)
- Finding of the relics of Venerable Theodore of Sanaxara († 1999)
- Righteous Alexis of Bortsurman († 1848)
- New Hieromartyr Priest John († 1918)
- New Hieroconfessor Priest Nicholas († 1933)
- New Hieromartyr Priest Alexis († 1938)
- Holy Hierarch Maximian, Patriarch of Constantinople († 434)