Martyr
Holy Martyrs Simeon, Isaac and Bachtisius in Persia (4th C)
In Russian: Мчч. Симеона, Исаака и Вахтисия (IV)
In Church Slavonic: Ст҃ы́хъ мꙋ́чєникъ сѷмеѡ́на, і҆саа́ка и҆ Вахтисия (д҃)
Feast days
2026
Old calendar
- (18 May on the Old calendar), repose
New calendar
- , repose
2027
Old calendar
- (18 May on the Old calendar), repose
New calendar
- , repose
Also commemorated on 31 May 2026
- ✠Pentecost. Sunday of the Holy Trinity. Descent of the Holy Spirit on the Apostles
- Commemoration of the Holy Fathers of Seven Ecumenical Councils
- Holy Martyr Theodotus of Ancyra and the Holy Seven Virgin-martyrs Alexandra, Tecusa, Claudia, Phaine, Euphrasia, Matrona, and Julia († 303)
- Holy Martyrs Peter, Dionysius, Andrew, Paul, and Christina, who suffered under emperor Decius († 249-251)
- Venerable Macarius of Altai († 1847)
- New Hieromartyr Priest Michael († 1932)
- New Hieromartyr Priest Basil († 1942)
- Holy Martyrs Heraclius, Paulinus, Benedimus
- Holy Martyrs David and Tarichan in Georgia († 693)