Hierarch
St. Isaiah the Bishop and Wonderworker of Rostov († 1090)
In Russian: Свт. Исаии, еп. Ростовского, чудотворца (1090)
In Church Slavonic: Ст҃а́гѡ и҆са́їи, є҆пі́скопа росто́вскагѡ, чꙋдотво́рца (1090)
Feast days
2026
Old calendar
- (15 May on the Old calendar), repose
New calendar
- , repose
2027
Old calendar
- (15 May on the Old calendar), repose
New calendar
- , repose
Also commemorated on 28 May 2026
- Venerable Pachomius the Great, Founder of Cœnobitic Monasticism († c. 348)
- Blessed Crown Prince Demetrius of Uglich and Moscow († 1591)
- Venerable Isaiah the Wonderworker of the Kiev Near Caves († 1115)
- Venerable Pachomius the Abbot of Nerekhta († 1384)
- Venerable Euphrosynus the Abbot and Wonderworker of Pskov († 1481) and his disciple Serapion († 1480)
- St. Achilles the Bishop of Larissa († c. 330)