Commemoration of the First Ecumenical Council (325)
In Russian: Память I Вселенского Собора (325)
In Church Slavonic: Ст҃ы́хъ ѻ҆ц҃є́въ а҃ вселе́нскагѡ собо́ра (325)
Feast days
2026
Old calendar
- (29 May on the Old calendar), commemoration
New calendar
- , commemoration
2027
Old calendar
- (29 May on the Old calendar), commemoration
New calendar
- , commemoration
Also commemorated on 11 June 2026
- Virginmartyr Theodosia of Constantinople († 730)
- Repose of the Blessed John of Ustiug the Fool-for-Christ († 1494)
- Finding of the Relics (2000) of the Venerable Job, in schema Joshua, of Anzer († 1720)
- New Hieromartyr Deacon John and Martyr Andrew († 1938)
- Holy New Hieroconfessor Luke, Archbishop of Simferopol († 1961)
- Virginmartyr Theodosia of Tyre († c.307)
- Иконы Божией Матери, именуемой «Споручница грешных»