May 30 (Eastern Orthodox liturgics)
- Eastern Orthodox Church calendar - May 31
All fixed commemorations below celebrated on June 12 by Orthodox Churches on the Old Calendar.
For May 30th, Orthodox Churches on the Old Calendar commemorate the Saints listed on May 17.Saints
- Martyrs Aphrodisius, Agapius, Eusebios, Charalampos and Christina, in Nicomedia, by fire
- Hieromartyr Eutychius, disciple of St. John the Theologian
- Martyrs Romanos and Teletios, in Nicomedia, by the sword.
- Martyr Euplius.
- Martyr Natalios, by the sword.
- Venerable Martyr Barlaam, of Caesarea in Cappadocia
- Saint Cyprian of Antioch, reposed in peace.
- Saint Macrina the Elder, grandmother of St. Basil the Great
- Saint Emmelia of Caesarea, mother of Saint Basil the Great
- Venerable Isaac the Confessor, founder of the Dalmatian Monastery at Constantinople
Pre-Schism Western saints
- Martyrs Gabinus and Crispulus, at Torres in Sardinia, Protomartyrs of Sardinia
- Pope Saint Felix I, who was the first to condemn the heresy of Paul of Samosata
- Saint Venantius of Gaul, elder brother of St Honoratus of Lérins
- Saint Exuperantius, Bishop of Ravenna and Confessor
- Saint Madelgisilus, Irish saint, disciple of St Fursey
- Saint Anastasius of Pavia
- Saint Hubert, the "Apostle of the Ardennes", first Bishop of Liège
- Saint Gamo, monk and then Abbot of Brétigny near Noyon in France
- Saint Walstan, a farm labourer in Taverham and Costessey, remarkable for his charity
Post-Schism Orthodox saints
- Saint James, monk of Starotorzhok in Galich, Kostroma
- Venerables Isaiah and Nikanor of Arkhangel'sk
- Hieromartyr Basil, Priest
Other commemorations
- Consecration of the Church of St. Euphemia in Dexiokratiana, Constantinople.
- Repose of Abbot Ephraim of Sarov
- Repose of Hieromonk Benedict of Romania
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