May 12 (Eastern Orthodox liturgics)
May 11 - Eastern Orthodox Church calendar - May 13
All fixed commemorations below celebrated on May 25 by Orthodox Churches on the Old Calendar.
For May 12th, Orthodox Churches on the Old Calendar commemorate the Saints listed on April 29.
Saints
- Saint Domitilla the martyr
- Saints Nereus and Achilleus the martyrs
- Saint Dracontius, Bishop of Nicaea
- Saint Epiphanius, Bishop of Salamis and Metropolitan of Cyprus
- Saint Calliope, nun, sister of St. Epiphanius of Cyprus.
- Saint Sabinus, Archbishop of Cyprus
- Saint Polybius, Bishop of Cyprus, Wonderworker
- Saint Theophanes, Archbishop of Cyprus
- Patriarch Germanus I of Constantinople
- Venerable Theodore of Kythera, ascetic
Pre-Schism Western saints
- Saint Philip of Agira the Hieromartyr
- Martyr Pancratius of Rome
- Martyr Dionysius, uncle of St. Pancratius
- Saint Díoma, teacher of St Declan of Ardmore, patron-saint of Kildimo in Co. Limerick in Ireland
- Saint Modoald, Archbishop of Trier, related by blood and united by friendship with most of the saints of the Merovingian period
- Saint Rictrudis, Abbess of Marchiennes Abbey in Flanders
- Saint Æthelhard, Archbishop of Canterbury
Post-Schism Orthodox saints
- Saint Euthemius, Patriarch of Jerusalem )
- Saint Nikitas the Sinaite
- New Martyr John of Serres
- Saint Theophanes, Bishop of Solea, Cyprus, later a hermit in the Troodos Mountains; the Outpourer of Myrrh
- Monk Dorotheus,
- Venerable Dionysius of Radonezh, Archimandrite of the Troitse-Sergiyeva Lavra
- New Martyr John of Wallachia, at Constantinople
- Saint Anthony of Radonezh, Archimandrite of Troitse-Sergiyeva Lavra
- Repose of Saint Nectarius (Tikhonov) of Optina
- Holy Elders of the Sofronievo-Molchensk Hermitage :
New martyrs and confessors
- New Martyr Abbess Athanasia, of the Smolensk Hodigitria Convent near Moscow
- New Hieromartyr Peter Popov, priest of Yaroslavl-Rostov
- Martyr Evdokia Martishkina
Other commemorations
- Consecration of the Cathedral of the Theotokos at Kiev
- Glorification of Hieromartyr Patriarch Hermogenes of Moscow
- Discovery of the holy relics of Saint Irene of Lesvos the Virgin-martyr
- Second Uncovering of the relics of Righteous Simeon of Verkhoturye