thumb|The [[Eastern Orthodox Church|Eastern Orthodox cross]]
June 27 - Eastern Orthodox Church calendar - June 29
All fixed commemorations below celebrated on July 11 by Orthodox Churches on the Old Calendar.
For June 28th, Orthodox Churches on the Old Calendar commemorate the Saints listed on June 15.
Saints
- Martyrs Plutarch, Serenus, Heraclides, Heron, Rhaïs, Potamiœna and her mother Marcella, at Alexandria, under Septimius Severus (203)
- Hieromartyr Donagus, Bishop of Libya, by fire.
- Martyr Macedonius.
- The holy Two Children, who were crucified.
- The holy Three Martyrs of Galatia, by the sword.
- The holy 70 Martyrs of Scythopolis, by the sword.
- Venerable Magnus, who reposed while praying to the Lord.
- Venerable Moses the Anchorite.
- Saint Vulkian, monk. <small>(see also: March 25 )</small>
- Saint Paul the Physician, of Corinth (7th century)
- Saint Sergius the Magistrate, of Paphlagonia, founder of the Nikitiatus Monastery in Nicomedia (866)
Pre-Schism Western saints
- Saint Irenaeus of Lyon, a Greek cleric noted for expanding Christian communities in France, combatting heresy and defining Orthodoxy (202)