June 12 in Eastern Orthodox liturgical calendars is a feast day and a day of commemoration of saints and martyrs. Although some Orthodox churches use the Revised Julian Calendar and others use the traditional Julian calendar, the fixed commemorations for their respective June 12 are broadly the same, no matter which calendar is used.
Virgin-martyr Antonina, of Nicaea in Bithynia (c. 286-305) (see also: March 1)
Saints Basilides, Cyrinus, Nabor and Nazarius, and those with them, soldiers, at Rome (304)
Saint Amphianus (Amphion, Alerion, Amphitrion), Bishop and Confessor, in Cilicia (c. 310)
Saint Triphyllius, Bishop of Leucosia (Nicosia), in Cyprus (370)
Saint Zenon, Bishop of Kyrenia in Cyprus.
Saint Olympius, Bishop and Confessor, in Thrace (4th century)
Saint Timothy the Hermit, of Egypt (4th century)
Saints John, Andrew, Heraclemon, and Theophilus, hermits of Egypt (4th century) (see also: December 2)
Venerable Onuphrius the Great (4th century)
Saint John the Soldier, of Egypt (6th-7th century)
Venerable Peter of Mount Athos (734)
Venerable Julian of Dagaz (Dogazou), of the Dagouta Church in Constantinople.
Saint John (Tornicus) of Mt. Athos and Georgia (998)
Virgin-martyr Cunera of Rhenen, Netherlands (451)
Saint Ternan, an early missionary bishop among the Picts in Scotland (5th century)
Saint Leo III, Pope of Rome, who refused to add the filioque to the Nicene Creed (816)
Saint Odulphus (Odulph), Confessor and Priest (c. 855)