March 5 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 March 5 are broadly the same, no matter which calendar is used.
Martyr Conon of Isauria (1st century)
Martyr Nestor, father of Martyr Conon of Isauria.
Martyr Onisius (Onesimus) of Isauria, by beheading (1st century)
Saint Theophilus, Bishop of Caesarea in Palestine (200)
Martyr Conon the Gardener, of Pamphylia (251)
Martyrs Archelaus, Kyrillos, Photios, Virgin-martyr Irais (Rhais) of Antinoë, and 152 Martyrs in Egypt (ca. 308)
Venerable Conon of Cyprus (4th century)
Martyr Eulampius of Palestine, by the sword.
Venerable Mark the Ascetic of Egypt (Mark the Athenian, Mark the Faster) (5th century)
Saint Hesychius the Faster, of Bithynia (790) (see also: March 6)
Saint Oliva of Brescia, martyred in Brescia in the north of Italy, under the Emperor Hadrian (138)
Saint Eusebius, born in Cremona in Italy, he became an abbot in Bethlehem and took part in the struggle against Origenism.
Saint Eusebius and Companions, a group of ten martyrs who suffered in North Africa.
Saint Piran (Pyran, Kerrian), monk of Perranporth (c. 480)
Saint Colman of Armagh, a disciple of St Patrick in Ireland (5th century)
Saint Kieran of Saighir (Ciaran, Sen-Chiaráin = the Elder Ciarán), Munster (c. 530)
Saint Carthage the Elder, the successor of St Kieran as Bishop of Ossory in Ireland (ca. 540)