April 13 (Eastern Orthodox liturgics)
April 12 - Eastern Orthodox liturgical calendar - April 14
All fixed commemorations below are observed on April 26 by Eastern Orthodox Churches on the Old Calendar.
For April 13, Orthodox Churches on the Old Calendar commemorate the Saints listed on March 31.
Saints
- Saints Theodosia the Princess, and the Eunuch Gerontios
- Martyrs Dadas, Quinctillian and Maximus, the Lectors
- Martyr Crescens of Myra in Lycia
- Hieromartyr Artemon, priest of Laodicea in Syria
- Martyrs Eleutherius of Persia, and Zoilus, by beheading
- Martyr Theodosius, by the sword.
- Martyr Thomais of Alexandria
- Saint Martyrius, Patriarch of Jerusalem Saint Martin the Confessor, Pope of Rome
- Two Confessor Bishops, who were exiled to the Crimean peninsula together with St. Martin the Confessor, Pope of Rome
- Venerable martyr Christophoros, of the Great Lavra of St. Sabbas the Sanctified.
Pre-Schism Western saints
- Saint Ursus, Bishop of Ravenna and Confessor
- Saint Martius, Abbot, of Clermont in Gaul
- Saint Hermenegild, son of the Visigothic King of Spain, Leovigild
- Saint Guinoch of Buchan, a Bishop in Scotland
Post-Schism Orthodox saints
- Saint Arsenios of Elassonna, Archbishop of Elassona
- Venerable Herman, Archimandrite, of Svyatogorsk Monastery
- Saint Anastasia, nun and foundress of the Holy Protection Convent in Kiev
New martyrs and confessors
- New Hieromartyr Stephen, Bishop of Izhevsk
- Virgin-martyr Martha Testova
Other commemorations
- Repose of Archimandrite Herman of Svyatogorsk
- Translation of the relics of the Holy New Martyr George of Cyprus
- Repose of Elder Cosmas of Pantokratoros monastery, Mt. Athos