December 13 (Eastern Orthodox liturgics)
December 12 - Eastern Orthodox liturgical calendar - December 14
All fixed commemorations below celebrated on December 26 by Eastern Orthodox Churches on the Old Calendar.
For December 13th, Orthodox Churches on the Old Calendar commemorate the Saints listed on November 30.
Saints
Martyrs Eustratius, Auxentius, Eugene, Mardarius, and Orestes, at Sebaste, also known as the Holy Five Martyrs of Sebaste- Venerable Ares, Monk in the Egyptian desert
- Saint Auberius, Bishop
- Venerable Arsenius the Ascetic of Mt. Latros
Pre-Schism Western saints
- Martyr Antiochus of Sulcis, under the Emperor Hadrian Virgin Martyr Lucia of Syracuse
- Saint Columba of Terryglass and Holy Island on Lough Derg, Ireland
- Saint Judoc of Ponthieu, Priest, brother of King Judicäel of Brittany, became a hermit in Villiers-Saint-Josse
- Saint Aubert, Bishop of Cambrai-Arras in France, founded monasteries including Saint Vaast in Arras
- Saint Odilia of Alsace, Gaul
- Saint Edburga of Minster-in-Thanet, a disciple of Saint Mildred, whom she probably succeeded as Abbess of Minster-in-Thanet in 716
- Saint Tassilo, Duke of Bavaria and a great monastic benefactor, became a monk at Jumièges Abbey, reposed at Lorsch Abbey
- Saints Einhildis and Roswinda, nuns at Hohenburg Abbey in Alsace in France with Saint Ottilia
- Saint Wilfrid, a monk and Abbot of the Monastery of St Victor in Marseilles, France
Post-Schism Orthodox saints
- Venerable Arcadius of Vyazma, Monk of Novotorsk, disciple of Saint Ephrem
- Saints Neophytos, Ignatios, Prokopios, and Neilos, founders of Machairas Monastery, Cyprus
- Saint Mardarius the Recluse of the Kiev Caves
- Saint Dositheus, Metropolitan of Moldavia, Romania
- Venerable Nicodemus of RomaniaVenerable Herman, Wonderworker of Alaska.
- Saint Innocent of Kherson
New martyrs and confessors
- New Hieromartyr Gabriel (Gavrilo) I Rajić, Archbishop of Peć and Serbian Patriarch
- New Hieromartyr Alexander Yuzefovich, Priest, and Martyr John Menkov
- New Hieromartyr Vladimir Lozina-Lozinsky, Protopresbyter of Saint Petersburg
- New Hieromartyrs Alexander Pospelov and Jacob Gusev, Priests
- New Hieromartyr Nicholas Amasiysky, Priest of Alma-Ata
- New Hieromartyrs Emilian Kireyev and Basil Pokrov, Priests
Other commemorations
- Sunday of the Holy Forefathers of Jesus Christ
- Commemoration of the miracle by the Holy Five Martyrs
- Repose of Schemamonk Panteleimon "the Resurrected" of Glinsk Hermitage
- Repose of Blessed Maximus of Ustiug
- Repose of Bishop Theodore, Wonderworker of Trolov Convent in Kiev
- Repose of Hieromonk Joel of Valaam
- Repose of Archimandrite Gerasim Iscu of Tismana Monastery, Romania