December 13 (Eastern Orthodox liturgics)
- 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
- Venerable Ares, monk in the Egyptian desert.
- Venerable Arsenius the Ascetic of Mt. Latros
Pre-Schism Western saints
- Martyr Antiochus of Sulcis, under the Emperor Hadrian
- Virgin-martyr Lucy of Syracuse
- Saint Columba of Terryglass and Holy Island on Lough Derg, Ireland
- Saint Judoc, a 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
- Saint Edburga of Minster-in-Thanet, a disciple of St 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 St Ottilia
- Saint Wilfrid, a monk and Abbot of the Monastery of St Victor in Marseilles, France
Post-Schism Orthodox saints
- Venerable Arcadius of Novy Torg, Monk of Novotorzhok, disciple of St. Ephrem
- Saints Neophytos, Ignatius, Procopius and Neilos, founders of the Holy Monastery of Machaira, Cyprus
- Saint Mardarius, Recluse of the Kiev Caves
- Hieromartyr Gabriel, Serbian Patriarch
- Saint Dositheus, Metropolitan of Moldavia
- Venerable Nicodemus of Romania.
- Venerable Herman of Alaska, Wonderworker of Alaska.
- New Hieromartyr Alexander Yuzefovich, Priest, and Martyr John Menkov
- New Hieromartyr, Protopresbyter of St. 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
- 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
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