December 15 (Eastern Orthodox liturgics)
- Eastern Orthodox liturgical calendar - December 16
All fixed commemorations below celebrated on December 28 by Eastern Orthodox Churches on the Old Calendar.
For December 15th, Orthodox Churches on the Old Calendar commemorate the Saints listed on December 2.Saints
- Hieromartyr Eleutherius, Bishop of Illyria, and Martyrs Anthia , Coremonus the Eparch , and two executioners who suffered with them.
- Martyr Eleutherius of Byzantium
- Martyr Susanna the Deaconess, of Palestine
- Venerable Pardus the Hermit, of Palestine
- Saint Stephen the Confessor, Archbishop of Surozh in the Crimea
- Monk-martyr Bacchus of St. Sabbas Monastery, by beheading
- Venerable Paul of Mt. Latros
Pre-Schism Western saints
- Saint Valerian of Abbenza, Bishop of Abbenza in North Africa
- Martyrs Faustinus, Lucius, Candidus, Caelian, Mark, Januarius and Fortunatus, in North Africa.
- Saint Mesmin, first Abbot of Micy near Orleans in France
- Saint Aubertus, Bishop of Cambrai-Arras
- Saint Florentius, Abbot of Bangor Abbey in Ireland
- Saint Offa of Essex, King of Essex in England, he went to Rome and took up the monastic life
- Saint Urbicius
- Saint Adalbero, a monk at the monastery of Gorze in France, became Bishop of Verdun, but was transferred to Metz
Post-Schism Orthodox saints
- Saint Nectarius of Bitel
- Saint Tryphon of Pechenga or Kola, "Enlightener of the Lapps", and his martyred disciple Jonah
- New Hieromartyr Hilarion, Archbishop of Verey
- New Hieromartyrs Alexander Rozhdestvensky and Basil Vinogradov, Priests of Tver
- New Hieromartyr Victorinus Dobronravov, Priest
- New Hieromartyr Joseph, Metropolitan of St. Petersburg
- Virgin-martyr Victorina.
Other commemorations
- Commemoration of the ordination of St. John Chrysostom as the Patriarch of Constantinople.
- Synaxis of the Saints of the Crimea.
- Synaxis of the Saints of Kola .
- Glorification of Saint Peter, Metropolitan of Kiev
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