Jan. 19 - Eastern Orthodox Church calendar - Jan. 21.
All fixed commemorations below are observed on February 2 by Orthodox Churches on the Old Calendar.
For January 20th, Orthodox Churches on the Old Calendar commemorate the Saints listed on January 7.
Martyrs Inna, Pinna, and Rimma (1st-2nd century), disciples of the Apostle Andrew in Scythia
Martyr Eusebius (298)
Venerable Euthymius the Great (473)
Martyrs Bassus, Eusebius, Eutychius, and Basilides, at Nicomedia (303)
Martyrs Thyrsus and Agnes (5th century)
Saint Leo the Great (Leo Marcellus), Confessor and Emperor of the Eastern Roman Empire (474)
Saint Peter the Customs Inspector of Constantinople (Peter of Constantinople) (c. 527-565)
Martyr Anna at Rome
Saint Fabian, Pope of Rome (250)
Saint Sebastian, one of the most renowned of all the martyrs of Rome (c. 288)
Saint Molagga (Laicin), disciple of St David in Wales, founded a monastery in Fulachmhin (Fermoy), Ireland (655)
Saint Féchín of Fore (665)
Saint Maurus, monk and Abbot of Classe in Ravenna (Basilica of Sant'Apollinare in Classe), and finally Bishop of Cesena (946).
Saint Euthymius, Bishop of Pereyaslav (1149)
Venerable Laurence the Recluse (13th-14th century) of the Kiev Caves
Venerable Euthymius the Silent, Schemamonk (14th century), of the Kiev Caves
Saint Neophytus of Vatopedi monastery, Mt. Athos (14th century)(see also: January 21)
Saint Euthymius, Patriarch of Turnovo (1402)
Saint Euthymius of Syanzhema (Vologda) (1470)
Venerable Euthymius of Arkhangelsk (1523)
New Martyr Zachariah of Patrai in Morea (1782)
Venerable Theodore Kuzmich of Tomsk (1864)
New Martyrs and Confessors
New Hieromartyr Ioan Pettai, Estonian Martyr Presbyter.
New Hieromartyr Paul Dobromyslov, Archpriest, of Ryazan (1940)
Venerable Ekvtime (Kereselidze) the Confessor, of Georgia (1944) (see also: February 2 - Greek)
Repose of Elder Gerasim, founder of Ascension Monastery, Irkutsk (1676)
January 20 (Eastern Orthodox liturgics) Wikipedia (Text) CC BY-SA