January 1 (Eastern Orthodox liturgics)

• Feast of the Circumcision of Christ.[1][2][3][note 2][note 3]

• Martyr Theodotus, by the sword.[6][7]
• Martyr Basil of Ancyra (362)[8][note 4] (see also: January 2)
• Saint Gregory of Nazianzus the Elder, bishop and father of Saint Gregory the Theologian (374)[9][10]
• Saint Emilia, (mother of Sts. Macrina, Basil the Great, Naucratius, Peter of Sebaste, and Gregory of Nyssa) (375)[10][11][note 5]
• Saint Basil the Great, Archbishop of Caesarea in Cappadocia (379)[12][13][note 6][note 7]
• Saint Theodosius of Tryglia, abbot[7][10][14][note 8]

• Hieromartyr Concordius of Spoleto (c. 175)[15][note 9]
• Thirty soldier-martyrs in Rome, under Diocletian (c. 304)[15][note 10]
• Saint Telemachus (Almachius), hermit who came to Rome from the East and publicly protested against Pagan rites on New Year's Day, killed by gladiators in the Roman amphitheatre (391 or 404)[15][note 11]
• Saint Basil, Bishop of Aix en Provence (c. 475)[15]
• Saint Eugendus, fourth Abbot of Condat Abbey in the Jura Mountains (510)[7][10][15]
• Saint Fanchea of Killeany (Fanchea of Rossory), sister of St Enda of Aran (c. 520)[7][10][15][16][note 12]
• Saint Fulgentius of Ruspe, Bishop of Ruspe in North Africa (533)[7][10][note 13]
• Saint Justin of Chieti, bishop of Chieti, Italy (c. 540)[15][note 14]
• Saint Felix of Bourges, Bishop of Bourges (c. 580)[15]
• Saint Connat (Comnata, Comnatan), Abbess of Kildare Abbey in Ireland (c. 590)[15][17]
• Saint Maelrhys, a saint on Bardsey Island in Wales (6th century)[15]
• Saint Clarus, Abbot of St. Marcellus Monastery in Vienne, Gaul (c. 660)[10][15]
• Saint Cúan (Mochua, Moncan), Irish abbot, founder of many churches and monasteries in Ireland, lived to nearly 100 (752)[15][18]
• Saint Peter of Atroa, Abbot, opponent of iconoclasm (Peter the Standard-Bearer) (837)[19] (see also: January 3 - East)
• Saint William of Dijon (William of Volpiano), Italian monastic reformer and architect (1031)[15]

• Saint Peter Mogila, Metropolitan of Kiev and Galicia (1646) [20]
• New Martyr Peter of Tripolis in the Peloponnesus, at Temisi in Asia Minor (1776)[10][21]
• Saint Athanasius (Volkhovsky), Bishop of Mohyliv, Wonderworker of Poltava (1801)[22]

• 
  Circumcision of Christ. Menologion of Basil II.
• 
  St. Telemachus (from Foxe's Bok of Martyrs, 1563).
• 
  St. Basil the Great.
• 
  Fresco of St. Basil the Great, lower register of sanctuary in Church of the Theotokos Peribleptos in Ohrid (13th century).
• 
  St. William of Volpiano, statue above his tomb in Fécamp Abbey.
• 
  St. Peter Mogila, Metropolitan of Kiev and Galica (17th century).
• 
  St. Platon (Kulbush), Bishop of Tallinn (Reval), Estonia.
• 
  New Hieromartyr Alexander (Trapitsyn), Archbishop of Samara.

• January 1/14. Orthodox Calendar (PRAVOSLAVIE.RU).
• January 14 / January 1. HOLY TRINITY RUSSIAN ORTHODOX CHURCH (A parish of the Patriarchate of Moscow).
• January 1. OCA - The Lives of the Saints.
• January 1. Latin Saints of the Orthodox Patriarchate of Rome.
• The Roman Martyrology. Transl. by the Archbishop of Baltimore. Last Edition, According to the Copy Printed at Rome in 1914. Revised Edition, with the Imprimatur of His Eminence Cardinal Gibbons. Baltimore: John Murphy Company, 1916. pp. 1–3.
• Rev. Richard Stanton. A Menology of England and Wales, or, Brief Memorials of the Ancient British and English Saints Arranged According to the Calendar, Together with the Martyrs of the 16th and 17th Centuries. London: Burns & Oates, 1892. p. 1.

Greek Sources

• Great Synaxaristes: (in Greek) 1 ΙΑΝΟΥΑΡΙΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
• (in Greek) Συναξαριστής. 1 Ιανουαρίου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).

Russian Sources

• (in Russian) 14 января (1 января). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).
• (in Russian) 1 января (ст.ст.) 14 января 2013 (нов. ст.) Archived 2019-01-27 at the Wayback Machine. Русская Православная Церковь Отдел внешних церковных связей. (DECR).