^The notation Old Style or (OS) is sometimes used to indicate a date in the Julian Calendar (which is used by churches on the "Old Calendar"). The notation New Style or (NS), indicates a date in the Revised Julian calendar (which is used by churches on the "New Calendar").
^A martyr in Rome. Still only a catechumen, this foster-sister of St Agnes was found by pagans praying at the tomb of the recently martyred Agnes and was stoned to death.
^A Greek, driven from the East by the Arians, he became second Bishop of Teano in central Italy in 346.
^"At Toledo, St. Ildefonsus, bishop, who, on account of his great purity of life, and his defense of the virginity of the Mother of God against the heretics who impugned it, received from her a brilliant white vestment, and being renowned for sanctity, was called to heaven."[16]
^Nephew of St Eugene of Toledo in Spain. He knew St Isidore of Seville and became a monk and Abbot of Agli on the Tagus near Toledo. He became Archbishop there in 657. He excelled as a writer, especially on the Mother of God.
^"Abbot Damascene (1835-1881). January 25. In the direct line of Paisius Velichkovsky's disciples, Cleopas, Theodore and Euthymius, the humble Abbot Damascene was placed as head of Valaam, that Athos of the North, at the insistence of such a luminary as Bishop Ignatius Brianchaninov. Abbot Damascene fortified the eremitic life by building isolated sketes with an austere typicon which bore fruit an hundred fold for generations of great ascetics. Thus, Abbot Damascene is rightly called a builder of saints. He is also called a saint, as he has been known to appear from the other world to console and protect those who keep his memory. It is interesting to note that though he was a simple, uneducated man, Abbot Damascene possessed a great sense of appreciation of the arts; he encouraged artists, musicians and students to visit Valaam and create by being inspired by Valaam's natural beauty. The painters Shishkm, Aivazovsky, and the composer Tchaikovsky were among them. The latter, having been snowed-in on Valaam, had an opportunity to hearken to inspiration and wrote his first symphony, in which he depicted the blizzard and the freeze and thaw of the watery element. He entitled this work "Winter Dreams"."[27]
^Great Synaxaristes: (in Greek)Οἱ Ἅγιοι Δύο Μάρτυρες. 23 Ιανουαρίου. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.
^ abThe Autonomous Orthodox Metropolia of Western Europe and the Americas (ROCOR). St. Hilarion Calendar of Saints for the year of our Lord 2004. St. Hilarion Press (Austin, TX). p. 9.
^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. 23–24.
The Autonomous Orthodox Metropolia of Western Europe and the Americas (ROCOR). St. Hilarion Calendar of Saints for the year of our Lord 2004. St. Hilarion Press (Austin, TX). p. 9.
January 23. 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. 23–24.
(in Greek) Συναξαριστής. 23 Ιανουαρίου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).
Russian Sources
(in Russian)5 февраля (23 января). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).