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").
"IN Thebais, St. Anthony, abbot and spiritual guide of many monks. He was most celebrated for his life and miracles, of which St. Athanasius has written a detailed account. His sacred body was found by divine revelation, during the reign of the emperor Justinian, and brought to Alexandria, where it was buried in the church of St. John the Baptist."[4]
"ST. MlLDGYTH was the youngest of the three saintly daughters of Merewald and St Ermenburga. When her mother returned to Kent, it is probable that Mildgyth accompanied her, as she must then have been of a tender age, and that she remained with her at Minster for some time. Like her sisters, St. Milburga and St. Mildred, she was favoured with a vocation to the religious life, and the place chosen for her retreat was some monastery in the kingdom of Northumbria, the name of which is not known. The ancient record merely says: St. Milgith lies in Northumbria, where her miraculous powers were often exhibited, and still are."[12]
Venerable Anthony Cantacuzène was the son of Maria Kantakouzene (the daughter of Emperor John VI Kantakouzenos), who married Nikephoros II Orsini the Despot of Epirus.
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.17-18.
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.8.
January 17. 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.17–18.
(in Greek) Συναξαριστής. 17 Ιανουαρίου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).
Russian Sources
(in Russian)30 января (17 января). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).