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").
"AT Patras, in Achaia, the birthday of the apostle St. Andrew, who preached the gospel of Christ in Thrace and Scythia. Being apprehended by the proconsul Aegaeas, he was shut up in prison, severely scourged, and finally, being suspended on a cross, he lived two days on it, teaching the people. Having besought our Lord not to permit that he should be taken down from the cross, he was surrounded with a great brightness from heaven, and when the light disappeared he breathed his last."[6]
St Andrew’s Cathedral in Kiev (Rastrelli) keeps the cross which he is said to have planted on the Kievan hills as he blessed them and foretold that the city would have many churches.[7]
"At Rome, St. Constantius, confessor, who strongly opposed the Pelagians, and by enduring many injuries from them, gained a place among holy confessors."[6]
A monk from Wales who went to Brittany and became Bishop of Tréguier. Three places in the Lleyn peninsula in Gwynedd recall him and his relics are still honoured in Tréguier.
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. p.369.
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.89.
November 30. 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. p.369.
(in Greek) Συναξαριστής. 30 Νοεμβρίου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).
Russian Sources
(in Russian)13 декабря (30 ноября). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).