Martyrs Anatolius and Protoleon,[12][13] soldiers converted by witnessing the martyrdom of St. George; and martyrs Glycerius[14] and Athanasius the Magician,[15] at Nicomedia (303)[2]
^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").
^"The great Martyr, St. George, suffered with admirable constancy in the persecution of Diocletian. When peace was granted to the Church, on the accession of Constantine, St. George began to be greatly venerated by the Christians of the East; churches were soon erected in his honour, and by common consent he received the title of the Great. The devotion quickly spread to the West, and in an especial manner among our ancestors, who invoked him as the tutelar Saint of their wars, and ascribed many great victories to his intercession. Pope Benedict XIV declared St. George Protector of England, and his festival is kept as a double of the first class throughout the country."[8]
^"One of the most celebrated martyrs, St George was the patron, along with St Michael and St Nicholas, of the Kozak Host and of the armies of Kyivan Rus’...The Ukrainian agricultural years begins with blessings of the fields on this day – and ends on the feast of the consecration of the Cathedral of St George in Kyiv built by St Yaroslav-Yurij the Wise. In Georgia, which is named after St George, there are 365 shrines to him so he is honoured liturgically there each day of the year."[10]
^"At Valence, in France, the holy martyrs Felix, priest, Fortunatus and Achilleus, deacons, who were sent there to preach the word of God by blessed Irenseus, bishop of Lyons, and converted the greater portion of that city to the faith of Christ. These martyrs were cast into prison by the commander Cornelius, were a long time scourged, had their legs crushed, were bound to wheels in motion, and stifled with smoke whilst stretched on the rack, and finally died by the sword.[7]
^Born in Cologne in Germany, he became Bishop of Toul in France in 963. He rebuilt the Cathedral and established monasteries with both Greek and Irish monks for the furtherance of the Orthodox Faith.
^Born in Bohemia, he became Bishop of Prague (983). Disheartened, he went to Rome and became a monk. Twice he returned to his former mission and twice he had to abandon it. On each occasion he preached in Poland, Prussia and Hungary. He was martyred by the Prussians near Danzig.
^"In Prussia, the birthday of St. Adalbert, bishop of Prague, and martyr, who preached the Gospel to the Poles and Hungarians."[7]
^ abcdeThe 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. 114.
^ abcdefApril 23. Latin Saints of the Orthodox Patriarchate of Rome.
^Rev. Sabine Baring-Gould (M.A.). "SS. Felix, Fortunatus, and Achilles, MM. (A.D. 212.)." In: The Lives of the Saints. Volume the Fourth: April. London: John C. Nimmo, 1897. p. 300.
^Rev. Sabine Baring-Gould (M.A.). "S. Adalbert, B. of Prag, M. (A.D. 997.)." In: The Lives of the Saints. Volume the Fourth: April. London: John C. Nimmo, 1897. pp. 311-312.
^ abcdMay 6 / April 23. Holy Trinity Russian Orthodox Church (A parish of the Patriarchate of Moscow).
^ abThe Autonomous Orthodox Metropolia of Western Europe and the Americas. St. Hilarion Calendar of Saints for the year of our Lord 2004. St. Hilarion Press (Austin, TX). p. 31.
The Autonomous Orthodox Metropolia of Western Europe and the Americas. St. Hilarion Calendar of Saints for the year of our Lord 2004. St. Hilarion Press (Austin, TX). p. 31.
April 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. p. 114.
(in Greek) Συναξαριστής. 23 Απριλίου. ecclesia.gr. (H Εκκλησια Τησ Ελλαδοσ).
Russian Sources
(in Russian)6 мая (23 апреля). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).