Catherine of Alexandria
Great Martyr
Commemorated November 24 · November 25
The holy and glorious Great-martyr Catherine of Alexandria was the daughter of the governor of Alexandrian Egypt, Constas, during the reign of the emperor Maximinus (305-313), and she suffered for her Lord in the year 305. Some believe the saint's original feast day to be November 24 and this date is still celebrated by the Slavic churches; however historic documents at the Monastery of Sinai support November 25th as the original feast day, and the Byzantine churches commemorate the saint on this day, November 25 , together with the Leavetaking of the Presentation of the Theotokos .
Source: OrthodoxWiki