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Pope Clement VIII was born on February 24, 1536. He was the 231st pope of the Catholic Church, serving from 1592 to 1605. During his papacy, he played a significant role in the Counter-Reformation, issuing the bull "Cum ex Apostolatus Officio" which condemned the teachings of Michael Baius and the bull "Dominus ac Redemptor Noster" which reformed the calendar, introducing the Gregorian calendar.