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Events on Wednesday 8 December 1965 1
1965Second Vatican Council concludesSweeping reforms reshape the Catholic ChurchThe Second Vatican Council, convened by Pope John XXIII in 1962, concluded on 8 December 1965 under Pope Paul VI. Its decrees modernized Catholic liturgy, encouraged use of vernacular languages in the Mass, and opened dialogue with other faiths. It is regarded as the most significant event in Catholic Church history in the 20th century.