During which years did John Diefenbaker serve as Prime Minister?

John Diefenbaker served as Prime Minister of Canada from 1957 to 1963. During his time in office, he was known for significant developments including the introduction of the Canadian Bill of Rights in 1960 and his foreign policy stance, particularly concerning the United States and the Cold War context. His leadership was marked by efforts to enhance Canadian sovereignty and various social policies aimed at improving the lives of Canadians. The years 1957 to 1963 encapsulate his tenure, during which he became the first Conservative Prime Minister following a long period of Liberal dominance in Canadian politics.