Fairclough completed her historic two-day tenure as Canada's first female Acting Prime Minister on February 20, 1958.
Ellen Fairclough's tenure as Acting Prime Minister of Canada continued through February 20, 1958, the second and final day of her brief but historic appointment. Prime Minister John Diefenbaker's absence from the country required a designated minister to assume responsibility for government affairs, and Fairclough — already established as a trusted and capable Cabinet minister — was chosen for the role.
Though her time as Acting Prime Minister lasted only two days, from February 19 to February 20, 1958, it represented a genuine watershed: the first time in Canadian history that a woman held, even temporarily, the office of head of government. The brevity of the appointment does not diminish its symbolic and historical significance; it was a tangible demonstration that a woman could be entrusted with the full executive authority of the Canadian government.
Fairclough's completion of this two-day tenure closed out a milestone period in her career, coming on the heels of her landmark 1957 Cabinet appointment. Together, these events firmly established her as the preeminent female political trailblazer of her era in Canada, decades before Kim Campbell would become the country's first (and to date only) female Prime Minister in 1993.
Historians and commemorative organizations, including the Diefenbaker Canada Centre, continue to cite this brief but pioneering tenure as a key marker in the timeline of Canadian women's political advancement.