Dominion Day is the name of the holiday that commemorated the Dominion of Canada on 1 July 1867. The holiday was renamed Canada Day on 27 October 1982.
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Dominion Day
From the 1960s into the 1980s, Dominion Day was the date the Miss Dominion of Canada beauty pageant, held at Niagara Falls, Ontario, to select the Canadian representative for the major international beauty pageants (Miss Universe, Miss World, Miss International, and Queen of the Pacific).