Canada Day, formerly known as Dominion Day,is the national day of Canada.It is a federal statutory holiday, it celebrates the anniversary of Canadian Confederaton which occurred on July 1, 1867, with the passing of the British North America Act of 1867 when the three separate colonies of the United Canadas, Nova Scotia and New Brunswick were united into a single dominion within the British Empire called Canada.
Originally called Dominion Day the holiday was renamed in 1982, the same year that the Canadian Constitution was patriated by the Canada Act, 1982.