Until the 1950s, the term Dominion of Canada was commonly used to identify the country. As Canada acquired political authority and autonomy from the United Kingdom, the federal government began using simply Canada on state documents. The transition away from the use of Dominion was formally reflected in 1982 with the passage of the Canada Act, which refers only to Canada. Later that year, the national holiday was renamed from Dominion Day to Canada Day. Section 4 of the 1867 BNA Act also declares that:
when did the dominion of canada become canada
1982