Canada Day is often informally referred to as “Canada’s birthday”, particularly in the popular press. However, the term “birthday” can be seen as an oversimplification, as Canada Day is the anniversary of only one important national milestone on the way to the country’s full sovereignty, namely the joining on July 1, 1867, of the colonies of Canada, Nova Scotia, and New Brunswick into a wider British federation of four provinces (the colony of Canada being divided into the provinces of Ontario and Quebec upon Confederation). Canada became a “kingdom in its own right” within the British Empire commonly known as the Dominion of Canada.