When did the Australian colonies form a confederation?
In January 1, 1901 the colonies of Australia became the Commonwealth of Australia. On this day, the Constitution of Australia became effective.
In Canada, the "Confederation" refers to the entire nation, similar to the way that the "Union" refers to the entire nation in the United States. The colonies of confederation refers to the original British colonies/provinces that merged to form Canada (Upper/Lower Canada, now Quebec and Ontario), New Brunswick, Nova Scotia.
Three British colonies, Nova Scotia, New Brunswick, and the pre-Confederation Province of Canada, united on July 1, 1867, to form Canada. Immediately upon Confederation, the Province of Canada was divided into the Province of Québec and the Province of Ontario. Canada was formed by the British North America Act, thereby becoming the first country to be created by legislation.