Commonwealth Day is the annual celebration of the Commonwealth of Nations held on the second Monday in March, and marked by a multi-faith service in Westminster Abbey, normally attended by Queen Elizabeth II as Head of the Commonwealth, with the Commonwealth Secretary-General and Commonwealth High Commissioners in London. The Queen delivers an address to the Commonwealth, broadcast throughout the world.
While it has a certain official status, Commonwealth Day is not a public holiday in most Commonwealth countries, and there is little public awareness of it.
In Canada, the only official recognition is a federal government stipulation that the Royal Union Flag be flown alongside Canada’s flag at government installations nationwide, “where physical arrangements allow…. Physical arrangements means the existence of at least two flag poles”. The 1964 parliamentary resolutions creating the Maple Leaf flag also retained the Union Flag as an official symbol of Canada’s membership in the Commonwealth, and allegiance to the Crown.