Commonwealth Day, formerly Empire Day, is the annual celebration of the Commonwealth of Nations, often held on the second Monday in March. It is marked by an Anglican service in Westminster Abbey, normally attended by Queen Elizabeth II as Head of the Commonwealth along with the Commonwealth Secretary-General and Commonwealth High Commissioners in London. The Queen delivers an address to the Commonwealth, which is broadcast throughout the world.Commonwealth Day is a public holiday in some parts of the Commonwealth, but not presently in Britain.