HM Queen Elizabeth II
Commonwealth Day is the annual celebration of the Commonwealth of Nations, marked by a multi-faith service in Westminster Abbey.
The service is normally attended by Queen Elizabeth II, the Head of the Commonwealth, the Commonwealth Secretary-General, and Commonwealth High Commissioners in London.
Every year, the Queen delivers a televised address to the Commonwealth member states.
Every four years, this day also marks the beginning of the Queen's Baton Relay , which ends just before the Commonwealth Games start.