The document discusses the Commonwealth, which consists of 54 nations across Africa, Asia, the Americas, Europe and the Pacific that were formerly part of the British Empire. The Commonwealth has over 2.4 billion people and its head is Queen Elizabeth II. Commonwealth Day is an annual celebration held on the second Monday in March where people across Commonwealth nations celebrate its diversity and shared values through events, gatherings and activities. This year's theme encourages connecting, innovating and transforming to support the shared environment.