Commonwealth Day is the annual celebration of the Commonwealth Nations, held on the second Monday in March. 

 

The event traces its origins to Empire Day, an event initially conceived to celebrate the British Empire. It was originally observed on Queen Victoria's birthday (24 May) or the last weekday before it. In the latter half of the 20th century, the celebration's focus shifted towards emphasising the modern Commonwealth of Nations, and the event was renamed Commonwealth Day in 1958; its date was moved to the second Monday in March in 1977.

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Commonwealth Day is typically marked by a Commonwealth Day message made by the Head of the Commonwealth, which is themed after an issue of importance to the Commonwealth that can have an impact on the people.  The Commonwealth Secretary Genery will also issue a statement on the day. Inter-denominational observances are also held in cities across the Commonwealth, including one led by the Head of the Commonwealth at Wesminster Abbey in London and attended by the Commonwealth Secretary-General.

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In Singapore, Commonwealth Day celebration is usually held at Eden Hall, the official residence of the British High Commissioner to the Republic of Singapore.