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

The Queen delivers an address to the Commonwealth. The Queen starts the Queen Baton Relay on Commonwealth Day at Buckingham Palace.

It is an official holiday in Gibraltar, Turks and Caicos Islands, Tuvalu.

In Belize, it is a national holiday on 24 May. It commemorates Queen Victoria's birthday.

It is a public holiday in the Northern Mariana Islands, celebrated on January 8th.