Commonwealth Day is celebrated every year by the 56 Commonwealth member countries on the second Monday in March. This year it falls on Monday, 9 March 2026.
The theme for Commonwealth Day 2026 is 'Unlocking opportunities together for a prosperous Commonwealth.'
Further information about Commonwealth Day is available on the Commonwealth website.
In accordance with Australian flag protocol, all Australian Government departments and associated portfolio agencies should fly or display the Australian National Flag all day on Monday, 9 March 2026.
State, territory and local government agencies as well as non-government organisations are also welcome to participate.
The financial and staffing implications arising from public holiday flag marshal duties are the responsibility of each organisation.
Further information on the Australian National Flag including flag protocol is available on the Department's website.
Your assistance is appreciated.
Commonwealth Flag Officer