Australia added the seventh point to the Commonwealth Star in 1908.
The original star on the Australian flag had six points, one for each of the colonies that federated to form the Commonwealth of Australia in 1901. The design was altered when a seventh point was added to represent Papua, then an Australian territory, as well as other territories and any future states.
The change produced the seven-pointed star seen on Australia’s flag today. The current version was officially adopted in December 1908, although some references discuss the related proclamation and implementation dates slightly differently.
This seventh point should not be confused with the five stars of the Southern Cross. Those stars occupy the fly side of the flag and represent the Southern Hemisphere constellation, while the Commonwealth Star is the single large star near the Union Jack.