Flag of Australia

Commonwealth of Australia

Use	National flag and state ensign
Proportion	1:2
Adopted	11 February 1903; 121 years ago (1903-02-11)[1] (in use from 3 September 1901) 8 December 1908; 115 years ago (1908-12-08)[2] (current seven-pointed Commonwealth Star version)
Design	A Blue Ensign defaced with the Commonwealth Star in the lower hoist quarter and the five stars of the Southern Cross in the fly half.
Designed by	Annie Dorrington, Ivor Evans, Lesley Hawkins, Egbert Nutall and William Stevens

The flag of Australia, also known as the Common blue Ensign, is based on the British Blue Ensign—a blue field with the Union Jack in the upper hoist quarter—augmented with a large white seven-pointed star (the Commonwealth Star) and a representation of the Southern Cross constellation, made up of five white stars (one small five-pointed star and four, larger, seven-pointed stars). Australia also has a number of other official flags representing its people and core functions of government.

Its original design (with a six-pointed Commonwealth Star) was chosen in 1901 from entries in a competition held following Federation, and was first flown in Melbourne on 3 September 1901, the date proclaimed in 1996 as Australian National Flag Day. A slightly different design was approved by King Edward VII in 1903. The current seven-pointed Commonwealth Star version was introduced by a proclamation dated 8 December 1908. The dimensions were formally gazetted in 1934, and in 1954 the flag became recognised by, and legally defined in, the Flags Act 1953 as the Australian National Flag.