Australia Day (Foundation Day, Invasion Day, Survival Day, Anniversary Day) is the official national day of Australia. Celebrated annually on 26 January, it marks the anniversary of the 1788 arrival of the First Fleet of British ships at Port Jackson, New South Wales and the raising of the Flag of Great Britain at Sydney Cove by Governor Arthur Phillip. In 1838, 50 years after the First Fleet arrived, Foundation Day was declared Australia’s first public holiday in New South Wales. By 1935, January 26 was known as Australia Day in all states except New South Wales, where it was still called Anniversary Day.
Know as about Australian Indigenous languages are spoken by less than 1% of the total population. The most common languages other than English are: Mandarin, Arabic, Cantonese, Vietnamese, Italian and Greek. source by wikipedia.org