Happy Australia DayPosted: 7 months ago by 2manyusernames Australia Day, celebrated annually on 26 January, is the official national day of Australia, commemorating the establishment of the first European settlement on the continent of Australia. The date is that of the foundation of a British penal colony in New South Wales, by Captain Arthur Phillip, the first Governor. Where are our Australian Plimates? Comments: 5 Score: [-] 391 [+].