1920's in Australia By priscilla.mallios Jan 22, 1920 National Country Party of Australia Formed Mar 20, 1920 General Election held in NSW Apr 2, 1920 Edward, Prince of Wales comes to Australia Jun 1, 1920 Adelaide has its wettest June day on Jun 10, 1920 Perth has its highest daily rainfall until 1992 Jul 20, 1920 Arthur Boyd, artist Aug 10, 1920 The Princes Highway is officially opened Sep 1, 1920 Balmain Tigers win the New South Wales Rugby Football League season Sep 25, 1920 Richmond defeat Collingwood Sep 30, 1920 Russell Walter Fox, author and SA Supreme Court judge Nov 16, 1920 Qantas Formed Dec 3, 1920 The first successful flight from Melbourne to Perth is completed Dec 17, 1920 The authority to issue currency notes is transferred from Treasury on the Australian Notes Board