Portal:Australia/Anniversaries/May/May 30

• 1911 – The Supreme Court of the Northern Territory is established.
• 1923 – Australia, New Zealand and the United Kingdom sign an agreement to share the administration of former German colony Nauru.
• 1925 – Millicent Preston-Stanley becomes the first woman member of the New South Wales Legislative Assembly.
• 1928 – Pro Hart born in Broken Hill, New South Wales.
• 1988 – Expo '88 begins in Brisbane, 18 million visits are made in the six months it is open.
• 1989 – Ananda Marga member Tim Anderson is arrested on charges related to the 1978 Hilton bombing.
• 1991 – A television report reveals that Bob Hawke made a secret agreement to hand over the ALP leadership to Paul Keating in 1988.