Western Australia Day
Western Australia Day is held on June 3. Celebrated on the first Monday in June. This event in the first decade of the month June is annual. 
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Western Australia Day (WA Day) celebrates the day British captain Charles Fremantle claimed Western Australia for the British in 1829, setting up the Swan River Colony. While the day was originally called “Foundation Day” (prior to 2012), it has since been renamed to include all Western Australians, including aboriginal communities. The legislation emphasised that the new ‘State Day’ was to be inclusive of all people no matter how long they have called themselves Western Australians. WA Day takes place on the first Monday in June each year.
Similar holidays and events, festivals and interesting facts
National Burger Day in Australia on May 28
Mabo Day in Australia on June 3 (It commemorates Eddie Koiki Mabo [c. 29 June 1936–21 January 1992] a Torres Strait Islander whose campaign for Indigenous land rights led to a landmark decision of the High Court of Australia that, on 3 June 1992, overturned the legal fiction of terra nullius which had characterised Australian law with regards to land and title since the voyage of James Cook in 1770);
Queensland Day in Australia on June 6
National Banana Bread Day in Canberra, Australia on June 7
King’s Birthday in Australia on June 10 (celebrated on the second Monday in June. Except Western Australia and Queensland);
National Vegemite Day in Australia on June 16
World Scleroderma Day on June 29