Australia Day

noun
Aus·​tra·​lia Day | \ ȯ-ˈstrāl-yə- How to pronounce Australia Day (audio) , ä-, ə-\

Definition of Australia Day

: a national holiday in Australia commemorating the landing of the British at Sydney Cove in 1788 and observed on the Monday of or next following Jan. 26

First Known Use of Australia Day

1907, in the meaning defined above

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The first known use of Australia Day was in 1907

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