Anzac Day is a national day of remembrance in Australia, New Zealand and Tonga that broadly commemorates all Australians and New Zealanders "who served and died in all wars, conflicts, and peacekeeping operations" and "the contribution and suffering of all those who have served".

Observed on 25 April each year, Anzac Day was initially devised to honour the Australian and New Zealand Army Corps (ANZAC) members who served in the Gallipoli campaign, their first engagement in the First World War (1914–1918).