Australia's calendar of public holiday festivals begins with New Year's Day. This is also the day upon which the Australian Federation officially came into being, however the national day, Australia Day, is celebrated on 26 January, the anniversary of British colonisation. Anzac Day, 25 April is another day strongly associated with Australian nationhood, however it more particularly commemorates Australians who fought in wars and is named to honour the soldiers of the Australian and New Zealand Army Corps who landed at Gallipoli, on that same day in 1915, during World War I.