What is Anzac Day Holiday ?

Anzac Day /'ænzæk/ is a national day of remembrance in Australia and New Zealand 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." Originally 25 April every year was to honour the members of the Australian and New Zealand Army Corps (ANZAC) who fought at Gallipoli in the Ottoman Empire during World War I. Anzac Day is also observed in the Cook Islands, Niue, Pitcairn Islands, and Tonga. It is no longer observed as a national holiday in Papua New Guinea or Samoa.