After the end of the Second World War, the Australian and British governments changed the name to Remembrance Day. Armistice Day was no longer an appropriate title for a day which would commemorate all war dead.
In Australia on the 75th anniversary of the armistice in 1993 Remembrance Day ceremonies again became the focus of national attention. The remains of an unknown Australian soldier, exhumed from a First World War military cemetery in France, were ceremonially entombed in the Memorial's Hall of Memory. Remembrance Day ceremonies were conducted simultaneously in towns and cities all over the country, culminating at the moment of burial at 11 am and coinciding with the traditional two minutes' silence. This ceremony, which touched a chord across the Australian nation, re-established Remembrance Day as a significant day of commemoration.
Four years later, in 1997, Governor-General Sir William Deane issued a proclamation formally declaring 11 November to be Remembrance Day, urging all Australians to observe one minute's silence at 11 am on 11 November each year to remember those who died or suffered for Australia's cause in all wars and armed conflicts.
Extract from the Australian War Memorial website.