Originally called Armistice Day, this day commemorated the end of the hostilities for the Great War (World War I), the signing of the armistice, which occurred on 11 November 1918—the 11th hour of the 11th day of the 11th month. Armistice Day was observed by the Allies as a way of remembering those who died, especially soldiers with 'no known grave'.

On the first anniversary of the armistice, in 1919, one minute's silence was instituted as part of the main commemorative ceremony. In London, in 1920, the commemoration was given added significance with the return of the remains of an unknown soldier from the battlefields of the Western Front.

The Flanders poppy became accepted throughout the allied nations as the flower of remembrance to be worn on Armistice Day. The red poppies were among the first plants that sprouted from the devastation of the battlefields of northern France and Belgium. 'Soldiers' folklore had it that the poppies were vivid red from having been nurtured in ground drenched with the blood of their comrades'.

After the end of World War II in 1945, the Australian and British governments changed the name to Remembrance Day as an appropriate title for a day which would commemorate all war dead