Remembrance (Armistice) Day, commemorating the end of World War I in 1918

“At 11 am on 11 November 1918 the guns on the Western Front fell silent after more than four years of continuous warfare… The 11th hour of the 11th day of the 11th month attained a special significance in the post-war years. The moment when hostilities ceased on the Western Front became universally associated with the remembrance of those who had died in the war. This first modern world conflict had brought about the mobilisation of over 70 million people and left between 9 and 13 million dead, perhaps as many as one-third of them with no known grave. The allied nations chose this day and time for the commemoration of their war dead.”

Australian War Memorial