Remembrance Day -- also known as Poppy Day, Armistice Day (the event it commemorates) or Veterans Day -- is a day to commemorate the sacrifices of members of the armed forces and of civilians in times of war, specifically since the First World War. It is observed on 11 November to recall the end of World War I on that date in 1918. The day was specifically dedicated by King George V, on 7 November 1919, to the observance of members of the armed forces who were killed during war; this was possibly done upon the suggestion of Edward George Honey to Wellesley Tudor Pole, who established two ceremonial periods of remembrance based on events in 1917.
Common British, Canadian, South African, and ANZAC traditions include two minutes of silence at the eleventh hour of the eleventh day of the eleventh month (11:00 am, 11 November), as that marks the time (in the United Kingdom) when armistice became effective.
In Australia Remembrance Day is always observed on 11 November, although the day is not a public holiday. Services are held at 11am at war memorials in suburbs and towns across the country, at which "Last Post" is sounded by a bugler and a one-minute silence is observed.