Remembrance Day is a memorial day observed in Commonwealth member states since the end of the First World War to honour armed forces members who have died in the line of duty. The day is also marked by war remembrances in several other non-Commonwealth countries. In most countries, Remembrance Day is observed on 11 November to recall the end of First World War hostilities. Hostilities ended "at the 11th hour of the 11th day of the 11th month" of 1918, in accordance with the armistice signed by representatives of Germany and the Entente between 5:12 and 5:20 that morning. The First World War formally ended with the signing of the Treaty of Versailles on 28 June 1919.

A remembrance poppy is an artificial flower worn in some countries to commemorate their military personnel who died in war. Remembrance poppies are produced by veterans' associations, who exchange the poppies for charitable donations used to give financial, social and emotional support to members and veterans of the armed forces.