Armistice Day is commemorated every year on November 11 to mark the armistice signed between the Allies of World War I and Germany at Compiègne, France, for the cessation of hostilities on the Western Front of World War I, which took effect at eleven o'clock in the morning—the "eleventh hour of the eleventh day of the eleventh month" of 1918. The date was declared a national holiday in many allied nations, and coincides with Remembrance Day and Veterans Day, public holidays.

(Source: wikipedia.org)