When World War 1 finshed?

It ended when the Germans agreed in Nov 1918 to sign an agreement to end the war, and the Treaty of Versailles was signed on June 28, 1919. The day on which fighting ended was November 11, 1918. This was memorialized as Armistice Day and later renamed Veterans Day in the US.
It didnt end in 1 specific place. The last country to join the central powers, Bulgaria, was the first to surrender. The war ended on the Western Front, with an Armistice, at the 11th hour of the 11th day of the 11th month. The Germans signed the surrender in a railway carriage in the Forest of Compegnie, the same place Hitler accepted the French surrender in 1940.