When the World War 1 begin and end?

World War 1 kicked off with the Austrian and Hungarian poeples invading the Republic of Serbia On 28 July 1914, the trigger for this invasion is widely acknowledged to be due to the assassination on 28 June 1914 of Archduke Franz Ferdinand of Austria, the heir to the throne of Austria-Hungary.

AnswerIt ended when the Germans agreed in Nov 1918 to sign an agreement to end the war (Armistice Day )( Now memorialized and called Memorial Day). The agreement was signed in Paris, France a few months later.

Correction Armistice Day and Memorial Day

It is now celebrated as Veterans Day. Memorial Day was known as Decoration Day