Eighteenth Amendment to the United States Constitution
The first clause, section one, says the law was to go into effect one year from its ratification. It was passed by Congress on December 18, 1917. The thirty-sixth state (required number for passage) to ratify the amendment did so 394 days later on January 16, 1919. The forty-seventh state to ratify the amendment was New Jersey on March 9, 1922. Rhode Island was the only state to reject ratification of the 18th Amendment.