17 February 1933
On this day in 1933 The Blaine Act was passed by the US Senate starting the process by which the 21st Amendment was ratified thereby repealing the 18th Amendment and bringing an end to Prohibition in the United States of America
Wisconsin Senator John J Blaine sponsored the Act which bore his name the passing of which set in motion the events making it possible to repeal the 18th Amendment to the Constitution of the United States of America thereby bringing an end to prohibition.
Prohibition had been in place in the United States since 1920 and forbade the sale, manufacture or transportation of alcohol but was widely regarded as a failure even by its supporters.
The 21st Amendment did away with it by repealing the 18th Amendment. That process was completed on 5 December 1933.