1886 – Rallies are held throughout the United States demanding the eight-hour work day, culminating in the Haymarket affair in Chicago, in commemoration of which May 1 is celebrated as International Workers' Day in many countries.
1915 – The departs from New York City on her two hundred and second, and final, crossing of the North Atlantic. Six days later, the ship is torpedoed off the coast of Ireland with the loss of 1,198 lives.
1945 – World War II: A German newsreader officially announces that Adolf Hitler has "fallen at his command post in the Reich Chancellery fighting to the last breath against Bolshevism and for Germany". The Soviet flag is raised over the Reich Chancellery, by order of Stalin.
1945 – World War II: Nazi propaganda minister Joseph Goebbels and his wife Magda commit suicide in the Reich Garden outside the Führerbunker. Their children are also killed by having cyanide pills inserted into their mouths by their mother, Magda.
1956 – A doctor in Japan reports an "epidemic of an unknown disease of the central nervous system", marking the official discovery of Minamata disease.
1970 – Protests erupt in Seattle, following the announcement by U.S. President Richard Nixon that U.S. Forces in Vietnam would pursue enemy troops into Cambodia, a neutral country.
1971 – Amtrak (the National Railroad Passenger Corporation) takes over operation of U.S. passenger rail service.
1991 – Rickey Henderson of the Oakland Athletics steals his 939th base, making him the all-time leader in this category. However, his accomplishment is overshadowed later that evening by Nolan Ryan of the Texas Rangers, when he pitches his seventh career no-hitter, breaking his own record.