Historical Events on April 13

Plessy v. Ferguson — 1896 U.S. Supreme Court case on racial segregation

Jallianwala Bagh massacre — British Indian Army troops fire their rifles into crowd of unarmed Indian civilians (1919)

Soviet–Japanese Neutrality Pact — 1941 bilateral treaty

36th Academy Awards — award ceremony presented by the Academy of Motion Picture Arts & Sciences for achievement in filmmaking in 1963

1986 Spanish Grand Prix — Formula One motor race held in 1986

1997 Argentine Grand Prix — Formula One motor race held in 1997