American actress Carole Lombard, who was the highest paid star in Hollywood during the late 1930s, dies in the crash of TWA Flight 3, on which she was flying from Las Vegas to Los Angeles after headlining a war bond rally in support of America's military efforts. She was thirty-three years old.

Rosa Luxemburg and Karl Liebknecht, two of the most prominent socialists in Germany, are tortured and murdered by the Freikorps. Freikorps was a term applied to various paramilitary organizations that sprang up around Germany as soldiers returned in defeat from World War I. Members of these groups would later become prominent members of the SS.

The Human Be-In takes place in San Francisco's Golden Gate Park with between 20,000 to 30,000 people in attendance, their purpose being to promote their ideals of personal empowerment, cultural and political decentralization, communal living, ecological preservation, and higher consciousness. The event is considered the beginning of the famed counterculture Summer of Love.