The Woodstock Music & Art Fair, which was billed as an Aquarian Exposition, takes place on a 600 acre dairy farm in Bethel, New York. It would run for three sometimes rainy days and feature thirty-two acts performing at all hours of the day and night. Today the festival is regarded as one of the greatest events in popular music history.

An unidentified radio signal, nicknamed the WOW Signal for the notation a scientist made on a computer readout, is briefly detected by the SETI (Search for Extra-Terrestrial Intelligence) project's Big Ear radio telescope. Despite a month of searching the same section of space, the signal is never found again.

United States Marines invade Nicaragua to support the U.S.-backed government installed there after José Santos Zelaya had resigned three years earlier. American troops remain for eleven years.

Rainey Bethea, who had been convicted of rape and murder, is hanged in Owensboro, Kentucky in what is the last public execution performed in the United States.

New York Yankees outfielder Mickey Mantle dies of complications from cancer, after receiving a liver transplant. He was one of the greatest baseball players ever, but he was also an alcoholic and played drunk, hungover, and unprepared. He once said about himself, "Sometimes I think if I had the same body and the same natural ability and someone else's brain, who knows how good a player I might have been."