Brioni Declaration is signed. The agreement was signed by Slovenia, Croatia, and Yugoslavia on the Brioni islands in Croatia. The agreement marked the end of hostilities that began with the Slovenian War of Independence. Also known as the Ten Day War, the conflict began after Slovenia declared independence from Yugoslavia.

Boris Becker becomes the youngest person to win Wimbledon at age 17. The German tennis player beat American Kevin Curren.

Sandra Day O'Connor is appointed to the U.S. Supreme Court. Appointed by President Ronald Reagan, O'Connor is the first woman to be appointed to the highest court in the United States.

President Dwight D. Eisenhower signs the Alaska Statehood Act into law. Under the law, Alaska became the 49th state of the United States of America on January 3, 1959.

Rosewell UFO sighting. An object crashed into a ranch near Roswell, New Mexico raising speculations that the object was an extraterrestrial spacecraft containing alien life forms.