- Ronald Reagan is president of the US
- The US officially observes Martin Luther King Day as a national holiday for the first time
- The space shuttle Challenger explodes moments after lift off, killing 6 astronauts and a teacher
- A major nuclear disaster occurs at the Chernobyl nuclear power plant in the Soviet Union
- Japanese video game maker Nintendo introduces its games to America
- US warplanes bomb Libyan headquarters in retaliation for terrorist attacks
- The Soviet Union launches the Mir space station
- IBM unveils the PC Convertible, the first laptop computer
- Charlotte Church, The Olsen twins, and Lindsay Lohan are born
- New York Mets win the World Series
- Chicago Bears win Superbowl XX
- Montreal Canadiens win the Stanley Cup
- Top Gun is the top grossing film
- "That's What Friends Are For" by Dionne & Friends spends the most time at the top of the US charts
- ALF, the Oprah Winfrey Show, and Pee-wee's Playhouse premiere