Home Box Office, otherwise known as HBO, was launched.
The tennis player Chris Evert won the first WTA Tour Championship in Florida.
Mariner IX took two photos of Mars' north pole.
Singer David Bowie performed for the first time at New York City's Carnegie Hall.
The Provisional IRA detonated twenty-two bombs in Belfast, Northern Ireland.
Elton John's 'Honky Chateau' became his first #1 album in the US, which was a significant turning point in his career.