- Apr 1 Bud Selig becomes CEO of Milwaukee Brewers
Event of Interest
Apr 1 John Lennon and Yoko Ono release hoax they are having dual sex change operations
John Lennon
Yoko Ono
- Apr 1 Milwaukee Brewers Baseball Club, headed by Bud Selig, purchases Seattle Pilots for $10,800,000
Event of Interest
Apr 1 US President Richard Nixon signs bill limiting cigarette advertisements from 1st Jan 1971
Richard Nixon
- Apr 1 Serious riots continue in the Ballymurphy estate in Belfast between Catholic residents and the British Army
- Apr 2 Meghalaya becomes autonomous state within India's Assam state
- Apr 2 2 men begin ascent of south face of Annapurna I, highest final stage in a wall climb in world
- Apr 3 Miriam Hargrave of England passes her drivers test on 40th attempt
- Apr 3 As part of a new 'get tough' policy in Northern Ireland, Ian Freeland of the British Army, warned that those throwing petrol bombs could be shot dead
- Apr 4 Firestone World Tournament of Champions won by Don Johnson
- Apr 4 124th Grand National: Pat Taaffe aboard Gay Trip wins
- Apr 5 WSNS TV channel 44 in Chicago, IL (IND) begins broadcasting
- Apr 7 "Effects of Gamma Rays on Man-in-the-moon Marigolds," premieres in NYC
Film Awards
Apr 7 42nd Academy Awards: "Midnight Cowboy", John Wayne & Maggie Smith win
John Wayne
Maggie Smith
Event of Interest
Apr 10 Paul McCartney officially announces the split of The Beatles
Paul McCartney
Event of Interest
Apr 12 Yankees dedicate plaques to Mickey Mantle & Joe DiMaggio
Mickey Mantle
- Apr 13 34th Masters Golf Tournament: Billy Casper wins, shooting a 279
- Apr 13 Greek composer Mikis Theordorakis freed
- Apr 13 Apollo 13 announces "Okay, Houston, we've had a problem here", as Beech-built oxygen tank explodes en route to Moon
- Apr 13 Oakland uses gold-colored bases during the club's home opener: Rules Committee subsequently bans this innovation
Music Awards
Apr 13 5th Academy of Country Music Awards: Merle Haggard and Tammy Wynette win
Merle Haggard
Tammy Wynette
- Apr 14 "Boy Friend" opens at Ambassador Theater NYC for 119 performances
- Apr 15 "Cry for Us All" closes at Broadhurst Theater NYC after 8 performances
- Apr 15 Libyan leader Gadaffi launches "Green Revolution"
- Apr 15 WMGZ TV channel 16 in Mayaguez, PR ([M]) begins broadcasting
- Apr 15 WPSJ TV channel 14 in Ponce, PR ([P]) begins broadcasting
- Apr 16 70 die in a snow crush (France)
- Apr 16 Protestant Unionist Ian Paisley wins seat formerly held by Terence O'Neill in the Stormont (North Ireland Parliament
- Apr 17 Apollo 13 limps back safely, Beech-built oxygen tank no help
- Apr 17 Paul McCartney's 1st solo album "McCartney" is released
- Apr 19 "Look to the Lilies" closes at Lunt-Fontanne NYC after 25 performances
- Apr 19 24th Tony Awards: Borstal Boy & Applause win
- Apr 19 Sandra Haynie wins LPGA Raleigh Ladies Golf Invitational
- Apr 20 74th Boston Marathon: Ron Hill of Great Britain 1st man in 2:10:30 and Sara Mae Berman of United States 1st woman in 3:05:07
- Apr 20 Bruno Kreisky becomes 1st socialist chancellor of Austria
- Apr 20 Ron Hill's 2:10:30 at Boston, sets new US marathon record
- Apr 21 Reds clout 7 HRs by 6 batters, Braves counter with 3 HRs, 6 for one team & 9 different batters for two teams, all tie or set records
- Apr 21 The Principality of Hutt River (previously Hutt River Province) secedes from Australia - it remains unrecognised by Australia or other nations
- Apr 21 The Alliance Party of Northern Ireland (APNI) is formed; it attempts to appeal to Catholics and Protestant to unite in support of moderate policies
- Apr 22 "Park" opens at John Golden Theater NYC for 5 performances
- Apr 22 First Earth Day celebrated, founded by Gaylord Nelson
- Apr 22 NY Met Jerry Grote sets record of 20 put outs by a catcher
- Apr 22 NY Met Tom Seaver strikes out last 10 Padres, for a total of 19
- Apr 22 Senators beat Yankees 2-1 in 18 innings
- Apr 24 People's Republic of China launches its 1st satellite transmitting song "East is Red"
- Apr 24 Gambia becomes a republic within the Commonwealth
- Apr 25 "Park" closes at John Golden Theater NYC after 5 performances
- Apr 25 Freda Payne releases "Band of Gold"
- Apr 25 Melanie (Safka) releases "Lay Down"
- Apr 26 "Company" opens at Alvin Theater NYC for 690 performances
- Apr 29 US and South Vietnamese forces launch an incursion into Cambodia, expanding the Vietnam War
- Apr 30 Cubs Billy Williams is 1st NLer to play in 1,000 consecutive games
- Apr 30 US troops invade Cambodia