- Sep 1 Dutch law against pirate radio goes into effect
- Sep 1 Jane Blalock/Sue Roberts wins LPGA Southgate Ladies Golf Open
- Sep 1 Train accident at Zagreb Yugoslavia, 121 killed
- Sep 1 The SR-71 Blackbird sets (and holds) the record for flying from New York to London: 1 hour 54 minutes and 56.4 seconds.
Event of Interest
Sep 2 Jerry Lewis' 9th Muscular Dystrophy telethon
Jerry Lewis
Event of Interest
Sep 2 US President Gerald Ford signs Employee Retirement Income Security Act
Gerald Ford
- Sep 3 Giants John Montefusco makes his major league debut
Event of Interest
Sep 3 NBA guard Oscar Robertson retires
Oscar Robertson
- Sep 3 US & German Democratic Republic establish diplomatic relations
- Sep 6 Saudi Arabia increases its oil buy-back price from 93 percent to 94.9 percent of posted price
- Sep 7 "Irene" closes at Minskoff Theater NYC after 605 performances
- Sep 7 Shirley Cothran (Texas), 21, crowned 47th Miss America 1975
- Sep 8 Ian Thompson wins marathon (2:13:18.8)
Event of Interest
Sep 8 US President Gerald Ford pardons former President Richard Nixon of all federal crimes
Richard Nixon
Gerald Ford
Tennis Open
Sep 8 94th Men's U.S. Open: Jimmy Connors beats Ken Rosewall (6-1, 6-0, 6-1)
Jimmy Connors
Ken Rosewall
- Sep 8 94th Women's U.S. Open: Billie Jean King beats Evonne Goolagong Cawley (3-6, 6-3, 7-5)
- Sep 10 Lou Brock ties (104) & then sets (105) baseball stolen base mark
- Sep 10 Portugal recognizes independence of Republic of Guinea-Bissau
- Sep 10 Teuvo Louhivouri sets cycling distance record of 515.8 mi in 24 hrs
- Sep 10 Controversial TV drama "Born Innocent" premieres on US NBC tv, starring Linda Blair as an abused teen in a juvenile detention home
- Sep 11 Cards beat Mets, 4-3, in 25 (7h4m), record 202 plate appearances, Félix Millán & John Milner come to bat 12 times each
Coup d'état
Sep 12 Coup overthrows Ethiopian Emperor Haile Selassie on Ethiopia's national day
Haile Selassie
- Sep 12 Jeff "Skunk" Baxter joins Doobie Brothers
- Sep 13 -17] 3 Japanese kidnap French ambassador in Hague
- Sep 13 1st broadcast of "The Rockford Files" on NBC-TV
- Sep 13 Phillies set NL record, using 27 players in a game, St Louis uses 24, tying record of 51. Phils win 7-3 in 17
- Sep 13 USSR performs nuclear test at Eastern Kazakh/Semipalitinsk USSR
- Sep 13 OPEC instructs its Secretary General to "carry out a study of supply and demand in relation to possible production controls"
- Sep 14 Charles Kowal discovers Leda, 13th satellite of Jupiter
- Sep 15 Market Square Arena in Indianapolis opens
- Sep 15 Sandra Haynie wins LPGA Charity Golf Classic
- Sep 15 Air Vietnam flight 727 is hijacked, then crashes while attempting to land with 75 on board.
- Sep 16 BART begins regular transbay service
Music Recording
- Sep 16 US President Gerald Ford announces conditional amnesty for US Vietnam War deserters
- Sep 16 US General Alexander Haig Jr. becomes NATO supreme commander in Europe
- Sep 17 Courageous (US) beats Southern Cross (Aust) in 23rd America's Cup
- Sep 18 Hurricane Fifi strikes Honduras with 110 mph winds, 5,000 die
- Sep 19 -20] Hurricane Fifi hits coast of Honduras; about 5,000 die
Event of Interest
Sep 19 The KGB begin a large-scale operation to discredit Russian novelist Aleksandr Solzhenitsyn and cut his communications with Soviet dissidents
Aleksandr Solzhenitsyn
- Sep 21 US Mariner 10 makes 2nd fly-by of Mercury
- Sep 23 "Gypsy" opens at Winter Garden Theater NYC for 120 performances
- Sep 23 BBC Ceefax begins 1st teletext service
- Sep 24 Al Kaline, Detroit Tiger, is 12th to get 3,000 hits
- Sep 24 Clarence Jones of Kintetsu Buffaloes hits his 38th HR, 1st American to win a Japanese HR title
- Sep 25 US performs nuclear test at Nevada Test Site
- Sep 25 Scientists first report that freon gases from aerosol sprays are destroying the ozone layer
- Sep 26 US performs nuclear test at Nevada Test Site
- Sep 27 -10/26] Rome: 4th bishop synod
- Sep 27 Australian National Gallery buys W de Kooning's "Woman V" for $850,000
Event of Interest
Sep 28 "Ain't Nothing Like The Real Thing" by Aretha Franklin peaks at #47
Aretha Franklin
Event of Interest
Sep 28 "Papa Don't Take No Mess Part 1" by James Brown peaks at #31
James Brown
Event of Interest
Sep 28 US 1st Lady Betty Ford undergoes a radical mastectomy
Betty Ford
Event of Interest
Sep 28 California Angel Nolan Ryan 3rd no-hitter beats Minn Twin, 4-0
Nolan Ryan
- Sep 28 John Lennon appears as guest DJ on WNEW-FM (NYC)
- Sep 28 Mick Ronson joins Mott the Hoople
- Sep 29 4th NYC Women's Marathon won by Katherine Switzer in 3:07:29
- Sep 29 5th NYC Marathon won by Norbert Sander in 2:26:30
- Sep 30 General Francisco da Costa Gomesz succeeds General António de Spínola as President of Portugal