- Sep 1 Tracy Austin at age 14 years, 8 months, 20 days, becomes the youngest female to play in the US Open, beating German Heidi Eisterlehner 3-6, 6-3, 6-1 in a 1st round match
- Sep 1 1st TRS-80 Model I computer sold
- Sep 1 USSR performs nuclear test at Novaya Zemlya USSR
- Sep 3 Japan's Sadaharu Oh hits 756th HR to surpass Hank Aaron's total
Event of Interest
Sep 3 Last broadcast of "The Mary Tyler Moore Show" on CBS
Mary Tyler Moore
Event of Interest
Sep 5 Jerry Lewis' 12th Muscular Dystrophy telethon
Jerry Lewis
- Sep 5 Red Army Faction kidnaps and subsequently murders West German business executive Hanns Martin Schleyer
- Sep 5 Voyager 1 (US) launched toward fly-by of Jupiter, Saturn
- Sep 6 Angels acquire Dave Kingman from Padres for cash, 9 days later Yankees buy Kingman (started with Mets) who plays in all 4 divisions in 1977
- Sep 7 Ethiopia drops diplomatic relations with Somalia
Event of Interest
Sep 7 US President Jimmy Carter and Panama's General Omar Torrijos sign the Panama Canal treaties, guaranteeing Panama control of the Panama Canal after 1999
Jimmy Carter
- Sep 7 Watergate conspirator G. Gordon Liddy is released from prison after serving 4 years and 4 1/2 months
- Sep 8 Interpol sends a resolution concerning video piracy
- Sep 8 Jimmy McCulloch quits Wings
- Sep 9 Radio Shack sells the 1st TRS-80 computer
- Sep 9 Tiger rookies Lou Whitaker & Allan Trammell debut together & will play together for 19 years
- Sep 10 Blue Jays beat Yankees 19-3 with 20 hits
- Sep 10 Christa Vahlensieck runs female world record marathon (2:34:47.5)
- Sep 10 Susan Perkins (Ohio), crowned 50th Miss America 1978
- Sep 10 Hamida Djandoubi, convicted of torture and murder, is the last person to be executed by Guillotine in France
Tennis Open
Sep 10 97th Women's U.S. Open: Chris Evert beats Wendy Turnbull (7-6, 6-2)
Chris Evert
- Sep 11 29th Emmy Awards: The Mary Tyler Moore Show, Carroll O'Conner & Bea Arthur win
- Sep 11 97th Men's U.S. Open: Guillermo Vilas beats Jimmy Connors (2-6, 6-3, 7-6, 6-0)
- Sep 12 Anti-apartheid activist Steve Biko dies in police custody from his injuries after being beaten and tortured by police
- Sep 13 1st TV viewer discretion warning-Soap
- Sep 13 2nd Test Cricket of Space Shuttle Enterprise
- Sep 13 General Motors introduces 1st US diesel auto (Oldsmobile 88)
- Sep 14 Christmas Tinto sentenced to 7 years in Robben Island, South Africa
- Sep 15 "Man of La Mancha" opens at Palace Theater NYC for 124 performances
- Sep 15 Orioles forfeit to Blue Jays when mgr Earl Weaver pulls team off field in 5th citing hazardous condition (small tarpaulin on bullpen mound)
- Sep 15 US President Jimmy Carter meets with 15 record company executives
- Sep 15 US performs nuclear test at Nevada Test Site
- Sep 15 TV LA drama "CHiPs" debuts on NBC in US
- Sep 16 90 minute pilot of "Logan's Run" premieres on TV
Event of Interest
Sep 16 Ringo Starr releases "Drowning in Sea of Love"
Ringo Starr
- Sep 16 Seattle beats Royals, 4-1, to end KC's winning streak at 16 games
- Sep 17 22nd Ryder Cup: US, 12½-13½ at Royal Lytham & St Annes England
- Sep 17 China performs nuclear test at Lop Nor, PRC
- Sep 17 Dave Kingman hits his 1st Yankee homer, Reggie hits 2 more
- Sep 17 Fleetwood Mac's "Rumors" is #1 for 19th straight week
- Sep 18 Brooks Robinson Night in Baltimore
- Sep 18 Courageous (US) sweeps Australia (Aust) in 24th America's Cup
- Sep 18 Joanne Carner/Judy Rankin wins LPGA National Team Golf Championship
- Sep 18 US Voyager I takes 1st space photograph of Earth & Moon together
- Sep 18 2nd Toronto International Film Festival opens
- Sep 20 "Estrada" opens at Majestic Theater NYC for 7 performances
- Sep 20 Vietnam & Djibouti ask for membership in UN
- Sep 21 US minister of Foreign affairs Cyrus Vance dismissed
- Sep 22 Minn Twin Bert Blyleven no-hits California Angels, 9-0
- Sep 22 Preston Jones' "Texas Trilogy" premieres in NYC
- Sep 22 West German Red Army Faction terrorist kills policeman in Utrecht
- Sep 23 3rd test of Space Shuttle Enterprise
- Sep 23 Cheryl Ladd replaces Farrah Fawcett on TV show "Charlie's Angels"
- Sep 23 "I Just Fall in Love Again" single released by The Carpenters
- Sep 24 "Estrada" closes at Majestic Theater NYC after 7 performances
- Sep 24 1st broadcast of "Love Boat" on ABC-TV
- Sep 24 Ken Hinton of CFL British Columbia Lions returns a punt 130 yards
- Sep 26 Cleveland Browns play their 1st overtime game, beat Patriots 30-27
- Sep 26 Sir Freddie Laker begins cut-rate "Skytrain" service, London to NY
- Sep 27 Phillies clinch 2nd straight NL East Division title
- Sep 29 "Star Wars Theme/Cantina Band" by Meco hits #1
- Sep 29 Eva Shain is 1st woman to referee a heavyweight championship
Event of Interest
Sep 29 James Brown's band walks out claiming they were underpaid & overworked
James Brown
Boxing Title Fight
Sep 29 Muhammad Ali beats Earnie Shavers in 15 for heavyweight boxing title
Muhammad Ali
- Sep 29 Peter Schats circus opera "Houdini" premieres in Amsterdam
- Sep 29 Soviet space station Salyut 6 launched into Earth orbit
- Sep 30 Dutch Antillean government-Evertsz resigns
- Sep 30 Ringo Starr releases "Ringo the 4th" album
- Sep 30 USSR performs nuclear test at Novaya Zemlya USSR
- Sep 30 Due to US budget cuts, the Apollo program's ALSEP experiment packages left on the Moon are shut down.
- Sep 30 Philippine political prisoners, Eugenio Lopez, Jr. and Sergio Osmeña III successfully escaped from Fort Bonifacio Maximum Security Prison in the Philippines