Theater Premiere
Sep 1 Frank Wedekind's play "Herakles" premieres in Munich
Signing of the Treaty of Versailles
Sep 3 President Woodrow Wilson set out on a tour of the USA to rouse public opinion behind the Treaty of Versailles and the League of Nations
- Sep 4 British intervene in Petrograd
Historic Event
Sep 4 Mustafa Kemal Atatürk, who founded the Republic of Turkey, gathers a congress in Sivas to make decisions as to the future of Anatolia and Thrace.
- Sep 4 US National Championship Men's Tennis, Forest Hills NY: Bill Johnston wins his second US title; beats Bill Tilden 6-4, 6-4, 6-3
- Sep 9 Boston's police force strikes
- Sep 10 Cleveland Indians pitcher Ray Caldwell no-hits New York Yankees, 3-0 at the Polo Grounds, NYC
Historic Event
Sep 10 NYC welcomes home General John J. Pershing and 25,000 WWI soldiers
Agreement of Interest
Sep 12 Adolf Hitler joins the obscure German Worker's Party as its seventh member, agreeing not with worker's rights, but with its German Nationalism and antisemitism
- Sep 13 Guy Bolton & George Middleton's "Adam & Eve," premieres in NYC
- Sep 14 British regime forbids Sinn Féin Dáil
- Sep 16 American Legion incorporated by an act of US Congress
- Sep 16 Dutch Ruether beats Giants 4-3 to clinch Cincinnati 1st NL pennant
- Sep 18 Dutch second chamber accepts female suffrage
- Sep 18 Hurricane tides 16 feet above normal drowns 280 along Gulf Coast
PGA Championship
Sep 20 PGA Championship Men's Golf, Engineers CC: Defending champion Jim Barnes defeats Fred McLeod, 6 & 5 in the final
Historic Event
Sep 25 US President Woodrow Wilson suffers a breakdown in Colorado, his health never recovers
- Sep 27 British troops withdraw from the North Russian town of Archangelsk after fighting Bolsheviks/Soviets
- Sep 27 Democratic National Committee votes to allow female members
- Sep 27 Pitcher Bob Shawkey sets then Yank record with 15 strike-outs
- Sep 27 Boston Red Sox slugger Babe Ruth takes his MLB home run record to 29 with a 3rd inning blast in a 7-5 defeat at the Washington Senators' Griffith Stadium
- Sep 28 Fastest major league game (51 mins), Giants beat Phillies 6-1
- Sep 30 Avery Hopwood's "Gold Diggers" premieres in NYC
- Sep 30 Race riot at Elaine, Arkansas