Androcles and the Lion
Sep 1 George Bernard Shaw's play "Androcles and the Lion" premieres in London
Second Revolution
Sep 1 Zhang Xun's Wuwei Corps captures Nanjing on behalf of Emperor Yuan Shikai in the Republic of China's Second Revolution, ending Chinese independence and causing Sun Yat Sen to flee to Japan
- Sep 2 Amsterdam reroutes sewage of canals to South Seas
- Sep 5 Phillies & Braves tie record of only 1 run in a double header, Phillies win 1st game 1-0, then a scoreless tie into 10th
- Sep 6 19th US Golf Amateur Championship won by Jerry Travers
- Sep 6 1st aircraft to loop the loop - Adolphe Pégoud in France
- Sep 6 Hamilton Alerts apply for ORFU reinstatement, taking the name Hamilton Rowing Club
- Sep 9 Russian pilot Pyotr Nesterov becomes the first pilot to fly a loop, doing so in his Nieuport IV monoplane; he is arrested for ten days for endangering government property
- Sep 10 Cleveland Call & Post forms
- Sep 10 George W. Buckner, named minister to Liberia
- Sep 10 Lincoln Highway opens as 1st paved coast-to-coast highway across the United States
- Sep 14 Cubs Larry Cheney hurls record 14-hit shutout against Giants (7-0)
- Sep 15 1st US milch goat show held, Rochester, NY
- Sep 16 Thousands of women demonstrate for Dutch female suffrage
US Golf Open
Sep 20 US Open Men's Golf, The Country Club: 20-year old amateur Francis Ouimet wins his only Open title in an 18-hole playoff, 5 strokes ahead of Britons Harry Vardon & Ted Ray
- Sep 21 1st aerobatic maneuver, sustained inverted flight, performed in France
- Sep 21 Turkey and Bulgaria sign peace treaty in Constantinople
Seven Keys to Baldpate
Sep 22 George M. Cohan's play "Seven Keys to Baldpate" premieres in NYC
- Sep 22 The first batch of Indian passive resisters, consisting of 12 men and 4 women (including Mrs. Kasturba Gandhi) are arrested at Volksrust and imprisoned in Pietermaritzburg, South Africa
- Sep 23 French aviator Roland Garros (24) is 1st to fly over Mediterranean Sea
- Sep 23 Serbian troops march into Albania
- Sep 23 Women protests take place in the Free State, South Africa, led by Charlotte Maxeke, resisting government attempts to impose passes on women; passes are burnt in front of the municipal offices
- Sep 29 MLB Washington Senator Walter Johnson wins his 36th game
- Sep 29 Shubert Theater, named after Sam S. Shubert, opens at 225 W 44th St NYC
- Sep 29 The Treaty of Constantinople between Turkey and Bulgaria restores peace; the Turks recover Adrianople and Maritza River line
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