International Lawn Tennis Challenge
Sep 10 International Lawn Tennis Challenge, Philadelphia, PA: Vincent Richards & R. Norris Williams clinch US 7th straight title; beat Jacques Brugnon & Henri Cochet of France 6-4, 6-4, 6-2 for 3-0 lead; ends 4-1
- Sep 11 21st Davis Cup: USA beats France in Philadelphia (4-1), for their 7th straight championship
- Sep 11 Aloha Tower dedicated in Honolulu
- Sep 11 Spain leaves the League of Nations due to Germany joining
- Sep 11 Yanks' Bob Meusel ties record with 3 sacrifice flies
- Sep 16 -22] Hurricane in Florida & Alabama, kills 372
- Sep 16 Italian-Romanian peace treaty signed
- Sep 16 Philip Dunning & George Abbott's play "Broadway" premieres in NYC
- Sep 16 St Louis Cards beat Phillies 23-3
- Sep 17 Hurricane hits Miami & Palm Beach Florida; about 450 die
- Sep 18 Hurricane hits Miami, kills 250
US Men's Tennis Open
Sep 18 US National Championship Men's Tennis: Frenchman René Lacoste wins first of 2 straight US titles; beats countryman Jean Borotra 6-4, 6-0, 6-4
- Sep 19 80,000 demonstrate for democratic peace in Hague
- Sep 19 The San Siro is inaugurated with a match between AC Milan and Inter.
Attempt to Assassinate Capone
Sep 20 Bugs Moran attempts to assassinate Al Capone in a drive-by shooting but fails
- Sep 22 Belgian crown prince Leopold and Swedish Princess Astrid get engaged
Upset of the Decade
Sep 23 "Upset of the Decade" - Gene Tunney beats defending champion Jack Dempsey by 10-round unanimous decision at Sesquicentennial Stadium (later known as JFK Stadium), Philadelphia, Pennsylvania for world heavyweight boxing title
- Sep 24 Cardinals clinch NL pennant by beating Giants 6-4
40-Hour Work Week
Sep 25 Henry Ford announces an 8 hour, 5-day work week for workers at the Ford Motor Company
- Sep 25 International slavery convention signed by 20 states
Mackenzie King Re-elected
Sep 25 Mackenzie King is re-elected as Prime Minister of Canada
- Sep 25 NHL grants franchises to Chicago Black Hawks & Detroit Red Wings
PGA Championship
Sep 25 PGA Championship Men's Golf, Salisbury GC: Walter Hagen defeats Leo Diegel, 5 & 3 in the final to win his 3rd consecutive PGA C'ship title
- Sep 25 Yankees take a doubleheader from Browns to clinch AL pennant
And So to Bed
Sep 26 JB Fagan's stage drama "And So to Bed", based on the life of Samuel Pepys, premieres in London
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