Edward VII Meets Izvolski
Sep 5 King Edward VII of Great Britain meets Russia's Foreign Minister Alexander Izvolski in an attempt to strengthen Russia's relationship with Britain
- Sep 7 Adolph Sutro's ornate Cliff House in San Francisco destroyed by fire
- Sep 7 Ocean liner RMS Lusitania begins her maiden voyage sailing from Liverpool to New York City
- Sep 8 Pope Pius X publishes encyclical Pasceni dominici gregis (anti-modernism)
- Sep 13 Canadian Interprovincial Rugby Football Union (IRFU) forms with merge of Hamilton Tigers, Toronto Argonauts (ORFU) and Ottawa Rough Riders, Montreal FC (QRFU)
- Sep 13 Lusitania arrives in New York City after record 5 day crossing of Atlantic
- Sep 20 Pittsburgh Pirates pitcher Nick Maddox no-hits Brooklyn Superbas, 2-1 at Exposition Park, Pittsburgh
- Sep 23 Proclamation sets fineness & weight of silver & bronze coins of Canada
Symphony No. 3
Sep 25 Jean Sibelius' 3rd Symphony premiere given by the Helsinki Philharmonic Society, conducted by the composer