| May 9th 1889 | | 15th Kentucky Derby: Thomas Kiley aboard Spokane wins in 2:34«
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| May 9th 1896 | | 1st horseless carriage show in London (featured 10 models)
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| May 9th 1899 | | Lawn mower patented
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| May 9th 1901 | | Australia opens its 1st parliament in Melbourne
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| May 9th 1901 | | Cleve's Earl Moore no-hits Chic White Sox 9 inn but loses in 10th 4-2
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| May 9th 1908 | | Dirk Fock becomes governor of Suriname
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| May 9th 1911 | | Fire breaks out at Empire Theater in Edinburgh Scotland
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| May 9th 1913 | | 17th amendment provides for election of senators by popular vote
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| May 9th 1914 | | 40th Kentucky Derby: John McCabe aboard Old Rosebud wins in 2:03.4
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| May 9th 1914 | | Pres Wilson proclaims Mother's Day
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| May 9th 1915 | | German & French fight Battle of Artois
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| May 9th 1916 | | British-France Sykes-Picot meet over division of Turkey
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| May 9th 1925 | | Cornerstone for Hebrew University, Jerusalem laid
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| May 9th 1926 | | Richard Byrd & Floyd Bennett make 1st flight over North Pole
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| May 9th 1927 | | 53rd Preakness: Whitey Abel aboard Bostonian wins in 2:01.6
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