| May 9th 1927 | | Canberra replaces Melbourne as the capital of Australia
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| May 9th 1929 | | NY Giant Carl Hubbell no-hits Pitts Pirates
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| May 9th 1929 | | WJW-AM in Cleveland Ohio begins radio transmissions
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| May 9th 1930 | | 56th Preakness: Earl Sande aboard Gallant Fox wins in 2:00.6
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| May 9th 1931 | | 57th Preakness: George Ellis aboard Mate wins in 1:59
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| May 9th 1932 | | WOC-AM in Davenport Iowa merges with WHO to become WHO-WOC
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| May 9th 1932 | | Piccadilly Circus, 1st lit by electricity
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| May 9th 1932 | | 58th Preakness: Eugene James aboard Burgoo King wins in 1:59.8
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| May 9th 1933 | | Spanish anarchists call for general strike
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| May 9th 1934 | | Bradman out for a Cricket duck against Cambridge University!
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| May 9th 1936 | | 1st KLM airplane to land on Bonaire
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| May 9th 1936 | | Italy takes Addis Abba, annexing Absynnia (Ethiopia)
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| May 9th 1937 | | Reds beat Phillies 21-10 (Ernie Lombardi goes 6 for 6)
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| May 9th 1939 | | Catholic church beatified the 1st Native American, Kateri Tekakwitha
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| May 9th 1941 | | English Army breaks German spy codes
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