| Date | Weekday | Event |
|---|
| September 9, 1513 | Tuesday | Battle of Flodden Fields; English defeat James IV of Scotland. |
|
| September 9, 1776 | Monday | Continental Congress authorizes the name "US" |
| September 9, 1839 | Monday | John Herschel takes the 1st glass plate photograph |
| September 9, 1850 | Monday | Territory of New Mexico Territory of Utah created. |
| September 9, 1850 | Monday | California becomes the 31st state |
| September 9, 1867 | Monday | Luxembourg gains independence. |
| September 9, 1875 | Thursday | Lotta's Fountain (Kearny & Market) dedicated |
| September 9, 1880 | Thursday | President Hayes visits SF |
| September 9, 1892 | Friday | E.E.Barnard at Lick discovers Amalthea 5th Jupiter moon |
| September 9, 1926 | Thursday | NBC created by RCA |
| September 9, 1927 | Friday | Tony Lazzeri Day at Yankee Stadium |
| September 9, 1932 | Friday | Frank Crosetti ties record strikes out twice in 1 inning |
| September 9, 1936 | Wednesday | Yanks clinch 8th pennant |
| September 9, 1942 | Wednesday | 1st bombing on continental US soil Mount Emily Or (WW2) |
| September 9, 1943 | Thursday | Italy surrenders to the Allies |
| September 9, 1944 | Saturday | Allied forces liberate Luxembourg. |
| September 9, 1944 | Saturday | Bulgaria liberated from Nazi control (National Day). |
| September 9, 1950 | Saturday | 1st use of TV laugh track - Hank McCune |
| September 9, 1960 | Friday | 4th American Football League plays 1st game (Denver 13 Boston 10). |
| September 9, 1965 | Thursday | Sandy Koufax pitches his 4th no-hitter a perfect game vs Cubs |
| September 9, 1967 | Saturday | 1st successful test flight of a Saturn V.s |
| September 9, 1971 | Thursday | John Lennon releases the "Imagine" album |
| September 9, 1975 | Tuesday | Viking 2 launched toward orbit around Mars soft landing. |
| September 9, 1976 | Thursday | Chinese communist party chairman Mao TseTung dies at 82 |
| September 9, 1977 | Friday | 1st TRS-80 computer sold. |
| September 9, 1978 | Saturday | The 3rd game of the Boston Massacre Yanks beat Red Sox 7-0 |
| September 9, 1982 | Thursday | Conestoga I 1st private rocket is launched |