| Date | Weekday | Event |
|---|
| January 9, 1788 | Wednesday | Conneticut becomes 5th state |
|
| January 9, 1793 | Wednesday | Jean Pierre Blanchard makes 1st balloon flight in North America |
| January 9, 1799 | Wednesday | 1st income tax imposed in England |
| January 9, 1839 | Wednesday | Daguerrotype process announced at French Academy of Science |
| January 9, 1839 | Wednesday | Thomas Henderson measures 1st stellar parallax Alpha Centauri |
| January 9, 1843 | Monday | Caroline Herschel "1st lady of astronomy " dies at 98 in Germany |
| January 9, 1847 | Saturday | 1st SF paper 'California Star' published |
| January 9, 1848 | Sunday | 1st commercial bank in SF established |
| January 9, 1854 | Monday | Astor Library opened in NY |
| January 9, 1861 | Wednesday | Mississippi becomes 2nd state to secede from US |
| January 9, 1903 | Friday | AL Baltimore baseball team bought to move to NY for $18 000 |
| January 9, 1912 | Tuesday | US marines invade Honduras |
| January 9, 1915 | Saturday | Exposition (now Civic) Auditorium dedicated |
| January 9, 1936 | Thursday | Semi-automatic rifles adopted by US army |
| January 9, 1945 | Tuesday | As vowed MacArthur returned to Philippines |
| January 9, 1976 | Friday | Bryan Trottier failed in 4th Islander penalty shot |
| January 9, 1978 | Monday | Commonwealth of Northern Marianas established |
| January 9, 1982 | Saturday | 5.9 earthquake in New England & Canada; 1st since 1855 |
| January 9, 1987 | Friday | New Nicaraguan constitution takes effect |