| 26401 | March 9 | Event | 1997 – Comet Hale–Bopp: Observers in China, Mongolia and eastern Siberia are treated to a rare double feature as an eclipse permits Hale-Bopp to be seen during the day. |
| 26402 | March 9 | Event | 2011 – Space Shuttle Discovery makes its final landing after 39 flights. |
| 26403 | March 9 | Event | 2015 – Two helicopters collided near Villa Castelli, Argentina killing 10 people. |
| 26404 | March 9 | Birth | 1213 – Hugh IV, Duke of Burgundy (d. 1271) |
| 26405 | March 9 | Birth | 1285 – Emperor Go-Nijō of Japan (d. 1318) |
| 26406 | March 9 | Birth | 1454 – Amerigo Vespucci, Italian cartographer and explorer (d. 1512) |
| 26407 | March 9 | Birth | 1564 – David Fabricius, German astronomer and theologian (d. 1617) |
| 26408 | March 9 | Birth | 1568 – Aloysius Gonzaga, Italian saint (d. 1591) |
| 26409 | March 9 | Birth | 1627 – John Bowne, English-American activist (d. 1695) |
| 26410 | March 9 | Birth | 1695 – Martín Sarmiento, Spanish monk and scholar (d. 1772) |
| 26411 | March 9 | Birth | 1720 – Philip Yorke, 2nd Earl of Hardwicke, English politician, Lord Lieutenant of Cambridgeshire (d. 1790) |
| 26412 | March 9 | Birth | 1727 – Johann Gottlieb Preller, German cantor, composer, and surveyor (d. 1786) |
| 26413 | March 9 | Birth | 1737 – Josef Mysliveček, Czech violinist and composer (d. 1781) |
| 26414 | March 9 | Birth | 1749 – Honoré Gabriel Riqueti, comte de Mirabeau, French journalist and politician (d. 1791) |
| 26415 | March 9 | Birth | 1753 – Jean Baptiste Kléber, French general (d. 1800) |
| 26416 | March 9 | Birth | 1758 – Franz Joseph Gall, German neuroanatomist and physiologist (d. 1828) |
| 26417 | March 9 | Birth | 1763 – William Cobbett, English journalist and author (d. 1835) |
| 26418 | March 9 | Birth | 1806 – Edwin Forrest, American actor and philanthropist (d. 1872) |
| 26419 | March 9 | Birth | 1814 – Taras Shevchenko, Ukrainian poet and playwright (d. 1861) |
| 26420 | March 9 | Birth | 1815 – David Davis, American jurist and politician (d. 1886) |
| 26421 | March 9 | Birth | 1820 – Samuel Blatchford, American lawyer and jurist (d. 1893) |
| 26422 | March 9 | Birth | 1824 – Amasa Leland Stanford, American businessman and politician, founded Stanford University (d. 1893) |
| 26423 | March 9 | Birth | 1833 – Frederick A. Schroeder, German-American businessman and politician (d. 1899) |
| 26424 | March 9 | Birth | 1839 – Phoebe Knapp, American organist and composer (d. 1908) |
| 26425 | March 9 | Birth | 1847 – Martin Pierre Marsick, Belgian violinist, composer, and educator (d. 1924) |
| 26426 | March 9 | Birth | 1856 – Eddie Foy, Sr., American actor and dancer (d. 1928) |
| 26427 | March 9 | Birth | 1856 – Tom Roberts, English-Australian painter (d. 1931) |
| 26428 | March 9 | Birth | 1882 – Arthur Beecher Carles, American painter and academic (d. 1952) |
| 26429 | March 9 | Birth | 1887 – Fritz Lenz, German geneticist and physician (d. 1976) |
| 26430 | March 9 | Birth | 1887 – Phil Mead, English cricketer and footballer (d. 1958) |