| 99271 | September 1 | Event | 2004 – The Beslan school hostage crisis commences when armed terrorists take children and adults hostage in Beslan in North Ossetia, Russia. |
| 99272 | September 1 | Birth | 1145 – Ibn Jubayr, Spanish geographer and poet (d. 1217) |
| 99273 | September 1 | Birth | 1286 – Elizabeth Richeza of Poland (d. 1335) |
| 99274 | September 1 | Birth | 1453 – Gonzalo Fernández de Córdoba, Spanish general (d. 1515) |
| 99275 | September 1 | Birth | 1566 – Edward Alleyn, English actor, founded Dulwich College (d. 1626) |
| 99276 | September 1 | Birth | 1588 – Henri, Prince of Condé (d. 1646) |
| 99277 | September 1 | Birth | 1651 – Natalya Naryshkina, Russian wife of Alexis of Russia (d. 1694) |
| 99278 | September 1 | Birth | 1653 – Johann Pachelbel, German organist, composer, and educator (d. 1706) |
| 99279 | September 1 | Birth | 1689 – Kilian Ignaz Dientzenhofer, Bohemian architect, designed Ss. Cyril and Methodius Cathedral (d. 1751) |
| 99280 | September 1 | Birth | 1711 – William IV, Prince of Orange (d. 1759) |
| 99281 | September 1 | Birth | 1726 – Johann Becker, German organist, composer, and educator (d. 1803) |
| 99282 | September 1 | Birth | 1795 – James Gordon Bennett, Sr., American publisher, founded the New York Herald (d. 1872) |
| 99283 | September 1 | Birth | 1799 – Ferenc Gyulay, Hungarian-Austrian commander and politician (d. 1868) |
| 99284 | September 1 | Birth | 1818 – José María Castro Madriz, Costa Rican lawyer and politician, 1st President of Costa Rica (d. 1892) |
| 99285 | September 1 | Birth | 1848 – Auguste Forel, Swiss myrmecologist, neuroanatomist, and psychiatrist (d. 1931) |
| 99286 | September 1 | Birth | 1850 – Jim O'Rourke, American baseball player and manager (d. 1919) |
| 99287 | September 1 | Birth | 1851 – John Clum, American journalist and agent (d. 1932) |
| 99288 | September 1 | Birth | 1854 – Engelbert Humperdinck, German playwright and composer (d. 1921) |
| 99289 | September 1 | Birth | 1855 – Innokenty Annensky, Russian poet and critic (d. 1909) |
| 99290 | September 1 | Birth | 1856 – Sergei Winogradsky, Ukrainian-Russian microbiologist and ecologist (d. 1953) |
| 99291 | September 1 | Birth | 1864 – Akashi Motojiro, Japanese general (d. 1919) |
| 99292 | September 1 | Birth | 1866 – James J. Corbett, American boxer and actor (d. 1933) |
| 99293 | September 1 | Birth | 1867 – John Gretton, 1st Baron Gretton, English sailor and politician (d. 1947) |
| 99294 | September 1 | Birth | 1868 – Henri Bourassa, Canadian publisher and politician (d. 1952) |
| 99295 | September 1 | Birth | 1871 – J. Reuben Clark, American lawyer, civil servant, and religious leader (d. 1961) |
| 99296 | September 1 | Birth | 1875 – Edgar Rice Burroughs, American soldier and author (d. 1950) |
| 99297 | September 1 | Birth | 1876 – Harriet Shaw Weaver, English journalist and activist (d. 1961) |
| 99298 | September 1 | Birth | 1877 – Francis William Aston, English chemist and physicist, Nobel Prize laureate (d. 1945) |
| 99299 | September 1 | Birth | 1877 – Rex Beach, American author, playwright, and water polo player (d. 1949) |
| 99300 | September 1 | Birth | 1878 – Princess Alexandra of Saxe-Coburg and Gotha (d. 1942) |