| 99211 | September 1 | Event | 717 – Siege of Constantinople: The Muslim armada with 1,800 ships, is defeated by the Byzantine navy through the use of Greek fire. |
| 99212 | September 1 | Event | 1270 – King Stephen V of Hungary writes his walk to the antiquum castellum near Miholjanec, where the Sword of Attila was recently discovered. |
| 99213 | September 1 | Event | 1355 – King Tvrtko I of Bosnia writes In castro nostro Vizoka vocatum from the Old town of Visoki. |
| 99214 | September 1 | Event | 1449 – Tumu Crisis: Mongols capture the Emperor of China. |
| 99215 | September 1 | Event | 1529 – The Spanish fort of Sancti Spiritu, the first one built in modern Argentina, is destroyed by natives. |
| 99216 | September 1 | Event | 1532 – Lady Anne Boleyn is made Marquess of Pembroke by her fiancé, King Henry VIII of England. |
| 99217 | September 1 | Event | 1604 – Adi Granth, now known as Guru Granth Sahib, the holy scripture of Sikhs, was first installed at Harmandir Sahib. |
| 99218 | September 1 | Event | 1644 – Battle of Tippermuir: James Graham, 1st Marquess of Montrose defeats the Earl of Wemyss's Covenanters, reviving the Royalist cause. |
| 99219 | September 1 | Event | 1715 – King Louis XIV of France dies after a reign of 72 years—the longest of any major European monarch. |
| 99220 | September 1 | Event | 1763 – Catherine II of Russia endorses Ivan Betskoy's plans for a Foundling Home in Moscow |
| 99221 | September 1 | Event | 1772 – The Mission San Luis Obispo de Tolosa is founded in San Luis Obispo, California. |
| 99222 | September 1 | Event | 1774 – Massachusetts Bay colonists rise up in the bloodless Powder Alarm. |
| 99223 | September 1 | Event | 1804 – Juno, one of the largest asteroids in the Main Belt, is discovered by the German astronomer Karl Ludwig Harding. |
| 99224 | September 1 | Event | 1831 – The high honor of Order of St. Gregory the Great is established by Pope Gregory XVI of the Vatican State to recognize high support for the Vatican or for the Pope, by a man or a woman, and not necessarily a Roman Catholic. |
| 99225 | September 1 | Event | 1836 – Narcissa Whitman, one of the first English-speaking white women to settle west of the Rocky Mountains, arrives at Walla Walla, Washington. |
| 99226 | September 1 | Event | 1862 – American Civil War: Battle of Chantilly: Confederate Army troops defeat a group of retreating Union Army troops in Chantilly, Virginia. |
| 99227 | September 1 | Event | 1864 – American Civil War: The Confederate Army General John Bell Hood orders the evacuation of Atlanta, ending a four-month siege by General William Tecumseh Sherman. |
| 99228 | September 1 | Event | 1870 – Franco-Prussian War: The Battle of Sedan is fought, resulting in a decisive Prussian victory. |
| 99229 | September 1 | Event | 1873 – Cetshwayo ascends to the throne as king of the Zulu nation following the death of his father Mpande. |
| 99230 | September 1 | Event | 1878 – Emma Nutt becomes the world's first female telephone operator when she is recruited by Alexander Graham Bell to the Boston Telephone Dispatch Company. |
| 99231 | September 1 | Event | 1880 – The army of Mohammad Ayub Khan is routed by the British at the Battle of Kandahar, ending the Second Anglo-Afghan War |
| 99232 | September 1 | Event | 1894 – Over 400 people die in the Great Hinckley Fire, a forest fire in Hinckley, Minnesota. |
| 99233 | September 1 | Event | 1897 – The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America. |
| 99234 | September 1 | Event | 1902 – A Trip to the Moon, considered one of the first science fiction films, is released in France. |
| 99235 | September 1 | Event | 1905 – Alberta and Saskatchewan join the Canadian confederation. |
| 99236 | September 1 | Event | 1906 – The International Federation of Intellectual Property Attorneys is established. |
| 99237 | September 1 | Event | 1910 – In Brazil, Sport Club Corinthians Paulista, the first Fifa World Club Championship, is founded. |
| 99238 | September 1 | Event | 1911 – The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship. |
| 99239 | September 1 | Event | 1914 – St. Petersburg, Russia, changes its name to Petrograd. |
| 99240 | September 1 | Event | 1914 – The last passenger pigeon, a female named Martha, dies in captivity in the Cincinnati Zoo. |