| 93908 | August 19 | Event | 1504 – In Ireland, the Hiberno-Norman de Burghs (Burkes) and Anglo-Norman Fitzgeralds fight in the Battle of Knockdoe. |
| 93909 | August 19 | Event | 1561 – Mary, Queen of Scots, who was 18 years old, returns to Scotland after spending 13 years in France. |
| 93910 | August 19 | Event | 1612 – The "Samlesbury witches", three women from the Lancashire village of Samlesbury, England, are put on trial, accused of practicing witchcraft, one of the most famous witch trials in British history. |
| 93911 | August 19 | Event | 1666 – Second Anglo-Dutch War: Rear Admiral Robert Holmes leads a raid on the Dutch island of Terschelling, destroying 150 merchant ships, an act later known as "Holmes's Bonfire". |
| 93912 | August 19 | Event | 1692 – Salem witch trials: In Salem, Province of Massachusetts Bay, five people, one woman and four men, including a clergyman, are executed after being convicted of witchcraft. |
| 93913 | August 19 | Event | 1745 – Prince Charles Edward Stuart raises his standard in Glenfinnan: The start of the Second Jacobite Rebellion, known as "the 45". |
| 93914 | August 19 | Event | 1759 – Battle of Lagos Naval battle during the Seven Years' War between Great Britain and France. |
| 93915 | August 19 | Event | 1768 – Saint Isaac's Cathedral is founded in Saint Petersburg, Russia. |
| 93916 | August 19 | Event | 1772 – Gustav III of Sweden stages a coup d'état, in which he assumes power and enacts a new constitution that divides power between the Riksdag and the King. |
| 93917 | August 19 | Event | 1782 – American Revolutionary War: Battle of Blue Licks: The last major engagement of the war, almost ten months after the surrender of the British commander Charles Cornwallis following the Siege of Yorktown. |
| 93918 | August 19 | Event | 1812 – War of 1812: American frigate USS Constitution defeats the British frigate HMS Guerriere off the coast of Nova Scotia, Canada earning the nickname "Old Ironsides". |
| 93919 | August 19 | Event | 1813 – Gervasio Antonio de Posadas joins Argentina's Second Triumvirate. |
| 93920 | August 19 | Event | 1839 – The French government announces that Louis Daguerre's photographic process is a gift "free to the world". |
| 93921 | August 19 | Event | 1848 – California Gold Rush: The New York Herald breaks the news to the East Coast of the United States of the gold rush in California (although the rush started in January). |
| 93922 | August 19 | Event | 1854 – The First Sioux War begins when United States Army soldiers kill Lakota chief Conquering Bear and in return are massacred. |
| 93923 | August 19 | Event | 1861 – First ascent of Weisshorn, fifth highest summit in the Alps. |
| 93924 | August 19 | Event | 1862 – American Indian Wars: During an uprising in Minnesota, Lakota warriors decide not to attack heavily-defended Fort Ridgely and instead turn to the settlement of New Ulm, killing white settlers along the way. |
| 93925 | August 19 | Event | 1895 – American frontier murderer and outlaw John Wesley Hardin is killed by an off-duty policeman in a saloon in El Paso, Texas. |
| 93926 | August 19 | Event | 1909 – The first automobile race at the Indianapolis Motor Speedway. |
| 93927 | August 19 | Event | 1914 – The Ottoman–Bulgarian alliance is signed in Sofia. |
| 93928 | August 19 | Event | 1919 – Afghanistan gains full independence from the United Kingdom. |
| 93929 | August 19 | Event | 1927 – Patriarch Sergius of Moscow proclaims the declaration of loyalty of the Russian Orthodox Church to the Soviet Union. |
| 93930 | August 19 | Event | 1934 – The first All-American Soap Box Derby is held in Dayton, Ohio. |
| 93901 | August 18 | Holiday and observance | Birthday of Virginia Dare (Roanoke Island) |
| 93902 | August 18 | Holiday and observance | Constitution Day (Indonesia) |
| 93903 | August 18 | Holiday and observance | Long Tan Day, also called Vietnam Veterans' Day (Australia) |
| 93904 | August 18 | Holiday and observance | National Science Day (Thailand) |
| 93905 | August 19 | Event | 295 BC – The first temple to Venus, the Roman goddess of love, beauty and fertility, is dedicated by Quintus Fabius Maximus Gurges during the Third Samnite War. |
| 93906 | August 19 | Event | 43 BC – Gaius Julius Caesar Octavianus, later known as Augustus, compels the Roman Senate to elect him Consul. |
| 93907 | August 19 | Event | 1153 – Baldwin III of Jerusalem takes control of the Kingdom of Jerusalem from his mother Melisende, and also captures Ascalon. |