| 87121 | August 1 | Holiday and observance | The beginning of autumn observances in the Northern hemisphere and spring observances in the Southern hemisphere (Neopagan Wheel of the Year):Lughnasadh in the Northern hemisphere, Imbolc in the Southern hemisphere traditionally begins on the eve of Augus |
| 87122 | August 1 | Holiday and observance | The first day of Carnaval del Pueblo (Burgess Park, London, England) |
| 87123 | August 1 | Holiday and observance | Victory Day (Cambodia, Laos, Vietnam) |
| 87124 | August 1 | Holiday and observance | World Scout Scarf Day |
| 87125 | August 1 | Holiday and observance | Yorkshire Day (Yorkshire, England) |
| 87126 | August 2 | Event | 338 BC – A Macedonian army led by Philip II defeated the combined forces of Athens and Thebes in the Battle of Chaeronea, securing Macedonian hegemony in Greece and the Aegean. |
| 87127 | August 2 | Event | 216 BC – Second Punic War: Battle of Cannae: The Carthaginian army led by Hannibal defeats a numerically superior Roman army under command of consuls Lucius Aemilius Paullus and Gaius Terentius Varro. |
| 87128 | August 2 | Event | 461 – Majorian is arrested near Tortona (Northern Italy) and deposed by the Suebian general Ricimer as puppet emperor. |
| 87129 | August 2 | Event | 1274 – Edward I of England returns from the Ninth Crusade and is crowned King seventeen days later. |
| 87130 | August 2 | Event | 1343 – Olivier de Clisson is found guilty of treason and beheaded at Les Halles in Paris. As a result, his wife, Jeanne de Clisson, sold their holding, bought a fleet of ships, and took to the sea as a pirate to seek revenge against King Philip VI of Fran |
| 87131 | August 2 | Event | 1377 – Russian troops are defeated in the Battle on Pyana River. |
| 87132 | August 2 | Event | 1610 – Henry Hudson sails into what is now known as Hudson Bay thinking he had made it through the Northwest Passage and reached the Pacific Ocean. |
| 87133 | August 2 | Event | 1776 – The signing of the United States Declaration of Independence took place. |
| 87134 | August 2 | Event | 1790 – The first United States Census is conducted. |
| 87135 | August 2 | Event | 1798 – French Revolutionary Wars: The Battle of the Nile concludes in a British victory. |
| 87136 | August 2 | Event | 1830 – Charles X of France abdicates the throne in favor of his grandson Henri. |
| 87137 | August 2 | Event | 1869 – Japan's samurai, farmer, artisan, merchant class system (Shinōkōshō) is abolished as part of the Meiji Restoration reforms. (Traditional Japanese date: June 25, 1869). |
| 87138 | August 2 | Event | 1870 – Tower Subway, the world's first underground tube railway, opens in London, England, United Kingdom. |
| 87139 | August 2 | Event | 1873 – The Clay Street Hill Railroad begins operating the first cable car in San Francisco's famous cable car system. |
| 87140 | August 2 | Event | 1897 – Anglo-Afghan War: The Siege of Malakand ends when a relief column is able to reach the British garrison in the Malakand states adjacent to India's North West Frontier Province. |
| 87141 | August 2 | Event | 1903 – Fall of the Ottoman Empire: An unsuccessful uprising led by the Internal Macedonian Revolutionary Organization against Ottoman Turkey, also known as the Ilinden–Preobrazhenie Uprising, takes place. |
| 87142 | August 2 | Event | 1916 – World War I: Austrian sabotage causes the sinking of the Italian battleship Leonardo da Vinci in Taranto. |
| 87143 | August 2 | Event | 1918 – Japan announces that it is deploying troops to Siberia in the aftermath of World War I. |
| 87144 | August 2 | Event | 1918 – The first general strike in Canadian history takes place in Vancouver. |
| 87145 | August 2 | Event | 1922 – A typhoon hits Shantou, Republic of China killing more than 50,000 people. |
| 87146 | August 2 | Event | 1923 – Vice President Calvin Coolidge becomes U.S. President upon the death of President Warren G. Harding. |
| 87147 | August 2 | Event | 1932 – The positron (antiparticle of the electron) is discovered by Carl D. Anderson. |
| 87148 | August 2 | Event | 1934 – Gleichschaltung: Adolf Hitler becomes Führer of Germany following the death of President Paul von Hindenburg. |
| 87149 | August 2 | Event | 1937 – The Marihuana Tax Act of 1937 is passed in America, the effect of which is to render marijuana and all its by-products illegal. |
| 87150 | August 2 | Event | 1939 – Albert Einstein and Leo Szilard write a letter to Franklin D. Roosevelt, urging him to begin the Manhattan Project to develop a nuclear weapon. |