| 83221 | July 23 | Event | 1972 – The United States launches Landsat 1, the first Earth-resources satellite. |
| 83222 | July 23 | Event | 1974 – The Greek military junta collapses, and former Prime Minister Konstantinos Karamanlis is invited to lead the new government, beginning Greece's metapolitefsi era. |
| 83223 | July 23 | Event | 1982 – The International Whaling Commission decides to end commercial whaling by 1985-86. |
| 83224 | July 23 | Event | 1983 – Thirteen Sri Lanka Army soldiers are killed after a deadly ambush by the militant Liberation Tigers of Tamil Eelam. |
| 83225 | July 23 | Event | 1983 – Gimli Glider: Air Canada Flight 143 runs out of fuel and makes a deadstick landing at Gimli, Manitoba. |
| 83226 | July 23 | Event | 1984 – Vanessa Williams becomes the first Miss America to resign when she surrenders her crown after nude photos of her appeared in Penthouse magazine. |
| 83227 | July 23 | Event | 1986 – In London, England, Prince Andrew, Duke of York marries Sarah Ferguson at Westminster Abbey. |
| 83228 | July 23 | Event | 1988 – General Ne Win, effective ruler of Burma since 1962, resigns after pro-democracy protests. |
| 83229 | July 23 | Event | 1992 – A Vatican commission, led by Joseph Ratzinger, establishes that limiting certain rights of homosexual people and non-married couples is not equivalent to discrimination on grounds of race or gender. |
| 83230 | July 23 | Event | 1992 – Abkhazia declares independence from Georgia. |
| 83231 | July 23 | Event | 1995 – Comet Hale–Bopp is discovered it becomes visible to the naked eye on Earth nearly a year later. |
| 83232 | July 23 | Event | 1997 – Digital Equipment Corporation files antitrust charges against chipmaker Intel. |
| 83233 | July 23 | Event | 1999 – ANA Flight 61 is hijacked in Tokyo, Japan by Yuji Nishizawa. |
| 83234 | July 23 | Event | 2005 – Three bombs explode in the Naama Bay area of Sharm el-Sheikh, Egypt, killing 88 people. |
| 83235 | July 23 | Event | 2015 – NASA announces discovery of Kepler-452b by Kepler. |
| 83236 | July 23 | Birth | 1301 – Otto, Duke of Austria (d. 1339) |
| 83237 | July 23 | Birth | 1339 – Louis I, Duke of Anjou (d. 1384) |
| 83238 | July 23 | Birth | 1401 – Francesco I Sforza, Italian husband of Bianca Maria Visconti (d. 1466) |
| 83239 | July 23 | Birth | 1503 – Anne of Bohemia and Hungary (d. 1547) |
| 83240 | July 23 | Birth | 1649 – Pope Clement XI (d. 1721) |
| 83241 | July 23 | Birth | 1705 – Francis Blomefield, English historian and author (d. 1752) |
| 83242 | July 23 | Birth | 1773 – Thomas Brisbane, Scottish general and politician, 6th Governor of New South Wales (d. 1860) |
| 83243 | July 23 | Birth | 1775 – Étienne-Louis Malus, French physicist and mathematician (d. 1812) |
| 83244 | July 23 | Birth | 1777 – Philipp Otto Runge, German painter and illustrator (d. 1810) |
| 83245 | July 23 | Birth | 1796 – Franz Berwald, Swedish surgeon and composer (d. 1868) |
| 83246 | July 23 | Birth | 1823 – Alexandre-Antonin Taché, Canadian archbishop and missionary (d. 1894) |
| 83247 | July 23 | Birth | 1838 – Édouard Colonne, French violinist and conductor (d. 1910) |
| 83248 | July 23 | Birth | 1851 – Peder Severin Krøyer, Norwegian-Danish painter (d. 1909) |
| 83249 | July 23 | Birth | 1856 – Bal Gangadhar Tilak, Indian lawyer and journalist (d. 1920) |
| 83250 | July 23 | Birth | 1864 – Apolinario Mabini, Filipino lawyer and politician, 1st Prime Minister of the Philippines (d. 1903) |