| 91351 | August 12 | Birth | 1988 – Justin Gaston, American singer-songwriter and actor |
| 91352 | August 12 | Birth | 1988 – Matt Gillett, Australian rugby player |
| 91353 | August 12 | Birth | 1988 – Leah Pipes, American actress |
| 91354 | August 12 | Birth | 1988 – Tejay van Garderen, American cyclist |
| 91355 | August 12 | Birth | 1989 – Tom Cleverley, English footballer |
| 91356 | August 12 | Birth | 1990 – Mario Balotelli, Italian footballer |
| 91357 | August 12 | Birth | 1990 – Enzo Pineda, Filipino actor and dancer |
| 91358 | August 12 | Birth | 1990 – Marvin Zeegelaar, Dutch footballer |
| 91359 | August 12 | Birth | 1990 – Martin Zurawsky, German footballer |
| 91360 | August 12 | Birth | 1991 – Jesinta Campbell, Australian model, Miss Universe Australia 2010 |
| 91361 | August 12 | Birth | 1992 – Cara Delevingne, English model, actress, singer |
| 91362 | August 12 | Birth | 1992 – Isabella Escobar, Guatemalan tennis player |
| 91363 | August 12 | Birth | 1992 – Teo Gheorghiu, Swiss-Canadian pianist and actor |
| 91364 | August 12 | Birth | 1992 – Jacob Loko, Australian rugby player |
| 91365 | August 12 | Birth | 1993 – Luna, South Korean actress, singer, and dancer (f(x)) |
| 91366 | August 12 | Birth | 1993 – Rodrigo Alborno, Paraguayan footballer |
| 91367 | August 12 | Birth | 1993 – Ewa Farna, Czech singer-songwriter |
| 91368 | August 12 | Birth | 1993 – Imani Hakim, American actress |
| 91369 | August 12 | Birth | 1994 – Bex Taylor-Klaus, American actress |
| 91370 | August 12 | Birth | 1996 – Torri Webster, Canadian actress and singer |
| 91371 | August 12 | Death | 30 BC – Cleopatra, Egyptian queen (b. 69 BC) |
| 91372 | August 12 | Death | 875 – Louis II of Italy (b. 825) |
| 91373 | August 12 | Death | 1424 – Yongle Emperor of China (b. 1360) |
| 91374 | August 12 | Death | 1484 – Pope Sixtus IV (b. 1414) |
| 91375 | August 12 | Death | 1577 – Thomas Smith, English scholar and diplomat (b. 1513) |
| 91376 | August 12 | Death | 1588 – Alfonso Ferrabosco the elder, Italian-English composer (b. 1543) |
| 91377 | August 12 | Death | 1612 – Giovanni Gabrieli, Italian organist and composer (b. 1557) |
| 91378 | August 12 | Death | 1633 – Jacopo Peri, Italian singer-songwriter (b. 1561) |
| 91379 | August 12 | Death | 1638 – Johannes Althusius, German jurist and philosopher (b. 1557) |
| 91380 | August 12 | Death | 1647 – Matthew Hopkins, English witch-hunter (b. 1620) |