| 40621 | April 8 | Birth | 1989 – Gabriella Wilde, English actress |
| 40622 | April 8 | Birth | 1990 – Kim Jonghyun, South Korean singer-songwriter, dancer, and actor (Shinee and SM the Ballad) |
| 40623 | April 8 | Birth | 1991 – Minami Takahashi, Japanese singer and actress (AKB48 and no3b) |
| 40624 | April 8 | Birth | 1993 – Gaku Matsumoto, Japanese actor |
| 40625 | April 8 | Birth | 1993 – Kanae Yoshii, Japanese singer and actress (9nine) |
| 40626 | April 8 | Death | 217 – Caracalla, Roman emperor (b. 188) |
| 40627 | April 8 | Death | 622 – Prince Shōtoku of Japan (b. 572) |
| 40628 | April 8 | Death | 632 – Charibert II, Frankish king (b. 607) |
| 40629 | April 8 | Death | 956 – Gilbert, Duke of Burgundy |
| 40630 | April 8 | Death | 1143 – John II Komnenos, Byzantine emperor (b. 1087) |
| 40631 | April 8 | Death | 1364 – John II of France (b. 1319) |
| 40632 | April 8 | Death | 1450 – Sejong the Great, Korean king (b. 1397) |
| 40633 | April 8 | Death | 1461 – Georg von Peuerbach, German mathematician and astronomer (b. 1423) |
| 40634 | April 8 | Death | 1551 – Oda Nobuhide, Japanese warlord (b. 1510) |
| 40635 | April 8 | Death | 1586 – Martin Chemnitz, Lutheran theologian and reformer (b. 1522) |
| 40636 | April 8 | Death | 1612 – Anne Catherine of Brandenburg (b. 1575) |
| 40637 | April 8 | Death | 1691 – Carlo Rainaldi, Italian architect, designed the Santa Maria dei Miracoli and Santa Maria in Montesanto (b. 1611) |
| 40638 | April 8 | Death | 1697 – Niels Juel, Norwegian-Danish admiral (b. 1629) |
| 40639 | April 8 | Death | 1704 – Hiob Ludolf, German orientalist and philologist (b. 1624) |
| 40640 | April 8 | Death | 1704 – Henry Sydney, 1st Earl of Romney, English colonel and politician, Lord Lieutenant of Ireland (b. 1641) |
| 40641 | April 8 | Death | 1725 – John Wise, American minister (b. 1652) |
| 40642 | April 8 | Death | 1735 – Francis II Rákóczi, Hungarian prince (b. 1676) |
| 40643 | April 8 | Death | 1839 – Du Pre Alexander, 2nd Earl of Caledon (b. 1777) |
| 40644 | April 8 | Death | 1848 – Gaetano Donizetti, Italian composer (b. 1797) |
| 40645 | April 8 | Death | 1857 – Mangal Pandey, Indian soldier (b. 1827) |
| 40646 | April 8 | Death | 1861 – Elisha Otis, American businessman, founded the Otis Elevator Company (b. 1811) |
| 40647 | April 8 | Death | 1870 – Charles Auguste de Bériot, Belgian violinist and composer (b. 1802) |
| 40648 | April 8 | Death | 1894 – Bankim Chandra Chattopadhyay, Indian journalist, author, and poet (b. 1838) |
| 40649 | April 8 | Death | 1906 – Auguste Deter, German woman, first person diagnosed with Alzheimer's disease (b. 1850) |
| 40650 | April 8 | Death | 1919 – Loránd Eötvös, Hungarian physicist, academic, and politician, Hungarian Minister of Education (b. 1848) |