| 27841 | March 12 | Birth | 1989 – Richard Eckersley, English footballer |
| 27842 | March 12 | Birth | 1989 – Siim Luts, Estonian footballer |
| 27843 | March 12 | Birth | 1989 – Mark Sirõk, Estonian activist |
| 27844 | March 12 | Birth | 1990 – Lawrence Clarke, English hurdler |
| 27845 | March 12 | Birth | 1990 – Kai-Fabian Schulz, German footballer |
| 27846 | March 12 | Birth | 1991 – Felix Kroos, German footballer |
| 27847 | March 12 | Birth | 1992 – Cian Bolger, Irish footballer |
| 27848 | March 12 | Birth | 1994 – Christina Grimmie, American singer-songwriter and pianist |
| 27849 | March 12 | Birth | 1994 – Tyler Patrick Jones, American actor and producer |
| 27850 | March 12 | Birth | 1995 – Kanon Fukuda, Japanese singer and voice actress (S/mileage, Minimoni, and Shugo Chara Egg!) |
| 27851 | March 12 | Birth | 1996 – Robert Bartczak, Polish footballer |
| 27852 | March 12 | Birth | 1996 – Aristo Sham, Hong Kong pianist |
| 27853 | March 12 | Birth | 1999 – Sakura Oda, Japanese singer (Morning Musume) |
| 27854 | March 12 | Birth | 2003 – Andrea Brillantes, Filipino actress |
| 27855 | March 12 | Death | 417 – Pope Innocent I |
| 27856 | March 12 | Death | 604 – Pope Gregory I (b. 540) |
| 27857 | March 12 | Death | 1289 – Demetrius II of Georgia (b. 1259) |
| 27858 | March 12 | Death | 1316 – Stefan Dragutin of Serbia (b. 1253) |
| 27859 | March 12 | Death | 1374 – Emperor Go-Kōgon of Japan (b. 1336) |
| 27860 | March 12 | Death | 1507 – Cesare Borgia, Italian cardinal (b. 1475) |
| 27861 | March 12 | Death | 1608 – Kōriki Kiyonaga, Japanese daimyo (b. 1530) |
| 27862 | March 12 | Death | 1628 – John Bull, English organist and composer (b. 1562) |
| 27863 | March 12 | Death | 1648 – Tirso de Molina, Spanish monk and poet (b. 1571) |
| 27864 | March 12 | Death | 1681 – Frans van Mieris the Elder, Dutch painter (b. 1635) |
| 27865 | March 12 | Death | 1699 – Peder Griffenfeld, Danish politician (b. 1635) |
| 27866 | March 12 | Death | 1703 – Aubrey de Vere, 20th Earl of Oxford (b. 1627) |
| 27867 | March 12 | Death | 1790 – András Hadik, Hungarian field marshal (b. 1710) |
| 27868 | March 12 | Death | 1820 – Alexander Mackenzie, Scottish explorer and politician (b. 1764) |
| 27869 | March 12 | Death | 1832 – Friedrich Kuhlau, German-Danish pianist and composer (b. 1786) |
| 27870 | March 12 | Death | 1858 – William James Blacklock, English-Scottish painter (b. 1816) |