| 6451 | January 15 | Event | 1975 – The Alvor Agreement is signed, ending the Angolan War of Independence and giving Angola independence from Portugal. |
| 6452 | January 15 | Event | 1976 – Gerald Ford's would-be assassin, Sara Jane Moore, is sentenced to life in prison. |
| 6453 | January 15 | Event | 1981 – Pope John Paul II receives a delegation from Solidarity (Polish trade union) at the Vatican led by Lech Wałęsa. |
| 6454 | January 15 | Event | 1991 – The United Nations deadline for the withdrawal of Iraqi forces from occupied Kuwait expires, preparing the way for the start of Operation Desert Storm. |
| 6455 | January 15 | Event | 1991 – Elizabeth II, in her capacity as Queen of Australia, signs letters patent allowing Australia to become the first Commonwealth realm to institute its own Victoria Cross in its honours system. |
| 6456 | January 15 | Event | 1992 – The international community recognizes the independence of Slovenia and Croatia from the Socialist Federal Republic of Yugoslavia. |
| 6457 | January 15 | Event | 1993 – Salvatore Riina, the Mafia boss known as "The Beast", is arrested in Sicily, Italy after three decades as a fugitive. |
| 6458 | January 15 | Event | 2001 – Wikipedia, a free Wiki content encyclopedia, goes online. |
| 6459 | January 15 | Event | 2005 – ESA's SMART-1 lunar orbiter discovers elements such as calcium, aluminum, silicon, iron, and other surface elements on the Moon. |
| 6460 | January 15 | Event | 2007 – Barzan Ibrahim al-Tikriti, former Iraqi intelligence chief and half-brother of Saddam Hussein, and Awad Hamed al-Bandar, former chief judge of the Revolutionary Court, are executed by hanging in Iraq. |
| 6461 | January 15 | Event | 2009 – US Airways Flight 1549 makes an emergency landing in the Hudson River shortly after takeoff from LaGuardia Airport in New York, New York. All passengers and crew members survive. |
| 6462 | January 15 | Event | 2013 – A train carrying Egyptian Army recruits derails near Giza, Greater Cairo, killing 19 and injuring 120 others. |
| 6463 | January 15 | Birth | 1432 – Afonso V of Portugal (d. 1481) |
| 6464 | January 15 | Birth | 1481 – Ashikaga Yoshizumi, Japanese shogun (d. 1511) |
| 6465 | January 15 | Birth | 1538 – Maeda Toshiie, Japanese general (d. 1599) |
| 6466 | January 15 | Birth | 1622 – Molière, French actor and playwright (d. 1673) |
| 6467 | January 15 | Birth | 1671 – Abraham de la Pryme, English archaeologist and historian (d. 1704) |
| 6468 | January 15 | Birth | 1674 – Prosper Jolyot de Crébillon, French poet and playwright (d. 1762) |
| 6469 | January 15 | Birth | 1716 – Philip Livingston, American merchant and politician (d. 1778) |
| 6470 | January 15 | Birth | 1747 – John Aikin, English surgeon and author (d. 1822) |
| 6471 | January 15 | Birth | 1754 – Richard Martin, Irish activist and politician, co-founded the Royal Society for the Prevention of Cruelty to Animals (d. 1834) |
| 6472 | January 15 | Birth | 1791 – Franz Grillparzer, Austrian author, poet, and playwright (d. 1872) |
| 6473 | January 15 | Birth | 1795 – Alexander Griboyedov, Russian playwright, composer, and poet (d. 1829) |
| 6474 | January 15 | Birth | 1803 – Marjorie Fleming, Scottish poet and author (d. 1811) |
| 6475 | January 15 | Birth | 1809 – Pierre-Joseph Proudhon, French economist and politician (d. 1865) |
| 6476 | January 15 | Birth | 1812 – Peter Christen Asbjørnsen, Norwegian author and scholar (d. 1885) |
| 6477 | January 15 | Birth | 1815 – William Bickerton, English-American religious leader, 3rd President of the Church of Jesus Christ (d. 1905) |
| 6478 | January 15 | Birth | 1816 – Marie Lafarge, French murderer (d. 1852) |
| 6479 | January 15 | Birth | 1824 – Marie Duplessis, French courtier (d. 1847) |
| 6480 | January 15 | Birth | 1834 – Samuel Arza Davenport, American lawyer and politician (d. 1911) |