| 42857 | April 14 | Event | 1828 – Noah Webster copyrights the first edition of his dictionary. |
| 42858 | April 14 | Event | 1846 – The Donner Party of pioneers departs Springfield, Illinois, for California, on what will become a year-long journey of hardship, cannibalism, and survival. |
| 42859 | April 14 | Event | 1849 – Hungary declares itself independent of Austria with Lajos Kossuth as its leader. |
| 42860 | April 14 | Event | 1860 – The first Pony Express rider reaches San Francisco. |
| 42861 | April 14 | Event | 1865 – U.S. President Abraham Lincoln is shot in Ford's Theatre by John Wilkes Booth (died April 15th). |
| 42862 | April 14 | Event | 1865 – U.S. Secretary of State William H. Seward and his family are attacked in his home by Lewis Powell. |
| 42863 | April 14 | Event | 1881 – The Four Dead in Five Seconds Gunfight is fought in El Paso, Texas. |
| 42864 | April 14 | Event | 1890 – The Pan-American Union is founded by the First International Conference of American States in Washington, D.C. |
| 42865 | April 14 | Event | 1894 – The first ever commercial motion picture house opened in New York City using ten Kinetoscopes, a device for peep-show viewing of films. |
| 42866 | April 14 | Event | 1906 – The Azusa Street Revival opens and will launch Pentecostalism as a worldwide movement. |
| 42867 | April 14 | Event | 1909 – A massacre is organized by Ottoman Empire against Armenian population of Cilicia. |
| 42868 | April 14 | Event | 1912 – The British passenger liner RMS Titanic hits an iceberg in the North Atlantic at 23:40 (sinks morning of April 15th). |
| 42869 | April 14 | Event | 1927 – The first Volvo car premieres in Gothenburg, Sweden. |
| 42870 | April 14 | Event | 1928 – The Bremen, a German Junkers W33 type aircraft, reaches Greenly Island, Canada - the first successful transatlantic aeroplane flight from east to west. |
| 42841 | April 14 | Event | 43 BC – Battle of Forum Gallorum: Mark Antony, besieging Caesar's assassin Decimus Brutus in Mutina, defeats the forces of the consul Pansa, but is then immediately defeated by the army of the other consul, Aulus Hirtius. |
| 42842 | April 14 | Event | 69 – Vitellius, commander of the Rhine armies, defeats Emperor Otho in the Battle of Bedriacum and seizes the throne. |
| 42843 | April 14 | Event | 70 – Siege of Jerusalem: Titus, son of emperor Vespasian, surrounds the Jewish capital with four Roman legions. |
| 42844 | April 14 | Event | 193 – Septimius Severus is proclaimed Roman emperor by the army in Illyricum (in the Balkans). |
| 42845 | April 14 | Event | 966 – After his marriage to the Christian Doubravka of Bohemia, the pagan ruler of the Polans, Mieszko I, converts to Christianity, an event considered to be the founding of the Polish state. |
| 42846 | April 14 | Event | 1028 – Henry III, son of Conrad, is elected King of Germany. |
| 42847 | April 14 | Event | 1205 – Battle of Adrianople between Bulgarians and Crusaders. |
| 42848 | April 14 | Event | 1294 – Temür, grandson of Kublai, is elected Khagan of the Mongols and Emperor of the Yuan dynasty with the reigning titles Oljeitu and Chengzong. |
| 42849 | April 14 | Event | 1341 – Sack of Saluzzo (Italy) by Italian-Angevine troops under Manfred V, Marquess of Saluzzo. |
| 42850 | April 14 | Event | 1434 – The foundation stone of Nantes Cathedral, France is laid. |
| 42851 | April 14 | Event | 1471 – In England, the Yorkists under Edward IV defeat the Lancastrians under the Earl of Warwick at the Battle of Barnet the Earl is killed and Edward IV resumes the throne. |
| 42852 | April 14 | Event | 1639 – Imperial forces are defeated by the Swedes at the Battle of Chemnitz. The Swedish victory prolongs the Thirty Years' War and allows them to advance into Bohemia. |
| 42853 | April 14 | Event | 1699 – Khalsa: The Sikh religion was formalised as the Khalsa - the brotherhood of Warrior-Saints - by Guru Gobind Singh in northern India, in accordance with the Nanakshahi calendar. |
| 42854 | April 14 | Event | 1715 – The Yamasee War begins in South Carolina. |
| 42855 | April 14 | Event | 1775 – The first abolition society in North America is established. The Society for the Relief of Free Negroes Unlawfully Held in Bondage is organized in Philadelphia by Benjamin Franklin and Benjamin Rush. |
| 42856 | April 14 | Event | 1816 – Bussa, a slave in British-ruled Barbados, leads a slave rebellion and is killed. For this, he is remembered as the first national hero of Barbados. |