| 41551 | April 10 | Death | 2015 – Richie Benaud, Australian cricketer and sportscaster (b. 1930) |
| 41552 | April 10 | Death | 2015 – Raúl Héctor Castro, Mexican-American politician and diplomat, 14th Governor of Arizona (b. 1916) |
| 41553 | April 10 | Death | 2015 – Ray Graves, American football player and coach (b. 1918) |
| 41554 | April 10 | Death | 2015 – Jin Youzhi, Chinese son of Zaifeng, Prince Chun (b. 1918) |
| 41555 | April 10 | Death | 2015 – Judith Malina, German-American actress and director, co-founded The Living Theatre (b. 1926) |
| 41556 | April 10 | Death | 2015 – Rose Francine Rogombé, Gabonese lawyer and politician, President of Gabon (b. 1942) |
| 41557 | April 10 | Death | 2015 – Peter Walsh, Australian farmer and politician, 6th Australian Minister for Finance (b. 1935) |
| 41558 | April 10 | Holiday and observance | Christian Feast Day:Fulbert of ChartresJames, Azadanus and AbdiciusMikael Agricola (Lutheran)Pierre Teilhard de Chardin (Episcopal Church)William of Ockham (Anglicanism)William Law (Anglican Communion)April 10 (Eastern Orthodox liturgics) |
| 41559 | April 10 | Holiday and observance | Day of the Builder (Azerbaijan) |
| 41560 | April 11 | Event | 491 – Flavius Anastasius becomes Byzantine emperor, with the name of Anastasius I. |
| 41561 | April 11 | Event | 1079 – Bishop Stanislaus of Kraków is executed by order of Bolesław II of Poland. |
| 41562 | April 11 | Event | 1241 – Batu Khan defeats Béla IV of Hungary at the Battle of Mohi. |
| 41563 | April 11 | Event | 1512 – War of the League of Cambrai: French forces led by Gaston de Foix win the Battle of Ravenna. |
| 41564 | April 11 | Event | 1544 – French forces defeat a Spanish army at the Battle of Ceresole. |
| 41565 | April 11 | Event | 1689 – William III and Mary II are crowned as joint sovereigns of Great Britain. |
| 41566 | April 11 | Event | 1713 – War of the Spanish Succession (Queen Anne's War): Treaty of Utrecht. |
| 41567 | April 11 | Event | 1727 – Premiere of Johann Sebastian Bach's St Matthew Passion BWV 244b at the St. Thomas Church, Leipzig |
| 41568 | April 11 | Event | 1809 – Battle of the Basque Roads Naval battle fought between France and the United Kingdom |
| 41569 | April 11 | Event | 1814 – The Treaty of Fontainebleau ends the War of the Sixth Coalition against Napoleon Bonaparte, and forces him to abdicate unconditionally for the first time. |
| 41570 | April 11 | Event | 1856 – Battle of Rivas: Juan Santamaría burns down the hostel where William Walker's filibusters are holed up. |
| 41571 | April 11 | Event | 1868 – Former Shogun Tokugawa Yoshinobu surrenders Edo Castle to Imperial forces, marking the end of the Tokugawa shogunate. |
| 41572 | April 11 | Event | 1876 – The Benevolent and Protective Order of Elks is organized. |
| 41573 | April 11 | Event | 1881 – Spelman College is founded in Atlanta, Georgia as the Atlanta Baptist Female Seminary, an institute of higher education for African-American women. |
| 41574 | April 11 | Event | 1888 – The Concertgebouw in Amsterdam is inaugurated. |
| 41575 | April 11 | Event | 1908 – SMS Blücher, the last armored cruiser to be built by the Imperial German Navy, launches. |
| 41576 | April 11 | Event | 1909 – The city of Tel Aviv is founded. |
| 41577 | April 11 | Event | 1913 – The Nevill Ground's pavilion is destroyed in a suffragette arson attack becoming the only cricket ground to be attacked by suffragettes. |
| 41578 | April 11 | Event | 1919 – The International Labour Organization is founded. |
| 41579 | April 11 | Event | 1921 – Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan. |
| 41580 | April 11 | Event | 1945 – World War II: American forces liberate the Buchenwald concentration camp. |