| 45451 | April 19 | Death | 2014 – Kevin Sharp, American singer (b. 1970) |
| 45452 | April 19 | Death | 2014 – Sonia Silvestre, Dominican singer (b. 1952) |
| 45453 | April 19 | Death | 2014 – Frits Thors, Dutch journalist (b. 1909) |
| 45454 | April 19 | Death | 2015 – Raymond Carr, English historian and academic (b. 1919) |
| 45455 | April 19 | Death | 2015 – William Price Fox, American journalist and author (b. 1926) |
| 45456 | April 19 | Death | 2015 – Freddie Gray, American murder victim (b. 1989) |
| 45457 | April 19 | Death | 2015 – Roy Mason, English miner and politician, Secretary of State for Defence (b. 1924) |
| 45458 | April 19 | Death | 2015 – Tom McCabe, Scottish social worker and politician (b. 1954) |
| 45459 | April 19 | Death | 2015 – Hiroyuki Nishimoto, Japanese actor (b. 1927) |
| 45460 | April 19 | Death | 2015 – Oktay Sinanoğlu, Italian-Turkish chemist and academic (b. 1935) |
| 45461 | April 19 | Holiday and observance | Beginning of the Independence Movement (Venezuela) |
| 45462 | April 19 | Holiday and observance | Bicycle Day |
| 45463 | April 19 | Holiday and observance | Christian feast day:Ælfheah of Canterbury (Anglican, Catholic)Emma of LesumExpeditusGeorge of AntiochOlaus and Laurentius Petri (Lutheran)Pope Leo IXApril 19 (Eastern Orthodox liturgics) |
| 45464 | April 19 | Holiday and observance | Dutch-American Friendship Day (United States) |
| 45465 | April 19 | Holiday and observance | Earliest day on which First Day of Summer or Sumardagurinn fyrsti can fall, while April 25 is the latest celebrated on the first Thursday after April 18. (Iceland) |
| 45466 | April 19 | Holiday and observance | King Mswati III's birthday (Swaziland) |
| 45467 | April 19 | Holiday and observance | Patriots' Day (Massachusetts, Maine, Wisconsin) |
| 45468 | April 19 | Holiday and observance | Primrose Day (United Kingdom) |
| 45469 | April 19 | Holiday and observance | Landing of the 33 Patriots Day (Uruguay) |
| 45470 | April 19 | Holiday and observance | National Health Day (Kiribati) |
| 45471 | April 20 | Event | 1303 – The Sapienza University of Rome is instituted by Pope Boniface VIII. |
| 45472 | April 20 | Event | 1453 – Three Genoese galleys and a Byzantine blockade runner fight their way through an Ottoman blockading fleet a few weeks before the fall of Constantinople. |
| 45473 | April 20 | Event | 1534 – Jacques Cartier begins his first voyage to what is today the east coast of Canada, the island of Newfoundland and Labrador. |
| 45474 | April 20 | Event | 1535 – The sun dog phenomenon observed over Stockholm and depicted in the famous painting Vädersolstavlan. |
| 45475 | April 20 | Event | 1653 – Oliver Cromwell dissolves the Rump Parliament. |
| 45476 | April 20 | Event | 1657 – Admiral Robert Blake destroys a Spanish silver fleet under heavy fire at the Battle of Santa Cruz de Tenerife. |
| 45477 | April 20 | Event | 1657 – Freedom of religion is granted to the Jews of New Amsterdam (later New York City). |
| 45478 | April 20 | Event | 1689 – The former king, James II of England, now deposed, lays siege to Derry. |
| 45479 | April 20 | Event | 1752 – Start of Konbaung–Hanthawaddy War, a new phase in the Burmese Civil War (1740–57). |
| 45480 | April 20 | Event | 1770 – The Georgian king, Erekle II, abandoned by his Russian ally Count Totleben, wins a victory over Ottoman forces at Aspindza. |