| 37651 | April 1 | Death | 2014 – Jacques Le Goff, French historian and author (b. 1924) |
| 37652 | April 1 | Death | 2014 – Andrew Joseph McDonald, American bishop (b. 1923) |
| 37653 | April 1 | Death | 2014 – Bill Mitchell, Canadian-American ice hockey player and coach (b. 1930) |
| 37654 | April 1 | Death | 2014 – Rolf Rendtorff, German theologian and academic (b. 1925) |
| 37655 | April 1 | Death | 2015 – John Paul Hammerschmidt, American soldier and politician (b. 1922) |
| 37656 | April 1 | Death | 2015 – Eddie LeBaron, American football player, manager, and sportscaster (b. 1930) |
| 37657 | April 1 | Death | 2015 – Cynthia Lennon, English author (b. 1939) |
| 37658 | April 1 | Death | 2015 – Misao Okawa, Japanese super-centenarian (b. 1898) |
| 37659 | April 1 | Death | 2015 – Nicolae Rainea, Romanian footballer and referee (b. 1933) |
| 37660 | April 1 | Holiday and observance | April Fools' Day or All Fools' Day |
| 37661 | April 1 | Holiday and observance | Christian feast day:Cellach of ArmaghHugh of GrenobleFrederick Denison Maurice (Episcopal Church (USA))Melito of SardisNuno Álvares PereiraTewdrigTheodoraWalric, abbot of LeuconayApril 1 (Eastern Orthodox liturgics) |
| 37662 | April 1 | Holiday and observance | Civil Service Day (Thailand) |
| 37663 | April 1 | Holiday and observance | Earliest day on which Sizdah Be-dar can fall, while April 2 is the latest celebrated on the 13th day after vernal equinox. (Iran) |
| 37664 | April 1 | Holiday and observance | Edible Book Day |
| 37665 | April 1 | Holiday and observance | Fossil Fools Day |
| 37666 | April 1 | Holiday and observance | Kha b-Nisan, the Assyrian New Year (Assyrians) |
| 37667 | April 1 | Holiday and observance | Islamic Republic Day (Iran) |
| 37668 | April 1 | Holiday and observance | Odisha Day (Odisha, India) |
| 37669 | April 1 | Holiday and observance | The Capture of Brielle, marked a turning point in the uprising of the Low Countries against Spain in the Eighty Years' War. (Brielle) |
| 37670 | April 1 | Holiday and observance | Veneralia, in honor of Venus. (Roman Empire) |
| 37671 | April 2 | Event | 1513 – Spanish explorer Juan Ponce de León first sights land in what is now Florida. |
| 37672 | April 2 | Event | 1755 – Commodore William James captures the Maratha fortress of Suvarnadurg on west coast of India. |
| 37673 | April 2 | Event | 1792 – The Coinage Act is passed establishing the United States Mint. |
| 37674 | April 2 | Event | 1800 – Ludwig van Beethoven leads the premiere of his First Symphony in Vienna. |
| 37675 | April 2 | Event | 1801 – Napoleonic Wars: Battle of Copenhagen: The British capture the Danish fleet. |
| 37676 | April 2 | Event | 1851 – Rama IV is crowned King of Thailand. |
| 37677 | April 2 | Event | 1863 – Richmond Bread Riot: Food shortages incite hundreds of angry women to riot in Richmond, Virginia, and demand that the Confederate government release emergency supplies. |
| 37678 | April 2 | Event | 1865 – American Civil War: At the Third Battle of Petersburg Virginia, the Siege of Petersburg is broken by Union Army troops capturing trenches and breaking Confederate States Army lines, forcing the Confederates under General Robert E. Lee to retreat in |
| 37679 | April 2 | Event | 1865 – American Civil War: Confederate President Jefferson Davis and most of his Cabinet flee the Confederate capital of Richmond, Virginia. |
| 37680 | April 2 | Event | 1885 – Cree warriors attack the village of Frog Lake, North-West Territories, Canada, killing nine. |