Abraham Lincoln ( February 12, 1809 – April 15, 1865 ) was the 16th President of the United States, serving from March 1861 until his assassination in April 1865.

93, pp. 2686 – 2689, April 1996.

Allan Dwan ( April 3, 1885 – December 28, 1981 ) was a pioneering Canadian-born American motion picture director, producer and screenwriter.

Albert Sidney Johnston ( February 2, 1803 – April 6, 1862 ) served as a general in three different armies: the Texas Army, the United States Army, and the Confederate States Army.

Medical Hypotheses, April 1999 ; 53 ( 4 ): 338 – 344.

Alfred Elton van Vogt ( April 26, 1912 – January 26, 2000 ) was a Canadian-born science fiction author regarded as one of the most popular and complex science fiction writers of the mid-twentieth century: the " Golden Age " of the genre.

* April Fools ' Day – April 1

* Good Friday ( Christians ) – a Friday between March 20 and April 23, being the last Friday before Easter

* Arbor Day ( Korea ) – April 5

* End of Tax Year ( UK ) – April 5

* World Health Day – April 7

* Buddha's Birthday – Traditional Date – April 8

* Araw ng Kagitingan, also known as " Bataan Day " ( Philippines ) – April 9

* Thai New Year in Thailand – April 13

* Lao New Year in Laos – April 13

* Khmer New Year in Cambodia – April 13

* Tax Day ( US ) – April 15

* 4: 20 – April 20

* Patriots ' Day – April 21

* Earth Day – April 22

* Conch Republic Independence Celebration ( Key West, Florida ) – April 23

* St George's Day Patron Saint Celebration ( England, Europe ) – April 23

After the Welsh victory at the battle of Llwchwr in January 1136 and the successful ambush of Richard Fitz Gilbert de Clare in April, south Wales rose in rebellion, starting in east Glamorgan and rapidly spreading across the rest of south Wales during 1137.

* April 24 – A Unabomber bomb kills lobbyist Gilbert Murray in Sacramento, California.

* 1264 – April – Gilbert de Clare, 6th Earl of Hertford leads a massacre of the Jews at Canterbury.

* April 15 – Richard Fitz Gilbert de Clare ( b. 1094 )

The next Gilbert and Sullivan opera, Patience, opened at the Opera Comique in April 1881 and was another big success, usurping Pinafore's position as the longest running piece in the series with the second-longest run in musical theatre history.

Pinafore, Gilbert and Sullivan visited Portsmouth in April 1878 to inspect ships.

Gilbert, Sullivan and Carte met by 24 April 1879 to make plans for a production of Pinafore in America.

* April 8 – Gilbert of Chalon, Duke of Burgundy

In December 1818, Ensign Edward Gilbert arrived with his regiment, the 25th Regiment and met Eliza Oliver ; they were married on 29 April 1820.

The work that opened the new theatre was Gilbert and Sullivan's comic opera Patience, which been running since April 1881 at the smaller Opera Comique.

After the Welsh victory at the battle of Llwchwr in January 1136 and the successful ambush of Richard Fitz Gilbert de Clare in April, south Wales rose in rebellion, starting in east Glamorgan and rapidly spreading across the rest of south Wales during 1137.

A portion of it afterward passed into the possession of Bailey Howes, his grandson, who sold 98 acres to Gilbert Bailey, April 1st 1833.

* April 3 – Richard D ' Oyly Carte, producer of Gilbert & Sullivan ( b. 1844 )

On April 7, 1994, the Royal Philharmonic Orchestra, under the direction of Sir Gilbert Levine performed at the Vatican in the historic " Papal Concert to Commemorate the Holocaust ", with the cellist Lynn Harrell as soloist and the actor Richard Dreyfuss as narrator.

* Patience ( Gilbert and Sullivan )-London production opened at the Opera-Comique Theatre on April 23 and transferred to the Savoy Theatre on October 10 for a total run of 578 performances

Serving as commander, Carrier Division 2 aboard his flagship Enterprise, Halsey led a series of hit-and-run raids against the Japanese, striking the Gilbert and Marshall islands in February, Wake Island in March, and carrying out the Doolittle Raid in April against targets on the Japanese homeland.

Margaret de Clare, Countess of Cornwall, Countess of Gloucester ( October 1293 – April 1342 ), was an English noblewoman, heiress, and the second eldest of the three daughters of Gilbert de Clare, 6th Earl of Hertford and his wife, Joan of Acre, making her a granddaughter of King Edward I of England.

Halsey led a series of hit and run raids against the Japanese, striking the Gilbert and Marshall islands in February, Wake Island in March, and carrying out the Doolittle Raid in April against targets on the Japanese homeland.

Gilbert Elliot-Murray-Kynynmound, 1st Earl of Minto PC ( 23 April 1751 – 21 June 1814 ), known as Sir Gilbert Elliott between 1777 and 1797 and as The Lord Minto between 1797 and 1813, was a Scottish politician diplomat.

Colonel Bob Denard ( April 7, 1929 – October 13, 2007 ), born Gilbert Bourgeaud, was a French soldier and mercenary.

Gilbert Ray Hodges ( April 4, 1924 – April 2, 1972 ) was an American Major League Baseball first baseman and manager.

He proved his ability as a character actor in films including The Crying Game ( 1992 ), Enchanted April ( 1992 ), Bullets Over Broadway ( 1994 ), The Borrowers ( 1997 ), and Little Voice ( 1998 ) before taking a leading role in another Mike Leigh film, Topsy-Turvy ( 1999 ), playing dramatist Sir William S. Gilbert.