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

F. L. Lucas's article in SR's April 1 issue seemed to be a very fair and objective analysis of the New English Bible.

April 10 marked a memorable date in New York's musical history -- indeed in the musical history of the entire eastern United States.

* ANZAC Day ( Australia and New Zealand ) – April 25

** Khmer New Year, or Chol Chnam Thmey, most commonly celebrated on April 13 ( Cambodia )

** Lao New Year, or Songkan / Pi Mai Lao, generally celebrated from 13 to 15 April ( Laos )

** Thai New Year, or Songkran, celebrated from 13 to 15 April ( Thailand )

The Thai zodiac includes a Naga in place of the Dragon and begins, not at Chinese New Year, but at either on the first day of fifth month in Thai lunar calendar, or during the Songkran festival ( now celebrated every 13 – 15 April ), depending on the purpose of the use.

Formerly Longacre Square, Times Square was renamed in April 1904 after The New York Times moved its headquarters to the newly erected Times Building site of the annual ball drop on New Year's Eve.

On April 8, 1995, a staged concert was held at Carnegie Hall in New York City as a benefit for the Gay Men's Health Crisis.

A videotape released with The Wills of the New York and Washington Battle Martyrs, was aired on Al Jazeera on April 16, 2002.

An English-language version, simply titled Kristina, was staged in concert at Carnegie Hall in New York City for two nights in September 2009, yielding a live recording, and at the Royal Albert Hall for one night in April 2010.

In April 1861, early in the American Civil War, Corbett enlisted as a private in Company I of the 12 Regiment New York Militia.

Corbett was a member of the 16th New York Cavalry Regiment sent, on April 24, 1865, to apprehend John Wilkes Booth, the assassin of Abraham Lincoln, who was still at large.

*" Collier Overdue A Month ", The New York Times, April 15, 1918.

*" More Ships Hunt For Missing Cyclops ", The New York Times, April 16, 1918.

*" Haven't Given Up Hope For Cyclops ", The New York Times, April 17, 1918.

*" To Search For Missing Freighter ", The New York Times, April 11, 1926.

*" Abandon Hope For Ship ", The New York Times, April 28, 1926.

*" Vanishing Of Ship Ruled A Mystery ", The New York Times, April 14, 1964.

It seems to have been patented on April 20, 1880, in New York City by Joshua K. Ingalls.

Caltech is on the quarter system: the fall term starts in late September and ends before Christmas, the second term starts after New Years Day and ends in mid-March, and the third term starts in late March or early April and ends in early June.