* April 7-The King's Men perform Chapman's Bussy D ' Ambois at court.

* April 7-The King's Men perform The Winter's Tale at court.

* April 7-The Toronto Blue Jays play their first game, defeating the Chicago White Sox.

* April 7-The National Assembly passed the National Security Council ( NSC ) bill.

* April 7-The gram is decreed in France to be equal to “ the absolute weight of a volume of water equal to the cube of the hundredth part of the metre, at the temperature of melting ice .”< span style =" margin-left: 0. 1em ">< ref >

* April 7-The Lewis and Clark Expedition leaves Fort Mandan, bound for the Pacific Ocean.

* April 7-The first Canadian postage stamps are printed

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

Andre Kirk Agassi (; born April 29, 1970 in Las Vegas, Nevada ) is a retired American professional tennis player and former World No. 1, who was one of the game's most dominant players from the early 1990s to the mid 2000s.

On April 12, 1961, Soviet cosmonaut Yuri Gagarin became the first person to fly in space, reinforcing American fears about being left behind in a technological competition with the Soviet Union.

In April 1998, American photographer John S Callahan organized the first surfing project in the Andamans, starting from Phuket in Thailand with the assistance of Southeast Asia Liveaboards ( SEAL ), a UK owned dive charter company.

Phillip wrote to Townshend from Rio de Janeiro on 25 April 1783, expressing his disappointment that the ending of the American War had robbed him of the opportunity for naval glory in South America.

* 1987 – April O ' Neil, American porn actress

An American Civil rights activist, Martin Luther King, Jr. was assassinated on April 4, 1968 at the Lorraine Motel in Memphis, Tennessee.

" Migration, Radicalism, and State Security: Legislative Initiatives in the Canada and the United States c. 1794 – 1804 " in Studies in American Political Development, Volume 16, Issue 1, April 2002, 48 – 60

Benjamin Lee Whorf ( April 24, 1897 – July 26, 1941 ) was an American linguist and fire prevention engineer.

The American colonists arrived aboard the USCGC Itasca, the same vessel that brought colonists to neighboring Howland Island, on April 3, 1935.

Berinthia " Berry " Berenson Perkins ( April 14, 1948 – September 11, 2001 ) was an American photographer, actress, and model.

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

Flight 19 alone would be covered in the April 1962 issue of American Legion Magazine.

On April 1970, US President Nixon announced to the American public that US and South Vietnamese ground forces had entered Cambodia in a campaign aimed at destroying NVA base areas in Cambodia ( see Cambodian Incursion ).

The American Psychiatric Association Practice Guidelines ( April 2000 ) indicated that, among psychotherapeutic approaches, cognitive behavioral therapy and interpersonal psychotherapy had the best-documented efficacy for treatment of major depressive disorder.

September 10, 1839 – April 19, 1914 ) was an American philosopher, logician, mathematician, and scientist, sometimes known as " the father of pragmatism ".

On 14 April, two brothers blew themselves up in downtown Casablanca, one near the American Consulate, and one a few blocks away near the American Language Center.

Charles Evans Hughes, Sr. ( April 11, 1862 – August 27, 1948 ) was an American statesman, lawyer and Republican politician from New York.

it was released on the 27th of April in Ireland and the 30th of April in the UK, and features the titular character, Electra Heart, as a fictional character of Marina's creation who epitomizes the American female at her very worst, in the four " Archetypes "; the Primadonna, SuBarbieA, Homewrecker, and the Teen Idle.

Catherine Lucille Moore ( January 24, 1911 – April 4, 1987 ) was an American science fiction and fantasy writer, as C. L. Moore.

Ralph Dale Earnhardt, Sr. ( April 29, 1951February 18, 2001 ) was an American race car driver, best known for his involvement in stock car racing for NASCAR.

In Spain and Latin American countries the festival is celebrated with pranks ( inocentadas ), similar to April Fools ' Day.

Doris Day ( born Doris Mary Ann Kappelhoff, April 3, 1924 ) is an American actress, singer, and animal rights activist.

Sir Andrew John Wiles, KBE, FRS ( born 11 April 1953 ) is a British mathematician and a Royal Society Research Professor at Oxford University, specializing in number theory.

In April 1950, Hubbard and several others established the Hubbard Dianetic Research Foundation in Elizabeth, New Jersey to coordinate work related for the forthcoming publication.

In April 1990, another deliberation council, the Election Systems Research Council, submitted proposals that included the establishment of single-seat constituencies in place of the multiple-seat system.

In addition, an April 2000 CRS report by the Congressional Research Service, asserts that citizens born in Puerto Rico, are legally defined as natural born citizens and are, therefore, also eligible to be elected President.

In addition, this is reiterated by an April 2000 CRS report by the Congressional Research Service, this report asserts that citizens born in Puerto Rico, are legally defined as natural born citizens and are, therefore, also eligible to be elected President of the United States.

Among these are the Koestler Parapsychology Unit at the University of Edinburgh ; the Parapsychology Research Group at Liverpool Hope University ( this closed in April 2011 ); the SOPHIA Project at the University of Arizona ; the Consciousness and Transpersonal Psychology Research Unit of Liverpool John Moores University ; the Center for the Study of Anomalous Psychological Processes at the University of Northampton ; and the Anomalistic Psychology Research Unit at Goldsmiths, University of London.

Construction of the predecessor of the present Kamioka Observatory, the Institute for Cosmic Ray Research, University of Tokyo began in 1982 and was completed in April, 1983.

On 7 April 1986 Amstrad announced it had bought from Sinclair Research "... the worldwide rights to sell and manufacture all existing and future Sinclair computers and computer products, together with the Sinclair brand name and those intellectual property rights where they relate to computers and computer related products.

* The Nanjing Incident: Recent Research and Trends by David Askew in the Electronic Journal of Contemporary Japanese Studies, April 2002

In April 1986, Sinclair Research sold the Sinclair trademark and computer business to Amstrad for £ 5 million.

A joint Pew Research Center / Smithsonian survey from April 21 – 26, 2010 found that 31 % of Americans believed that an asteroid will collide with Earth by 2050.

On April 9, 2010, Research In Motion announced they would acquire QNX Software Systems from Harman International Industries.

In April 1992, the North Atlantic Marine Mammal Commission ( NAMMCO ) was established by the Faroe Islands, Greenland, Iceland, and Norway under the Agreement on Cooperation in Research, Conservation and Management of Marine Mammals in the North Atlantic.

* Daylighting, Chapter 2 of the SynthLight Handbook, Low Energy Architecture Research Unit, London Metropolitan University, April 2004

Doohan ( left ) visiting NASA's Dryden Flight Research Center with pilot Bruce Peterson 13 April 1967 in front of the Northrop M2-F2.

Between March 2002 and April 2003, the Werowocomoco Research Group conducted excavations and analysis at the Werowocomoco site.

-Center for Economic and Policy Research report, April 2011

The New York City Parks Department, the Holocaust Park Committee and the Jasenovac Research Institute, with the help of US Congressman Anthony Weiner, established a public monument to the victims of Jasenovac in April 2005 ( the sixtieth anniversary of the liberation of the camps.

* North Korea: Problems, Perceptions and Proposals – Oxford Research Group, April 2004

( April 2004 ) Flower Bulb Research Program Department of Horticulture, College of Agriculture and Life Sciences, Cornell University

On 21 April 2011, the company was purchased by the Kamkorp Group, which also owns electric vehicle drivetrain company Frazer-Nash Research.

The US Naval Research Laboratory group launched an Aerobee 150 during April, 1965 that was equipped with a pair of geiger counters.