The Alamo and the Texas War for Independence, September 30, 1835 to April 21, 1836: Heroes, Myths, and History.

* Patriots ' Day – April 21

* Zodiac signs for the month of April are Aries ( astrology ) ( until April 19 ) and Taurus ( astrology ) ( April 21 onwards ).

* Earliest day on which Sechseläuten can fall, while April 21 is the latest ; celebrated on the third Monday in April.

| 21 April 2008

| 21 April 2008

* Battle of Landshut occurred April 21, 1809.

* Battle of Eckmühl occurred 21 – 22 April 1809.

* Leandro Alfonso Luis Ruíz y Moragas ( born 26 April 1929 ), officially recognized by Spanish Courts on 21 May 2003 as Leandro Alfonso Luis de Borbón y Ruíz Moragas

The Lunar Module Orion, with Young and Duke inside, landed north and west of the planned landing site at 104 hours, 29 minutes, and 35 seconds into the mission, at 2: 23: 35 UTC on 21 April.

National Tree Planting Day is on April 21.

Albrecht Dürer (; 21 May 1471 – 6 April 1528 ) was a German painter, printmaker, engraver, mathematician, and theorist from Nuremberg.

** April 21 ( Eastern Orthodox liturgics )

af: 21 April

hif: 21 April

ig: April 21

id: 21 April

jv: 21 April

ms: 21 April

simple: April 21

su: 21 April

yo: 21 April

* St Nicholas Lodge of Mark Master Masons No. 1188 was consecrated on the 30 March 1955, it currently meets on the third Thursday in February, April, June, August & October

Mountbatten served his final posting at the Admiralty as First Sea Lord and Chief of the Naval Staff from April 1955 to July 1959, the position which his father had held some forty years prior.

The 1st Foreign Parachute Regiment ( 1 < sup > e </ sup > Régiment Étranger Parachutiste, 1 < sup > e </ sup > REP ) was established in 1955 during the Algerian War and disbanded in April 1961 as the entire regiment rose against the French government of Charles de Gaulle ( Algiers Putsch ), in protest against moves to negotiate an end to the Algerian War and providing Algeria's independence from France.

In April 1955, oil exploration started in the kingdom with its first oil fields being discovered in 1959.

(" Medical use of hypnosis ", British Medical Journal, April 1955 )

According to a statement of proceedings published elsewhere in the same edition of the BMJ, the report was officially ‘ approved at last week ’ s Council meeting of the British Medical Association .’ ( BMA Council Proceedings, BMJ, April 23, 1955: 1019 ).

Paul J. McAuley ( born 23 April 1955 ) is a British botanist and award-winning author.

After sitting on the bench for the Pirates ' first three games, Clemente played on April 17, 1955, in the first game of a double header against the Dodgers and made his first major league hit, a ground ball that hit off the glove of shortstop Pee Wee Reese, as well as a catch-dubbed " heart-stopping " by a Pirates beat writer-to rob his Santurce teammate, Junior Gilliam.

On radio RTÉ Radio produced its first radio soap Kennedys of Castleross which began broadcasting on April 13, 1955 and ran until 1975.

The first popular science-fiction program on American television was the children's adventure serial Captain Video and His Video Rangers, which ran from June 1949 to April 1955.

' Traditional Taekwon-Do ' may refer to ITF Taekwon-Do as created by the founder of ITF Taekwon-Do General Choi Hong Hi on April 11 1955 ; or WTF Taekwondo, founded by Dr Kim Un Yong on May 25, 1973.

The name " taekwondo " was submitted by either Choi Hong Hi ( of the Oh Do Kwan ) or Song Duk Son ( of the Chung Do Kwan ), and was accepted on April 11, 1955.

The Valiant entered service in 1955, the Vulcan in 1956 and the Victor in April 1958, with the first Valiant squadron, No. 138 Squadron RAF forming at RAF Gaydon in 1955, and the first Vulcan squadron, No. 83, at RAF Waddington in May 1957.

* April 13 – Charles Christie, Canadian-born film studio owner ( d. 1955 )

Kelly headed the US delegation at the Cannes Film Festival in April 1955.

" Mind LXIV, No, 254 ( April 1955 ).

On 14 April 1955 the Post Office was renamed Tallangatta East and a new Tallangatta office opened at the new town location.

Prior to the arms deal, at the Bandung Conference in Indonesia in April 1955, Nasser was treated as the leading representative of the Arab countries and emerged as one of the key figures of the conference and the newly established Non-Aligned Movement.

* An April 1955 concert in Cleveland, Ohio including the earliest known live recordings of " Rock Around the Clock " ( Rock ' n ' Roll Show, Hydra Records, 1995 );

Dole was initiated as a Freemason of Russell Lodge No. 177, Russell, Kansas on April 19, 1955.

On 18 April 1955, fourteen representatives met at Camp Detrick in Frederick, Maryland.

In April 1955, Lim Chin Siong was elected as Assemblyman for the Bukit Timah constituency.

The notes were officially withdrawn on various dates between April 1 and May 10, 1955.

Svante Pääbo ( born 20 April 1955 ) is a Swedish biologist specializing in evolutionary genetics.