30th April is the 120th day of the year in the Gregorian Calendar (121st in Leap Year s), with 245 days remaining.
- 313 - Roman Emperor Licinius unifies the entire Eastern Roman Empire under his rule.
- troops led by Tariq Ibn-Ziyad land at Gibraltar to begin their Invasion of the Iberian Peninsula ( Al-Andalus ).
- 1006 - Supernova SN 1006 , the brightest supernova in recorded history, appears in the Constellation Lupus .
- 1483 - Orbit al calculations suggest that on this day Pluto moved inside Neptune 's orbit, making Neptune the furthest Planet from the Sun until July 23 , 1503 .
- 1492 - Spain gives Christopher Columbus his commission of exploration.
- 1671 - Petar Zrinski , the Croatia n Ban from the Zrinski family, is Executed .
- 1794 - The Battle Of Boulou is fought, in which French forces defeated the Spanish under General Union .
- 1789 - On the balcony of Federal Hall on Wall Street in New York City , George Washington takes the oath of office to become the first elected President Of The United States .
- purchases the Louisiana Territory from France for $15 million, more than doubling – overnight – the size of the young nation.
- 1812 - The Territory Of Orleans becomes the 18th U.S. State under the name Louisiana .
- 1838 - Nicaragua declares independence from the Central American Federation
- 1863 - Mexican forces attacked the French Foreign Legion in Hacienda Camarón , Mexico .
- 1871 - Camp Grant Massacre takes place in Arizona Territory .
- 1894 - Coxey's Army reaches Washington, D.C. to protest the Unemployment caused by the Panic Of 1893 .
- 1900 - Hawaii becomes a territory of the United States , with Sanford B. Dole as Governor .
- 1900 - Casey Jones dies in a train wreck in Vaughn, Mississippi , while trying to make up time on the '' Cannonball Express ''.
- 1904 - The Louisiana Purchase Exposition World's Fair opens in St. Louis, Missouri .
- 1911 - The Great Fire Of 1911 is ignited in Bangor, Maine , destroying much of the city.
- 1920 - Peru becomes a signatory to the Buenos Aires Copyright Treaty .
- 1925 - Automaker Dodge Brothers, Inc is sold to Dillon, Read & Company for USD $146 million plus $50 million for charity.
- 1927 - The Federal Industrial Institute For Women , opens in Alderson, West Virginia , as the first women's federal prison in the United States .
- 1938 - The Animated Cartoon short '' Porky's Hare Hunt '' debuts in movie theaters, introducing Bugs Bunny .
- 1939 - Franklin D. Roosevelt becomes the first President Of The United States to appear on Television .
- 1939 - The 1939 New York World's Fair opens.
- – The submarine HMS ''Seraph'' surfaces in the Mediterranean Sea off the coast of Spain to deposit a dead man planted with false invasion plans and dressed as a British military intelligence officer.
- 1945 - Adolf Hitler and Eva Braun commit suicide after being married for one day.
- 1947 - In Nevada , the Boulder Dam is officially renamed Hoover Dam again.
- 1948 - In Bogotá , Colombia , the Organization Of American States is established.
- 1966 - Anton LaVey shaves his head and founds the Church Of Satan in San Francisco , California .
- Richard Nixon announces that top White House aids H.R. Haldeman , John Ehrlichman , and others have resigned.
- forces gains control of Saigon . The Vietnam War formally ends with the unconditional surrender of South Vietnam ese President Duong Van Minh .
- 1980 - Accession of Queen Beatrix Of The Netherlands .
- 1991 - A Tropical Cyclone hits Bangladesh killing an estimated 138,000 people.
- 1993 - The World Wide Web was born at CERN .
- 1993 - During a Tennis match between #1 female tennis player Monika Seleš and Magdalena Maleeva , Günter Parche plunged a steak knife between Seleš's shoulderblades. Seleš did not return to competitive tennis for over two years.
- 1994 - Formula 1 racing driver Roland Ratzenberger becomes the first F1 driver to die at a race weekend since 1982.
- 1995 - U.S. President Bill Clinton became the first U.S. President to visit Northern Ireland .
- 1997 - Ellen DeGeneres 's character comes out of The Closet on the sitcom Ellen .
- 1999 - Cambodia joins the Association Of Southeast Asian Nations ( ASEAN ) bringing the total members to 10.
- 1999 - Neo-Nazi bomber David Copeland detonates his third bomb in front of the Admiral Duncan Pub and is arrested the night after.
- 2002 - A Referendum in Pakistan overwhelmingly approves the Presidency of Pervez Musharraf for another five years.
- 1586 - Saint Rose Of Lima , Peruvian saint (d. 1617 )
- 1602 - William Lilly , English astrologer (d. 1681 )
- 1623 - François De Laval , first bishop of New France (d. 1708 )
- 1651 - Jean-Baptiste De La Salle , French educational reformer, Catholic saint (d. 1719 )
- 1662 - Queen Mary II Of England (d. 1694 )
- 1664 - François Louis, Prince Of Conti , French general (d. 1709 )
- 1710 - Johann Kaspar Basselet Von La Rosée , Bavarian general (d. 1795 )
- 1721 - Roger Sherman , American signer of the Declaration of Independence (d. 1793 )
- 1723 - Mathurin Jacques Brisson , French naturalist (d. 1806 )
- 1777 - Carl Friedrich Gauss , German mathematician, astronomer, and physicist (d. 1855 )
- 1803 - Albrecht Graf Von Roon , Prime Minister Of Prussia (d. 1879 )
- 1829 - Ferdinand Von Hochstetter , Austrian geologist (d. 1884 )
- 1857 - Eugene Bleuler , Swiss psychiatrist (d. 1940 )
- 1865 - Max Nettlau , German anarchist and historian (d. 1944 )
- 1870 - Franz Lehar , Austrian composer (d. 1948 )
- 1876 - Orso Mario Corbino , Italian physicist (d. 1937 )
- 1877 - Alice B. Toklas , American companion of Gertrude Stein (d. 1967 )
- 1883 - Jaroslav Hašek , Czech novelist (d. 1923 )
- 1893 - Joachim Von Ribbentrop , Nazi foreign minister (d. 1946 )
- 1901 - Simon Kuznets , Ukrainian-born economist, Bank Of Sweden Prize winner (d. 1985 )
- 1902 - Theodore Schultz , American economist, Nobel Prize laureate (d. 1998 )
- 1908 - Bjarni Benediktsson , Icelandic foreign and later prime minister (d. 1970 )
- 1909 - Queen Juliana Of The Netherlands (d. 2004 )
- 1909 - F. E. McWilliam , Northern Irish sculptor (d. 1992 )
- 1916 - Claude Shannon , American engineer and mathematician (d. 2001 )
- 1916 - Robert Shaw , American conductor (d. 1999 )
- 1923 - Marianne Paegel , Austrian Nazi
- 1923 - Al Lewis , American actor and politician (d. 2006 )
- 1925 - Johnny Horton , American musician (d. 1960 )
- 1930 - Lawton Chiles , American politician (d. 1998 )
- 1933 - Willie Nelson , American musician, composer, and actor
- 1938 - Larry Niven , American author
- 1940 - Burt Young , American actor
- 1941 - Johnny Farina , American guitarist ( Santo And Johnny )
- 1943 - Bobby Vee , American singer
- 1944 - Jill Clayburgh , American actress
- 1945 - Annie Dillard , American writer
- 1945 - Michael Smith , astronaut (d. 1986 )
- 1946 - King Carl XVI Gustaf Of Sweden
- 1946 - Don Schollander , American swimmer
- 1947 - Finn Kalvik , Norwegian singer
- 1948 - Perry King , American actor
- 1949 - Phil Garner , baseball manager
- 1949 - Antonio Guterres , Prime Minister Of Portugal
- 1954 - Jane Campion , New Zealand film director
- 1955 - Nicolas Hulot , French journalist and author
- 1956 - Jorge Chaminé , Portuguese baritone
- 1956 - Lars Von Trier , Danish film director
- 1959 - Stephen Harper , Prime Minister of Canada
- 1961 - Isiah Thomas , American basketball player, coach, and team owner
- 1963 - Michael Waltrip , American race car driver
- 1964 - Barrington Levy , Jamaican musician
- 1964 - Ian Healy , former Australian Cricketer
- 1969 - Paulo Jr. , Brazilian bassist ( Sepultura )
- 1969 - Clark Vogeler , American guitarist ( The Toadies )
- 1971 - Darren Emerson , English dance music DJ ( Underworld )
- 1975 - Elliott Sadler , American race car driver
- 1981 - John O'Shea , Irish footballer
- 1982 - Kirsten Dunst , American actress
- 1982 - Lloyd Banks , American rapper
- 1983 - Troy Williamson , American football player
- 1987 - Nikki Webster , Australian pop singer and entertainer
- 65 - Lucan , Roman poet (b. 39 )
- 1063 - Emperor Renzong of China (b. 1010 )
- 1341 - John III, Duke Of Brittany (b. 1285 )
- 1439 - Richard De Beauchamp, 13th Earl Of Warwick , English military leader (b. 1382 )
- 1524 - Pierre Terrail, Seigneur De Bayard , French soldier (b. 1473 )
- 1544 - Thomas Audley, 1st Baron Audley Of Walden , Lord Chancellor Of England
- 1555 - Pope Marcellus II (b. 1501 )
- 1632 - Johan Tzerclaes, Count Of Tilly , Bavarian general (b. 1559 )
- 1642 - Dmitry Pozharsky , Russian prince (b. 1578 )
- 1660 - Petrus Scriverius , Dutch writer (b. 1576 )
- 1655 - Eustache Le Sueur , French painter (b. 1617 )
- 1696 - Robert Plot , British naturalist (b. 1640 )
- 1712 - Philipp Van Limborch , Dutch protestant theologian (b. 1633 )
- 1736 - Johann Albert Fabricius , German classical scholar and bibliographer (b. 1668 )
- 1758 - François D'Agincourt , French composer (b. 1684 )
- 1792 - John Montagu , Supposed inventor of the sandwich (b. 1718 )
- 1795 - Jean-Jacques Barthélemy , French writer and numismatist (b. 1716 )
- 1847 - Archduke Charles Of Austria , Austrian general (b. 1771 )
- 1865 - Robert Fitzroy , English admiral and meteorologist (b. 1805 )
- 1875 - Jean Frederic Waldeck , French explorer, lithographer, and cartographer (b. 1766 )
- 1883 - Édouard Manet , French painter (b. 1832 )
- 1900 - Casey Jones , American train engineer (b. 1863 )
- 1903 - Emily Stowe , Canadian physician and suffragist (b. 1831 )
- 1936 - Alfred Edward Housman , English poet (b. 1859 )
- 1943 - Otto Jespersen , Danish philologist (b. 1860 )
- 1945 - Eva Braun , Adolf Hitler 's new wife (suicide) (b. 1912 )
- 1945 - Adolf Hitler , Austrian Nazi dictator of Germany (suicide) (b. 1889 )
- 1956 - Alben W. Barkley , Vice President Of The United States (b. 1877 )
- 1970 - Inger Stevens , Swedish actress (b. 1934 )
- 1974 - Agnes Moorehead , American actress (b. 1900 )
- 1980 - Luis Muñoz Marín , Puerto Rican poet, journalist, and politician (b. 1898 )
- 1982 - Lester Bangs , American music journalist, author, and musician (b. 1949 )
- 1983 - George Balanchine , Russian-born dancer and choreographer (b. 1904 )
- 1983 - Muddy Waters , American musician (b. 1915 )
- 1985 - Charles Francis Richter , American seismologist
- 1989 - Yi, Bang-ja , Crown Princess of Korea (b. 1901 )
- 1989 - Sergio Leone , Italian filmmaker (b. 1929 )
- 1994 - Roland Ratzenberger , Austrian race car driver (b. 1960 )
- 1994 - Richard Scarry , American author (b. 1919 )
- 1998 - Nizar Qabbani , Syrian poet (b. 1926 )
- 2002 - Charlotte Von Mahlsdorf , founder of the Gründerzeit Museum in Berlin-Mahlsdorf. (b. 1928 )
- 2003 - Peter 'Possum' Bourne , New Zealand race car driver (b. 1956 )
- 2003 - Wim Van Est , Dutch cyclist (b. 1923 )
- 2003 - Mark Berger , University Of Kentucky Professor
- 2005 - Ron Todd , TGWU General Secretary ( 1985 - 1992 ) (b. 1927 )
- 2006 - Paul Spiegel (b. 1937 )
April 29 - May 1 - March 30 - March 31 - May 30 - May 31 – Listing Of All Days
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