12 April Events

April 12 is the 102nd day of the year (103rd in leap years) in the Gregorian calendar. There are 263 days remaining until the end of the year. This date is slightly more likely to fall on a Tuesday, Thursday or Sunday (58 in 400 years each) than on Friday or Saturday (57), and slightly less likely to occur on a Monday or Wednesday (56).

Events

238 – Gordian II loses the Battle of Carthage against the Numidian forces loyal to Maximinus Thrax and is killed. Gordian I, his father, commits suicide.
467 – Anthemius is elevated to Emperor of the Western Roman Empire.
627 – King Edwin of Northumbria is converted to Christianity by Paulinus, bishop of York.
1167 – King Karl Sverkersson of Sweden is murdered on Visingsö.
1204 – The Crusaders of the Fourth Crusade breach the walls of Constantinople and enter the city, which they completely occupy the following day.
1606 – The Union Flag is adopted as the flag of English and Scottish ships.
1776 – American Revolution: With the Halifax Resolves, the North Carolina Provincial Congress authorizes its Congressional delegation to vote for independence from Britain.
1807 – The Froberg mutiny ends when the remaining mutineers blow up the magazine of Fort Ricasoli.
1820 – Alexander Ypsilantis is declared leader of Filiki Eteria, a secret organization to overthrow Ottoman rule over Greece.
1831 – Soldiers marching on the Broughton Suspension Bridge in Manchester, England cause it to collapse.
1861 – American Civil War: Battle of Fort Sumter. The war begins with Confederate forces firing on Fort Sumter, in the harbor of Charleston, South Carolina.
1862 – American Civil War: The Andrews Raid (the Great Locomotive Chase) occurs, starting from Big Shanty, Georgia (now Kennesaw).
1864 – American Civil War: The Battle of Fort Pillow: Confederate forces kill most of the African American soldiers that surrendered at Fort Pillow, Tennessee.
1865 – American Civil War: Mobile, Alabama, falls to the Union Army.
1877 – The United Kingdom annexes the Transvaal.
1910 – SMS Zrínyi, one of the last pre-dreadnought battleships built by the Austro-Hungarian Navy, is launched.
1917 – World War I: Canadian forces successfully complete the taking of Vimy Ridge from the Germans.
1927 – Shanghai massacre of 1927: Chiang Kai-shek orders the Communist Party of China members executed in Shanghai, ending the First United Front.
1927 – Rocksprings, Texas was hit by an F5 tornado that destroyed 235 of the 247 buildings in the town and killed 72 townspeople and injured 205; third deadliest tornado in Texas history.
1928 – The Bremen, a German Junkers W 33 type aircraft, takes off for the first successful transatlantic aeroplane flight from east to west.
1934 – The strongest surface wind gust in the world at the time of 231 mph, is measured on the summit of Mount Washington, New Hampshire. It has since been surpassed.
1934 – The U.S. Auto-Lite strike begins, culminating in a five-day melee between Ohio National Guard troops and 6,000 strikers and picketers.
1937 – Sir Frank Whittle ground-tests the first jet engine designed to power an aircraft, at Rugby, England.
1945 – U.S. President Franklin D. Roosevelt dies in office; Vice President Harry Truman, becomes President upon Roosevelt's death.
1945 – The U.S. Ninth Army under General William H. Simpson crosses the Elbe River astride Magdeburg, and reached Tangermünde—only 50 miles from Berlin.
1955 – The polio vaccine, developed by Dr. Jonas Salk, is declared safe and effective.
1961 – The Soviet cosmonaut Yuri Gagarin becomes the first human to travel into outer space and perform the first manned orbital flight, Vostok 1.
1963 – The Soviet nuclear-powered submarine K-33 collides with the Finnish merchant vessel M/S Finnclipper in the Danish straits.
1970 – Soviet submarine K-8, carrying four nuclear torpedoes, sinks in the Bay of Biscay four days after a fire on board.
1980 – Samuel Doe takes control of Liberia in a coup d'état, ending over 130 years of minority Americo-Liberian rule over the country.
1981 – The first launch of a Space Shuttle (Columbia) takes place: The STS-1 mission.
1990 – Jim Gary's "Twentieth Century Dinosaurs" exhibition opens at the Smithsonian Institution National Museum of Natural History in Washington, D.C. He is the only sculptor ever invited to present a solo exhibition there.
1992 – The Euro Disney Resort officially opens with its theme park Euro Disneyland; the resort and its park's name are subsequently changed to Disneyland Paris.
1999 – United States President Bill Clinton is cited for contempt of court for giving "intentionally false statements" in a civil lawsuit; he is later fined and disbarred.
2002 – A suicide bomber blows herself up at the entrance to Jerusalem's Mahane Yehuda Market, killing seven people and wounding 104.
2007 – A suicide bomber penetrates the Green Zone and detonates in a cafeteria within a parliament building, killing Iraqi MP Mohammed Awad and wounding more than twenty other people.
2009 – Zimbabwe officially abandons the Zimbabwean dollar as its official currency.
2013 – Two suicide bombers kill three Chadian soldiers and injure dozens of civilians at a market in Kidal, Mali.
2014 – The Great Fire of Valparaíso ravages the Chilean city of Valparaíso, killing 16, displacing nearly 10,000, and destroying over 2,000 homes.

Holidays and observances

Children's Day (Bolivia)
Christian feast day:
Adoniram Judson (Episcopal Church)
Alferius
Blessed Angelo Carletti di Chivasso
Erkembode
Pope Julius I
Zeno of Verona
April 12 (Eastern Orthodox liturgics)
Commemoration of first human in space by Yuri Gagarin:
Cosmonautics Day (Russia)
International Day of Human Space Flight
Yuri's Night (International observance)
Halifax Day (North Carolina)
National Redemption Day (Liberia)

Source: wikipedia