Adolf Hitler

Adolf Hitler was an Austrian-born German politician and the leader of the Nazi Party.He was born on on 20 April 1889 and committed suicide by gunshot on 30 April 1945.

Karl Alexander Müller

 

Karl Alexander Müller was born on April 20, 1927, he is a Swiss physicist and Nobel laureate. He received the Nobel Prize in Physics in 1987 with Georg Bednorz (http://datesupdates.blogspot.in/2013/05/j-georg-bednorz.html) for their work in superconductivity in ceramic materials.

India's first satellite launched

Aryabhata was India's first satellite, named after the great Indian astronomer of the same name. It was launched by the Soviet Union on 19 April 1975 from Kapustin Yar using a Cosmos-3M launch vehicle.launch vehicle. It was built by the Indian Space Research Organization (ISRO) to gain experience in building and operating a satellite in space.

World Heritage Day

World Heritage Day is held on 18th of April every year. Its a day that represents the unique identities and cultures of the various countries and peoples of the world

World Hemophilia Day

World Hemophilia Day is an international observance  held annually on April 17 by the World Federation of Hemophilia  (WFH). It is awareness day awareness day for hemophilia and other bleeding disorders, which also serves to raise funds  and attract volunteers for the WFH. It was started in 1989; April 17 was chosen in honor of Frank Schnabel's birthday.

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Lara Dutta Bhupathi

Lara Dutta Bhupathi  was born 16 April 1978. She is an Indian Bollywood actress and Miss Universe 2000.

Wilbur Wright

Wilbur Wright, the co- inverter of airplane was born on April 16.1867and died on May30,1972.
 The Wright brothers  (Orville & Wilbur ) were two American brothers, inventors, and aviation pioneers who were credited with inventing and building the world's first successful airplane and making the first controlled, powered and sustained heavier-than-air human flight, on December 17, 1903.

First black Mayor of Chicago

Harold Lee Washington was born on April 15, 1922, he  was an American lawyer and politician who became the first African-American Mayor of Chicago serving from 1983 until his death on November 25, 1987.

Johannes Stark - Stark effect

Johannes Stark was born on April 15, 1874, he was a German physicist, and Physics Nobel Prize laureate who was closely involved with the Deutsche Physik movement under the Nazi regime. He died on 21 June 1957. He discovered the Stark effect. It is the shifting and splitting of spectral lines of atoms and molecules due to presence of an external static electric field.

 

1st Olympic games close at Athens

The 1896 Summer Olympics, officially known as the Games of the I Olympiad, was a multi-spot event  held in Athens, Greece, from April 6 to April 15, 1896. It was the first international Olympic Games held in the Modern era.

Titanic Sank

RMS Titanic was a British passenger liner that sank in the North Atlantic Ocean on 15 April 1912 ( Hit an iceberg 11:40 pm (ship's time) 14 April 1912 on her maiden voyage and sank 2h 40m later) after colliding with an iceberg during her maiden voyage from from Southampton, UK to New York City ( US ).

Vishu - Equal

"Vishu" in Sanskrit means "equal". 

Vishu is a Hindu festival celebrated in the Indian state of Kerala and in the Tulunadu region(Mangalore & Udupi districts) usually in the second week of April in  the Gregorian calender .It marks the new year in accordance with Kolla varsham the Malayalam calendar. In 2013 Vishu is celebrated on April 14.

Christiaan Huygens

Christiaan Huygens was born on April 14, 1629, he was a prominent Dutch mathematician, astronomer, physicist and horologist. His work included early telescopic studies elucidating the nature of the rings of Saturn and the discovery of its moon Titan, the invention of the pendulum clock and other investigations in timekeeping, and studies of both optics  and the centrifugal force.Huygens achieved note for his argument that light consists of waves,now known as the Huygens-Fresnel principles.

Donald James Leslie

Donald James Leslie was born on April 13, 1911. He created and manufactured the Leslie speaker that refined the sound of the Hammond organ and helped popularize electronic music. He died on September 2, 2004.

First human spaceflight launched

The first human spaceflight was launched by the Soviet Union on April 12,1961 as a part of the Vostok program , with Cosmonaut Yuri Gagarin aboard.

International Labour Organization established

The International Labour Organization (ILO) was created by the 1919 Peace Conference that followed World War I. Its original constitution, which formed part of the Treaty of Versailles, established it on 11 April 1919 as an autonomous organization associated with the League of Nations.

Arnold Orville Beckman

 

Arnold Orville Beckman was born on April 10, 1900. He was an American chemist who invented a pH meter (1934) for measuring acidity and alkalinity and the quartz spectrophotometer, an instrument which pioneered automatic chemical analysis. He died on May 18, 2004.

Constitution of Pakistan created

The Constitution of the Islamic Republic of Pakistan is the supreme law of the State of Pakistan. Drafted by the government of Zulfikar Ali Bhutto, with an additionally assistance from the country's opposition parties, it was approved by the legislative assembly on April 10 and ratified on 14 August 1973.

Facebook purchases Instagram

Facebook purchases Instagram, a photo sharing application, for $1 billion April 9,2012.