World Book and Copyright Day

World Book Day or World Book and Copyright Day is a yearly event on 23 April, organized by UNESCO to promote reading, publishing and copyright. It is also known as International Day of the Book or World Book Days.  In the United Kingdom, the day is instead recognized on the first Thursday in March. World Book Day was celebrated for the first time on 23 April 1995.

The first video was uploaded to YouTube.com

YouTube is a video-sharing website, created by three former PayPal  employees in February 2005, on which users can upload, view and share videos.The first YouTube video was entitled Me at the zoo,and shows co-founder Jawed Karim at the San Diego Zoo. The video was uploaded on April 23, 2005, and can still be viewed on the site.

Steve Fossett

James Stephen "Steve" Fossett was an American businessman, and a record-setting aviator, sailor, and adventurer. He was Born on April 22, 1944 and he was the first person to fly solo nonstop around the world in a balloon and first to cross Pacific in a balloon. He died on September 3, 2007.

The first human eye transplant

On April 22, 1969, doctors at Methodist Hospital in Houston performed what was billed as the first human eye transplant on John Madden, 54, owner of a photography studio. The donor eye was taken from a man who had died of a brain tumor and the donor cornea,lens and iris were given to Madden. Although the transplant failed to restore Madden's sight--it has been reported that the donor eye was not preserved enough to keep it viable--the historic procedure was considered a medical miracle.

Earth Day

 

Earth Day is an annual day on which events are held worldwide to demonstrate support for environmental protection. Earth Day is observed on April 22 each year. The April 22 date was designated as International Mother Earth Day by a consensus resolution adopted by the UN in 2009. It is celebrated in more than 192 countries every year.

Thrissur Pooram

 

Thrissur Pooram  is one of the most popular temple festivals of the South Indian state Kerala. It is held at Vadakkunnathan every year on 'Pooram'  day of the Malayalam Calender month of 'Medam'. 'Pooram' day is the day when the moon rises with the Pooram star. In 2013 its Pooram is on April 21.

 

The World Digital Library.

On 21 April 2009 UNESCO along with 32 partner institutions  launched The World Digital Library. The World Digital Library (WDL) is an international digital library operated by UNESCO and the United States Library of Congress. The web site features free unlimited access to cultural material from around the world, including manuscripts, maps, rare books, films, sound recordings, prints, and photographs.

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.

Boeing 737 - First flight

The Boeing 737 made its first flight on April 9, 1967. It is a short- to medium-range twin-engine narrow-body jet airliner. Originally developed as a shorter, lower-cost twin-engine airliner derived from Boeing's707 and 727, the 737 has developed into a family of nine passenger models with a capacity of 85 to 215 passengers.

 

First female Prime Minister of Britain passed away

Margaret Hilda Thatcher, Baroness Thatcher, the first woman to become British prime minister, has died at the age of 87 on April 8,2013. She was a British politician, the longest-serving (1979–1990) Prime Minister of UK of the 20th century, and the only woman ever to have held the post and she was called the "Iron Lady" for her personal and political toughness.. She was born on 13 October 1925. 

Discovery Island opened & closed

Discovery Island is an 11.5 acres island  in Bay Lake at Walt Disney World in Bay Lake, Florida .

The island opened as Treasure Island on April 8, 1974, as a place to observe wildlife, and was later renamed Discovery Island when it was recognized as a zoological park. It closed to the public on April 8, 1999, but continued to operate until July 9, 1999.

World Health Organization established

World Health Organization (WHO) is a specialized agency of the UN that is concerned with international public health. It was established on 7 April 1948, with headquarters in Geneva , Switzerland, and is a member of the United Nations Development Group.

World Health Day

World Health Day is celebrated on 7 April to mark the anniversary of the founding of WHO in 1948. Each year a theme is selected for World Health Day that highlights a priority area of public health concern in the world. The theme for 2013 is high blood pressure

A solo voyage round the world.

Indian Navy officer Lt Commander Abhilash Tomy, The first Indian who embarked on a non-stop solo circumnavigation of the globe on a sail boat. He completes his voyage on April 6,2013.
He was the first Indian and the second Asian after Japanese Minoru Saito to attain the feat.

 

 

1st Modern Olympic games officially opens in 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 15, 1896. It was the first international Olympic Games held in the Modern era.

National Maritime Day of India

National Maritime Day of India falls on April 5. First celebrated on 5th April, 1964, the day marks the journey of SS Loyalty, the first ship of the Scindia Steam Navigation Company, to the United Kingdom.

The first successful artificial heart implant

On April 4, 1969, Dr. Denton Cooley, a Houston heart surgeon, performed the first successful artificial heart implant on a human patient. The artificial heart was actually developed by Cooley's cross-town rival and former colleague, Dr. Michael DeBakey, and his team. Cooley's implant operation turned the rivalry with DeBakey into a full-fledged feud that lasted for the next 40 years. DeBakey considered it a betrayal and a theft of his technology.

Father of British Neurology

John Hughlings Jackson who is known as the father of British neurology was born April 4, 1835, who studies of epilepsy, speech defects, and nervous-system disorders arising from injury to the brain and spinal cord helped to define modern neurology. He died Oct. 7, 1911.

Luna 10 orbits Moon

The Luna 10 spacecraft was launched towards the Moon from an Earth orbiting platform on March 31, 1966. The spacecraft entered lunar orbit on April 3, 1966 and completed its first orbit 3 hours later.

John Paul II dies

John Paul II sometimes called Blessed John Paul or John Paul the Great, born 18 May 1920 and died 2 April 2005, reigned as Pope of the Roman Catholic Church from 1978 until his death in 2005. He was the second longest serving Pope in history and the first non Italian since 1523.

April Fools' Day

April Fools' Day is celebrated in many countries on April 1 every year. Sometimes referred to as All Fools' Day, it is widely recognized and celebrated as a day when people play practical jokes and hoaxes on each other.

Gmail was launched

Gmail is a free, advertising-supported email service provided by Google. Users may access Gmail as secure webmail, as well as via POP3 or IMAP4 protocols. Gmail was launched as an invitation-only beta release on April 1, 2004 and it became available to the general public on February 7, 2007.

The Eiffel Tower

The Eiffel Tower is one of the most famous monuments in the world (324 meters, 10,100 tonnes) it opens on 31 March 1889, it is dedicated in Paris in a ceremony presided over by Gustave Eiffel, the tower's designer, and attended by French Prime Minister Pierre Tirard, a handful of other dignitaries, and 200 construction workers.It was built for the World Fair, where it was the star attraction.

Invention of the phototransistor was announce

The invention of the phototransistor was announced on March 30,1950 ( Murray Hill NJ). This was a transistor operated by light rather than electric current, invented by Dr. John Northrup Shive of the Bell Telephone Laboratories at Murray Hill, N.J. It used a tiny chip of germanium, a semiconductor material, but only a single collector wire. The tip of this wire rests in a small dimple ground into one side of the germanium disk. At this point the germanium disk is only three thousandths of an inch thick. Light focussed on the opposite, un-dimpled side of the disk can control the flow of current in the wire, thus making a control device similar in function to a photo-electric cell.

The first spacecraft to reach the planet Mercury

Mariner 10 was an American robotic space probe launched by NASA  on November 3, 1973, to fly by the planets Mercury and Venus The First Mercury encounter took place on March 29, 1974, at a range of 703 kilometers (437 mi), passing on the shadow side.

The first seaplane

The first seaplane took off from water at Martinques, France. The pilot was Henri Fabre. The first autonomous flight by a hydroplane was made by the French engineer Henri Fabre on March 28, 1910. A seaplane is a powered fixed-wing aircraft capable of taking off  and landing (alighting) on water. Seaplanes that can also take off and land on airfields are a subclass called amphibian aircraft.