18 April Events

April 18 is the 108th day of the year (109th in leap years) in the Gregorian calendar. There are 257 days remaining until the end of the year. This date is slightly more likely to fall on a Monday, Wednesday or Saturday (58 in 400 years each) than on Thursday or Friday (57), and slightly less likely to occur on a Tuesday or Sunday (56).

Events

796 – King Æthelred I of Northumbria is murdered in Corbridge by a group led by his ealdormen, Ealdred and Wada. The patrician Osbald is crowned, but abdicates within 27 days.
1025 – Bolesław Chrobry is crowned in Gniezno, becoming the first King of Poland.
1506 – The cornerstone of the current St. Peter's Basilica is laid.
1518 – Bona Sforza is crowned as queen consort of Poland.
1521 – Trial of Martin Luther begins its second day during the assembly of the Diet of Worms. He refuses to recant his teachings despite the risk of excommunication.
1689 – Bostonians rise up in rebellion against Sir Edmund Andros.
1738 – Real Academia de la Historia ("Royal Academy of History") is founded in Madrid.
1775 – American Revolution: The British advancement by sea begins; Paul Revere and other riders warn the countryside of the troop movements.
1831 – The University of Alabama is founded in Tuscaloosa, Alabama.
1847 – American victory at the battle of Cerro Gordo opens the way for invasion of Mexico.
1857 – "The Spirits Book" by Allan Kardec is published, marking the birth of Spiritualism in France.
1864 – Battle of Dybbøl: A Prussian-Austrian army defeats Denmark and gains control of Schleswig. Denmark surrenders the province in the following peace settlement.
1897 – The Greco-Turkish War is declared between Greece and the Ottoman Empire.
1899 – The St. Andrew's Ambulance Association is granted a Royal Charter by Queen Victoria.
1902 – The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
1906 – An earthquake and fire destroy much of San Francisco, California.
1909 – Joan of Arc is beatified in Rome.
1912 – The Cunard liner RMS Carpathia brings 705 survivors from the RMS Titanic to New York City.
1915 – French pilot Roland Garros is shot down and glides to a landing on the German side of the lines during World War I.
1923 – Yankee Stadium: "The House that Ruth Built" opens.
1942 – World War II: The Doolittle Raid on Japan: Tokyo, Yokohama, Kobe and Nagoya are bombed.
1942 – Pierre Laval becomes Prime Minister of Vichy France.
1943 – World War II: Operation Vengeance, Admiral Isoroku Yamamoto is killed when his aircraft is shot down by U.S. fighters over Bougainville Island.
1945 – Over 1,000 bombers attack the small island of Heligoland, Germany.
1946 – The International Court of Justice holds its inaugural meeting in The Hague, Netherlands.
1949 – Ireland leaves the British Commonwealth and becomes the Republic of Ireland.
1949 – The keel for the aircraft carrier USS United States is laid down at Newport News Drydock and Shipbuilding. However, construction is canceled five days later, resulting in the Revolt of the Admirals.
1954 – Gamal Abdel Nasser seizes power in Egypt.
1955 – Twenty-nine nations meet at Bandung, Indonesia, for the first Asian-African Conference.
1980 – The Republic of Zimbabwe (formerly Rhodesia) comes into being, with Canaan Banana as the country's first President. The Zimbabwean dollar replaces the Rhodesian dollar as the official currency.
1983 – A suicide bomber in Lebanon destroys the United States embassy in Beirut, killing 63 people.
1988 – The United States launches Operation Praying Mantis against Iranian naval forces in the largest naval battle since World War II.
1992 – General Abdul Rashid Dostum revolts against President Mohammad Najibullah of the Democratic Republic of Afghanistan and allies with Ahmad Shah Massoud to capture Kabul.
1996 – In Lebanon, at least 106 civilians are killed when the Israel Defense Forces shell the United Nations compound at Quana where more than 800 civilians had taken refuge.
2007 – A series of bombings, two of them being suicides, occur in Baghdad, killing 198 and injuring 251.
2013 – A suicide bombing in a Baghdad cafe kills 27 people and injures another 65.

Holidays and observances

Christian feast day:
Corebus
Cyril VI of Constantinople (Eastern Orthodox Church)
Eleutherius and Antia
Galdino della Sala
Molaise of Leighlin
Perfectus
Plato of Sakkoudion
April 18 (Eastern Orthodox liturgics)
Anniversary of the Victory over the Teutonic Knights in the Battle of the Ice, 1242 (Russia)
Army Day (Iran)
Coma Patients' Day (Poland)
Friend's Day (Brazil)
Independence Day, celebrates the independence of Zimbabwe from the United Kingdom in 1980.
International Day For Monuments and Sites
Invention Day (Japan)
Victory over the Teutonic Knights in the Battle of the Ice (Russia)

Source: wikipedia