21 September Events

September 21 is the 264th day of the year (265th in leap years) in the Gregorian calendar. There are 101 days remaining until the end of the year. This date is slightly more likely to fall on a Monday, Wednesday or Friday (58 in 400 years each) than on Saturday or Sunday (57), and slightly less likely to occur on a Tuesday or Thursday (56).

Events

455 – Emperor Avitus enters Rome with a Gallic army and consolidates his power.
1170 – Combined English and Irish forces, under the command of Richard de Clare, Earl of Pembroke and Diarmait Mac Murchada, King of Leinster seize Norse-Gaelic Dublin, forcing Ascall mac Ragnaill, King of Dublin into exile.
1217 – Livonian Crusade: The Estonian leader Lembitu and Livonian leader Kaupo the Accursed are killed in Battle of Matthew's Day.
1435 – The Congress of Arras causes Burgundy to switch sides in the Hundred Years' War.
1745 – Battle of Prestonpans: A Hanoverian army under the command of Sir John Cope is defeated, in ten minutes, by the Jacobite forces of Prince Charles Edward Stuart
1776 – Part of New York City is burned shortly after being occupied by British forces.
1780 – American Revolutionary War: Benedict Arnold gives the British the plans to West Point.
1792 – French Revolution: The National Convention declares France a republic and abolishes the absolute monarchy.
1843 – John Williams Wilson takes possession of the Strait of Magellan on behalf of the newly independent Chilean government.
1860 – Second Opium War: An Anglo-French force defeats Chinese troops at the Battle of Palikao.
1896 – Mahdist War: British forces under the command of Horatio Kitchener takes Dongola in the Sudan.
1898 – Empress Dowager Cixi seizes power and ends the Hundred Days' Reform in China.
1921 – A storage silo in Oppau, Germany, explodes, killing 500-600 people.
1933 – Salvador Lutteroth ran the first ever EMLL (now CMLL) show in Mexico, marking the birth of Lucha libre.
1934 – A large typhoon hits western Honshū, Japan, killing more than three thousand people.
1937 – J. R. R. Tolkien's The Hobbit is published.
1938 – The Great Hurricane of 1938 makes landfall on Long Island in New York. The death toll is estimated at 500-700 people.
1939 – Romanian Prime Minister Armand Călinescu is assassinated by far-right legionnaires of the fascist paramilitary organization Iron Guard.
1942 – The Holocaust in Ukraine: On the Jewish holiday of Yom Kippur, Nazis send over 1,000 Jews of Pidhaitsi to Bełżec extermination camp.
1942 – The Holocaust in Poland: At the end of Yom Kippur, Germans order Jews to permanently evacuate Konstantynów and move to the ghetto in Biała Podlaska, established to assemble Jews from seven nearby towns, including Janów Podlaski, Rossosz and Terespol.
1942 – In Dunaivtsi, Ukraine, Nazis murder 2,588 Jews.
1942 – The Boeing B-29 Superfortress makes its maiden flight.
1953 – Lieutenant No Kum-sok, a North Korean pilot, defects to South Korea and is associated with Operation Moolah.
1964 – Malta gains independence from the United Kingdom but remains in the Commonwealth.
1964 – The North American XB-70 Valkyrie, the world's first Mach 3 bomber, makes its maiden flight from Palmdale, California.
1965 – The Gambia, Maldives and Singapore are admitted as members of the United Nations.
1971 – Bahrain, Bhutan and Qatar join the United Nations.
1972 – Philippine President Ferdinand Marcos signs Proclamation № 1081, placing the entire country under martial law and marking the beginning of his authoritarian rule.
1976 – Orlando Letelier is assassinated in Washington, D.C. He is a member of the Chilean socialist government of Salvador Allende, overthrown in 1973 by Augusto Pinochet.
1976 – Seychelles joins the United Nations.
1981 – Belize is granted full independence from the United Kingdom.
1981 – Sandra Day O'Connor is unanimously approved by the U.S. Senate as the first female Supreme Court justice.
1984 – Brunei joins the United Nations.
1991 – Armenia gains independence from the Soviet Union.
1993 – Russian President Boris Yeltsin suspends parliament and scraps the then-functioning constitution, thus triggering the Russian constitutional crisis of 1993.
1996 – The Defense of Marriage Act passes the United States Congress (a vote of 342-67 in the House of Representatives and a vote of 85-14 in the Senate). The law prohibited federal recognition of same-sex marriage, while allowing states to adopt any marital definition of their choosing.
1999 – Chi-Chi earthquake occurs in central Taiwan, leaving about 2,400 people dead.
2001 – America: A Tribute to Heroes is broadcast by over 35 network and cable channels, raising over $200 million for the victims of the September 11 attacks.
2001 – Increased racial tensions in Peterborough, England following the September 11 attacks result in the murder of Ross Parker by a gang of ten Muslims in a racially motivated attack.
2003 – The Galileo Probe is terminated by sending it into Jupiter.
2013 – Al-Shabaab Islamic militants attack the Westgate shopping mall in Nairobi, Kenya, killing at least 67 people.

Holidays and observances

Autumnal equinox observances in the Northern Hemisphere, vernal equinox observances in the Southern Hemisphere (see September 22):
Arbor Day (Brazil)
Spring Day (Argentina)
Student's Day (Bolivia)
Christian feast day:
Laurent-Joseph-Marius Imbert (one of the Korean Martyrs)
Matthew the Evangelist (Western Church)
Nativity of the Theotokos (Orthodox Church, Julian calendar)
September 21 (Eastern Orthodox liturgics)
Customs Service Day (Poland)
Founder's Day and National Volunteer Day (Ghana)
Independence Day, celebrates the independence of Armenia from the Soviet Union in 1991.
Independence Day, celebrates the independence of Belize from the United Kingdom in 1981.
Independence Day, celebrates the independence of Malta from the United Kingdom in 1964.
International Day of Peace (International)
Victory over the Golden Horde in the Battle of Kulikovo (Russia)

Source: wikipedia