Wikipedia:Selected anniversaries/September 20

This is a list of selected September 20 anniversaries that appear in the "On this day" section of the Main Page. To suggest a new item, in most cases, you can be bold and edit this page. Please read the selected anniversaries guidelines before making your edit. However, if your addition might be controversial or on a day that is or will soon be on the Main Page, please post your suggestion on the talk page instead.

Please note that the events listed on the Main Page are chosen based more on relative article quality and to maintain a mix of topics, not based solely on how important or significant their subjects are. Only four to five events are posted at a time and thus not everything that is "most important and significant" can be listed. In addition, an event is generally not posted this year if it is also the subject of the scheduled featured article, featured list or picture of the day.

To report an error when this appears on the Main Page, see Main Page errors. Please remember that this list defers to the supporting articles, so it is best to achieve consensus and make any necessary changes there first.

← September 19	September 21 →

Staging area

Images

Use only ONE image at a time

• 
  Bobby Riggs
• 
  Battle of Alma
• 
  Battle of Alma
• 
  Pope Urban VI
• 
  RMS Mauretania
• 
  title=RMS Mauretania
• 
  Billie Jean King and Bobby Riggs
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  Great Buddha of Kamakura

Ineligible

Blurb	Reason
Prinsjesdag in the Netherlands (2011);	refimprove
Feast day of the Korean Martyrs (Roman Catholic Church)	multiple issues
1378 – Papal Schism: Unhappy with Pope Urban VI, a group of cardinals started a rival papacy with the election of Antipope Clement VII, throwing the Roman Catholic Church into turmoil.	unreferenced section
1596 – An expedition of twelve families led by Diego de Montemayor founded Monterrey in New Spain.	Texpansion
1848 – The American Association for the Advancement of Science, publisher of the journal Science, was founded.	refimprove section
1854 – The Crimean War began with a Franco-British victory over Russian forces at the Battle of the Alma near the River Alma in Crimea.	refimprove
1870 – The Bersaglieri entered Rome through the Porta Pia, ending the temporal power of the Pope and completing the unification of Italy.	refimprove section
1906 – The ocean liner RMS Mauretania, the largest and fastest ship in the world at the time, was launched in Tyneside, England.	{{cn}} x 15 as of 19-9-21
1946 – The first Cannes Film Festival was held in Cannes, France, after a seven-year delay due to World War II.	refimprove section
1979 – Jean-Bédel Bokassa, ruler of the Central African Republic, was ousted in a coup d'état backed by the French government.	refimprove section, unreferenced section
2001 – During a televised address to a joint session of the United States Congress, U.S. president George W. Bush declared a "war on terror" against Al-Qaeda and other global terrorist groups.	multiple issues

Eligible

• 1260 – The second of two major uprisings by the Old Prussians, a Baltic tribe, began against the Teutonic Knights.
• 1498 – A tsunami caused by the Nankai earthquake washed away the building housing the statue of the Great Buddha at Kōtoku-in in Kamakura, Japan.
• 1643 – First English Civil War: The First Battle of Newbury was fought in Berkshire; Parliamentarian forces were allowed to pass Royalist troops to retreat the next morning.
• 1697 – The first of a series of treaties comprising the Peace of Ryswick was signed between France and the Grand Alliance, ending the Nine Years' War.
• 1920 – Irish War of Independence: British police officers known as Black and Tans went on a rampage in Balbriggan as revenge for the shooting of two officers.
• 1943 – World War II: Australian troops defeated Imperial Japanese forces at the Battle of Kaiapit in New Guinea.
• 1944 – Second World War: Allied forces captured San Marino from the German Army.
• 1967 – Scientology founder L. Ron Hubbard announced the story of Xenu in a taped lecture sent to all Scientologists.
• 1973 – Billie Jean King defeated Bobby Riggs in straight sets at the Astrodome in Houston, Texas, in an internationally televised tennis match dubbed the "Battle of the Sexes".
• 1984 – The Cosby Show, which became one of three U.S. television shows to have the highest ratings five years in a row, premiered with its pilot episode.
• 2000 – The Real Irish Republican Army carried out a rocket-launcher attack on the MI6 headquarters in London, with no casualties and minimal damage recorded.
• 2008 – An explosive-laden truck detonated in front of the Marriott hotel in Islamabad, Pakistan, killing 54 people and injuring 266 others.
• Born/died this day: | Gozbald |d|855| Herbert Putnam |b|1861| Jacob Grimm |d|1863| Enrico Mizzi |b|1885| Éva Gauthier |b|1885| Edith Rogers |b|1894| Dennis Viollet |b|1933| Rose Francine Rogombé |b|1942

Notes

• Harald III is featured on September 25, so Battle of Fulford should not appear in the same year.

September 20

Satellite image of Hurricane Irene

• 1066 – Harald III of Norway and his English ally Tostig Godwinson defeated the northern earls Edwin and Morcar at the Battle of Fulford near York.
• 1792 – The French Army achieved its first major victory in the War of the First Coalition at the Battle of Valmy.
• 1971 – Hurricane Irene (satellite image pictured) moved into the Pacific Ocean from the Atlantic, making it the first actively tracked tropical cyclone to do so.
• 1977 – A series of celestial phenomena of disputed nature was observed in the western Soviet Union, Finland and Denmark.
• 2011 – The United States military ended its "don't ask, don't tell" policy, consequently allowing gay and lesbian people to serve openly.

• Maurice Benyovszky (b. 1746)
• John Patteson (d. 1871)
• Erich Hartmann (d. 1993)

More anniversaries:

• September 19
• September 20
• September 21