Wikipedia:Selected anniversaries/September 20

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This is a list of selected September 20 anniversaries that appears on 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 soon will 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 5–6 events are posted at a time and thus not everything that is "most important and significant" can be listed. In addition, an event is not generally posted this year if it is also the subject of the scheduled September 20, 2018 featured article or the September 20, 2018 featured picture.

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 >

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Blurb Reason
Prinsjesdag in Netherlands (2011); refimprove
Feast day of the Korean Martyrs (Roman Catholic Church) multiple issues
1378Papal 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. refimprove section, unreferenced section
1596 – An expedition of twelve families led by Diego de Montemayor founded Monterrey in New Spain. Tagged for cleanup, expansion
1697 – The Treaty of Ryswick was signed between France and the Grand Alliance, ending the Nine Years' War. refimprove section
1848 – The American Association for the Advancement of Science, publisher of the journal Science, was founded. refimprove section, external links
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
1946 – The first Cannes Film Festival was held in Cannes, France, after a seven-year delay due to World War II. refimprove section
1979Jean-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. outdated


September 20: Day of Ashura (Islam, 2018)

Great Buddha, Kamakura, Japan
Great Buddha, Kamakura, Japan

John Patteson (d. 1871) · Éva Gauthier (b. 1885) · Rose Francine Rogombé (b. 1942)

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