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Wikipedia:Selected anniversaries/September 21

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This is a list of selected September 21 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 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.

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Ineligible

Blurb Reason
Oktoberfest begins (2012); refimprove section
Independence Day in Armenia (1991), Belize (1981) and Malta (1964) Armenia: refimprove section; Belize: outdated; Malta: refimprove section
454 – Roman emperor Valentinian III killed Aetius in Ravenna. unreferenced section
1823 – According to Joseph Smith, he was first visited by the Angel Moroni, who would guide him to the golden plates that became the basis of the Book of Mormon. Tagged for WP:OR
1860Second Opium War: Anglo-French forces earned a decisive victory against Qing dynasty troops in the Battle of Palikao, allowing them to capture Beijing. lots of CN tags (5)
1898 – The Hundred Days' Reform in China was abruptly terminated when Empress Dowager Cixi forced the reform-minded Guangxu Emperor into seclusion and took over the government as regent. needs more footnotes
1921 – A tower silo storing 4,500 tonnes of a mixture of ammonium sulfate and ammonium nitrate fertilizer exploded at a BASF plant in Oppau, Germany, killing at least 500 people. refimprove
1939 – Romanian prime minister Armand Călinescu was assassinated in Bucharest by pro-Nazi members of the Iron Guard. incomplete citations
1942 – The prototype model of the Boeing B-29 Superfortress, a four-engine heavy bomber that became one of the largest aircraft to see service during World War II, flew for the first time. refimprove section
1953 – North Korean No Kum-sok defected with his MiG-15, inadvertently making Operation Moolah, an American effort to bribe communist pilots, a success. unreferenced section
1976 – Chilean political figure Orlando Letelier was assassinated in Washington, D.C., by DINA agents. refimprove section
2005Hurricane Rita, the most intense tropical cyclone ever observed in the Gulf of Mexico, achieved Category 5 status, and left up to 125 dead over the following days. refimprove section
Leonello d'Este |b|1407 Many uncited passages
Faith Hill |b|1967 refimprove section
Virgil |d|19 BC| Many uncited passages
Arthur Schopenhauer |d|1860| Many uncited passages

Eligible

September 21: International Day of Peace

The Great Fire of New York
The Great Fire of New York
More anniversaries: