Wikipedia:Selected anniversaries/October 9

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This is a list of selected October 9 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
Hangul Day in South Korea (1446); refimprove section
Feast day of Saint John Henry Newman (Catholicism); Lots of uncited material
Independence Day in Uganda (1962); too detailed, needs expansion, outdated
1237James I of Aragon entered Valencia and established the Kingdom of Valencia. refimprove, date not cited
1446 – Scholars in the court of Sejong the Great promulgated the new Korean alphabet, now known as Hangul. refimprove
1514Mary Tudor, sister of Henry VIII of England, became queen consort of France. refimprove
1635Roger Williams was banished from Massachusetts Bay Colony as a religious dissident after he spoke out against punishments for religious offenses and giving away Native American land. date not in article, refimprove section
1701 – The Collegiate School of Connecticut, later renamed Yale University, was chartered in Old Saybrook, Connecticut, U.S. refimprove section
1831Ioannis Kapodistrias, the Greek head of state and the founder of Greek independence, was assassinated in Nafplion. unreferenced section
1845Anglican priest John Henry Newman, who wished to return the Church of England to many Catholic beliefs, was formally received into the Roman Catholic Church. unreferenced section
1874 – The Universal Postal Union, then known as the General Postal Union, was established with the signing of the Treaty of Bern to unify disparate postal services and regulations so that international mail could be exchanged easily. lead too short
1919 – In Major League Baseball, the Cincinnati Reds won the World Series, five games to three, over the Chicago White Sox, whose players were later found to have lost intentionally. refimprove section
1963 – A landslide displaced large amounts of water from the Vajont Dam in northern Italy, causing waves and floods that quickly swept away several villages and killed almost 2,000 people. refimprove
1970 – The Khmer Republic, headed by General Lon Nol and Prince Sisowath Sirik Matak, was proclaimed in Cambodia. refimprove
1983 – South Korean president Chun Doo-hwan survived an assassination attempt in Rangoon, Burma. unreferenced section
2006 – North Korea conducted a nuclear test, reportedly near Kilchu, with an explosive force of less than one kiloton, that was condemned and denounced by many countries and the United Nations Security Council. refimprove section
2016 – Militants attacked a border police post in Myanmar, killing nine people and triggering a period of intense persecution of the Rohingya Muslim minority. refimprove section

Eligible

Notes

October 9: Leif Erikson Day; Thanksgiving in Canada (2023)

Giardia muris, an example of a protozoan
Giardia muris, an example of a protozoan
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