Wikipedia:Selected anniversaries/December 15

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This is a list of selected December 15 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 December 15, 2019 featured article or the December 15, 2019 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.

< December 14 December 16 >

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Blurb Reason
533 – Forces led by Belisarius defeated Gelimer and the Vandals at the Battle of Tricamarum, completing the "Reconquest of North Africa" under Byzantine Emperor Justinian I. refimprove
1025Constantine VIII became sole emperor of the Byzantine Empire, 63 years after being crowned co-emperor. unreferenced section (Ancestry)
1161Emperor Hailing of the Jin dynasty was assassinated in a military camp near the Yangtze River front following Jin losses in the Battle of Caishi. unreferenced section
1167Stephen du Perche, Chancellor of the Kingdom of Sicily, moved the royal court to Messina to prevent a rebellion. refimprove
1256 – The Hashshashin stronghold at Alamut in present-day Iran was captured and destroyed by Hulagu Khan and the Mongols. multiple issues
1964 – The six-month long Great Canadian Flag Debate effectively ended when the Canadian House of Commons voted to replace the de facto national flag of Canada, the Canadian Red Ensign, with an official one designed by historian George Stanley, the Maple Leaf Flag. refimprove section; Flag of Canada already appears on February 15
1965 – The first space rendezvous took place when NASA spacecraft Gemini 6A maneuvered within 30 centimeters (12 inches) of Gemini 7. Gemini 6A: refimprove; Gemini 7: needs more footnotes; Space rendezvous: too technical
1973 – The American Psychiatric Association removed homosexuality from its official list of mental disorders, the DSM-II. refimprove section
1994Netscape Navigator 1.0, the leading web browser in the 1990s, was first released. refimprove, date not cited
1995 – The European Court of Justice handed down the Bosman ruling, allowing footballers in the European Union to freely transfer from one UEFA Federation to another at the end of their contracts. refimprove
2010 – A boat carrying around 90 asylum seekers, mostly from Iraq and Iran, crashed into rocks and sank off the coast of Christmas Island, Australia, killing 48 people. outdated


December 15: Kingdom Day in Aruba, Curaçao, the Netherlands, and Sint Maarten (1954); Zamenhof Day in Esperanto culture

Venera 7 descent vehicle
Venera 7 descent vehicle

Arthur Dehon Little (b. 1863) · Vibert Douglas (b. 1894) · León Febres Cordero (d. 2008)

More anniversaries: