Wikipedia:Selected anniversaries/February 23

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This is a list of selected February 23 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
National Day in Brunei (1984); refimprove section
Mashramani in Guyana refimprove
Defender of the Fatherland Day in Russia and several other former Soviet republics refimprove section
1820 – British authorities arrested the conspirators of the Cato Street Conspiracy, an attempt to murder Prime Minister Lord Liverpool and all the British cabinet ministers. refimprove
1836Battle of the Alamo Save for March 6
1861President-elect of the United States Abraham Lincoln arrived secretly in Washington, D.C., for his inauguration, thwarting an alleged assassination plot in Baltimore. refimprove section
1885Sino-French War: France gained an important victory in the Battle of Đồng Đăng in the Tonkin region of what is now Vietnam. unreferenced section
1903 – As part of a lease agreement with Cuba, the United States assumed control of part of Guantánamo Bay to operate coaling and naval stations, including Guantanamo Bay Naval Base. both refimprove
1909 – The Silver Dart took off from the ice of Bras d'Or Lake on Cape Breton Island in the first controlled powered flight in Canada. a few {cn} + an {unreliable source inline} tags
1927 – German theoretical physicist Werner Heisenberg wrote a letter to fellow physicist Wolfgang Pauli in which he described his uncertainty principle for the first time. refimprove section
1947 – The International Organization for Standardization, responsible for worldwide industrial and commercial standards, was founded. primary sources
1991 – The government of Thai prime minister Chatichai Choonhavan was deposed in a bloodless coup by General Sunthorn Kongsompong. refimprove
2005 – France passed a law requiring lycée teachers to teach students "the positive role" of French colonialism, creating so much public opposition that it was repealed within a year. unreferenced section
2007 – A Virgin express train derailed near Grayrigg in North West England, killing one person and seriously injuring thirty others. refimprove
2014 – Ukrainian president Viktor Yanukovych left to Russia, marking the end of the Euromaidan protests and the start of the Crimean crisis. multiple issues

Eligible

February 23: The Emperor's Birthday in Japan (1960)

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