Wikipedia:Selected anniversaries/March 21

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This is a list of selected March 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. Before doing so, please review the selected anniversaries guidelines. If your suggestion is potentially controversial or relates to a day currently or soon to appear on the Main Page, post it on the talk page instead.

Please note:

  • Events listed on the Main Page are selected based on article quality and to provide a diverse range of topics, rather than solely on the importance or significance of the events.
  • Only four or five events are featured each day; therefore, not all important or significant events can be included.
  • An event is generally excluded if it is already the subject of the scheduled featured article or picture of the day.

To report an error in content currently on the Main Page, see Wikipedia:Main Page/Errors. If a listed event is inaccurate, please first seek consensus and update the corresponding article before making changes here.

March 20 March 22
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Ineligible

Blurb Reason
Benito Juárez Day in Mexico; unreferenced section (Ancestry), refimprove section
World Poetry Day stub
World Down Syndrome Day needs more footnotes and cleanup
; Mother's Day in the Arab world refimprove sections
Independence Day in Namibia (1990); outdated
630Byzantine emperor Heraclius restored the True Cross to Jerusalem. lots of CN tags (6) and a lot of other sentences that should be so tagged
1800 – After being elected as a compromise candidate after several months of stalemate, Pope Pius VII was crowned in Venice with a temporary papal tiara made of papier-mâché. refimprove
1801French Revolutionary Wars: The Battle of Alexandria was fought between British and French forces near the ruins of Nicopolis in Egypt. refimprove section
1804 – The Napoleonic Code, the French civil code established under Napoleon, entered into force, eventually strongly influencing the law of many other countries. unreferenced section, refimprove sections
1871Otto von Bismarck, the founder of the German Empire, was proclaimed as its first chancellor. lots of CN tags (11), especially in one section
1937Pope Pius XII's encyclical Mit brennender Sorge, condemning antisemitism and criticizing Nazism, was read from the pulpits of all Catholic churches in Germany. Too many block quotes
1943World War II: Wehrmacht officer Rudolf-Christoph von Gersdorff attempted to assassinate Adolf Hitler by suicide bombing, but had to abort the plan at the last minute. needs more footnotes
1945World War II: Bulgaria and the Soviet Union successfully defended the north bank of the Drava River as the Battle of the Transdanubian Hills concluded. refimprove section
1983 – In the West Bank, a number of Palestinian girls complained of breathing difficulties due to strange odors, leading to accusations of poison gas. refimprove section
1989 – An article in Sports Illustrated alleged that Pete Rose, the manager of the Major League Baseball team Cincinnati Reds, was involved in gambling. unreferenced sections
2006 – A man smashed the statue of Phra Phrom at the Erawan Shrine in Bangkok, Thailand, with a hammer, and was subsequently beaten to death by bystanders. Tagged for referencing
2006 – The first message on the social media site Twitter was sent by Jack Dorsey. Multiple banner issues

Eligible

March 21: Oltenia Day in Romania

More anniversaries: