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Wikipedia:Selected anniversaries/April 22

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This is a lists selected April 22 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.

April 21 April 23
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Ineligible

Blurb Reason
Earth Day lots of uncited material
1519 – Spanish conquistador Hernán Cortés established a settlement in Mexico, naming it "Villa Rica de la Vera Cruz" ("Rich village of the True Cross"). unreferenced section
1529 – Spain and Portugal signed the Treaty of Zaragoza, defining the areas of their respective influence in Asia. refimprove section
1876 – The Boston Red Caps defeated the Philadelphia Athletics in the first game of baseball's National League. no article on the event in question, and it isn't the primary focus of the target article
1889 – More than 50,000 American settlers rushed to claim (pictured) a piece of the two million acres (8,000 km2) made available in the Unassigned Lands, founding Oklahoma City. Land Rush of 1889 has substantial uncited material and incomplete citations
1915World War I: German forces released 168 tons of chlorine gas at the beginning of the Second Battle of Ypres, causing thousands of casualties among French troops. lead too short
1930 – France, Italy, Japan, the United Kingdom, and the United States signed the London Naval Treaty, regulating submarine warfare and limiting military ship building. refimprove
1998Disney's Animal Kingdom at the Walt Disney World Resort in Florida opened, covering more than 500 acres (2 km2), making it the largest single Disney theme park in the world. expansion
2000 – In response to the rapid late 1990s growth of telecommunications, the United Kingdom enacted the Big Number Change, modifying the telephone numbering plans in various areas across the country. refimprove
2016 – The multilateral Paris Agreement, on climate-change mitigation, adaptation, and finance, was opened for signature. tagged for {update}
Princess Margaret of Prussia |b|1872 unref'd section
* 1622 – Anglo-Persian forces combined to capture the Portuguese garrison at Hormuz Island in the Persian Gulf. Date not mentioned in article
* 1969 – British yachtsman Robin Knox-Johnston completed the first single-handed non-stop circumnavigation of the world, winning the Sunday Times Golden Globe Race. 10 Citation needed tags

Eligible

Notes

April 22

Pedro Álvares Cabral
Pedro Álvares Cabral
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