Wikipedia:Selected anniversaries/April 22

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This is a list of selected April 22 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 April 22, 2019 featured article or the April 22, 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.

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Blurb Reason
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
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
1945 – About 600 prisoners of the Jasenovac concentration camp in the Independent State of Croatia revolted, but only 80 managed to escape while the other 520 were killed by the Croatian Ustashe regime. unreferenced section, section needs to be rewritten
1969 – The British yachtsman Robin Knox-Johnston won the Sunday Times Golden Globe Race to complete the first solo non-stop circumnavigation of the world. unreferenced section
1993 – The first version of Mosaic, created by computer programmers Marc Andreessen and Eric Bina at the National Center for Supercomputing Applications of the University of Illinois at Urbana–Champaign, was released, becoming the first popular web browser and Gopher client. expand section
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
2000 – In a predawn raid, U.S. Immigration and Naturalization Service agents seized six-year-old Elián González from his relatives' home in Miami, Florida, and returned him to his Cuban father. refimprove section



April 22: Earth Day

The Oklahoma Land Rush of 1889
The Oklahoma Land Rush of 1889

Germaine de Staël (b. 1766) · James Hargreaves (d. 1778) · Wilhelm Cauer (d. 1945)

More anniversaries: