Wikipedia:Selected anniversaries/April 22
This is a list of 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. 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.
Images
Use only ONE image at a time
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A 1864 two-cent American coin with the words "In God We Trust"
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The Oklahoma Land Run of 1889 -
Mosaic "spinning" logo
Ineligible
| Blurb | Why ineligible |
|---|---|
| 1911 – Tsinghua University, one of the leading universities in mainland China, was founded, funded by an unexpected surplus in indemnities paid by the Qing Dynasty to the United States as a result of the Boxer Rebellion. | tagged {{advertisement}} |
| 1912 – The Bolshevik newspaper Pravda was first published in Saint Petersburg, Russia. | refimprove |
| 1993 – The first version of Mosaic ("spinning" logo pictured), 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 World Wide Web browser and Gopher client. | tagged for 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 |
Eligible
- 1529 – Spain and Portugal signed the Treaty of Zaragoza, defining the areas of their respective influence in Asia.
- 1889 – Over 50,000 people rushed to claim a piece of the available two million acres (8,000 km2) in the Unassigned Lands, the present-day U.S. state of Oklahoma, entirely founding the brand-new Oklahoma City.
- 1930 – France, Italy, Japan, the United Kingdom, and the United States signed the London Naval Treaty, regulating submarine warfare and limiting military ship building.
- 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 Ustaše regime.
- 1948 – Civil War in Mandatory Palestine: The Jewish paramilitary group Haganah captured Haifa from the Arab Liberation Army.
- 1954 – Red Scare: Live television coverage of the Army–McCarthy hearings began, which is widely believed to have contributed to the decline of United States Senator Joseph McCarthy.
- 1998 – Disney'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.
April 22: Good Friday (Christianity, 2011); Earth Day
- 1500 – Portuguese explorer Pedro Álvares Cabral (pictured) and his crew became the first Europeans to sight Brazil when they spotted Monte Pascoal.
- 1864 – The U.S. Congress passed the Coinage Act, authorizing the minting of a two-cent coin, the first U.S. coin to bear the phrase "In God We Trust".
- 1915 – The Germans released chlorine gas as a chemical weapon in the Second Battle of Ypres, killing over 5,000 soldiers within ten minutes by asphyxiation in the first large-scale successful use of poison gas in World War I.
- 1951 – Korean War: The People's Volunteer Army of China attacked positions occupied mainly by Australian and Canadian forces, starting the Battle of Kapyong.
- 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.