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Wikipedia:Selected anniversaries/April 20

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This is an old revision of this page, as edited by Holly Cheng (talk | contribs) at 16:12, 20 April 2016 (restore René Caillié with rewrite). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

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This is a list of selected April 20 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.

April 19 April 21
Staging area

Images

Ineligible

Blurb Reason
1303Pope Boniface VIII issued a bull establishing what is now Sapienza University of Rome, today one of the largest universities in Europe. refimprove section
1653Oliver Cromwell dissolved the Rump Parliament of the Commonwealth of England by force, eventually replacing it with the Barebone's Parliament. refimprove section
1836 – The US Congress passed an act creating the Wisconsin Territory. unreferenced section
1862 – French chemist Louis Pasteur and physiologist Claude Bernard completed the first test on pasteurization. need to verify date
1908The inaugural season of the New South Wales Rugby League premiership began with nine teams competing in Australia's first Rugby league football competition. needs more footnotes
1912Fenway Park in Boston, Massachusetts, and Tiger Stadium in Detroit, Michigan, were opened. Tiger Stadium: unreferenced section
1939Billie Holiday recorded her version of "Strange Fruit", which gained fame as an emblem of the Civil Rights Movement. refimprove section
1999 – Students Eric Harris and Dylan Klebold embarked on a massacre, killing 13 people and wounding over 20 others before committing suicide at Columbine High School in Columbine, Colorado. refimprove section
2008 – American Danica Patrick won the Indy Japan 300, becoming the first woman to win an IndyCar auto race. refimprove section
2010An explosion on Deepwater Horizon, an offshore oil rig in the Gulf of Mexico, caused the largest accidental marine oil spill in the history of the petroleum industry. POTD for 2016

Eligible

April 20: Ridván begins at sunset (Bahá'í Faith); 4/20 (cannabis culture)

Pope Leo XIII
Pope Leo XIII
More anniversaries: