Wikipedia:Selected anniversaries/April 20
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.
Images
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Pierre Trudeau -
Claude Bernard -
Louis Pasteur (requires undeletion)
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Louis Pasteur -
René Caillié -
Portrait of Oliver Cromwell by Samuel Cooper -
Vädersolstavlan, attributed to Urban målare -
Red Army Faction logo, showing a Heckler & Koch MP5 submachine gun on top of a red star, overlaid with the letters "RAF" -
Billie Holiday -
Pope Leo XIII -
title=Enoch Powell in 1987 -
Danica Patrick4
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Ineligible
| Blurb | Reason |
|---|---|
| 1303 – Pope Boniface VIII issued a bull establishing what is now Sapienza University of Rome, today one of the largest universities in Europe. | refimprove section |
| 1653 – Oliver Cromwell dissolved the Rump Parliament of the Commonwealth of England by force, eventually replacing it with the Barebone's Parliament. | refimprove section |
| 1792 – After Foreign Minister Charles François Dumouriez presented the French Legislative Assembly with a long list of grievances against Austria, France declared war to begin the French Revolutionary Wars. | refimprove section |
| 1862 – French chemist Louis Pasteur and physiologist Claude Bernard completed the first test on pasteurization. | date not in article; Pasteur listed on Sept 28 (death date); fact not in Bernard article |
| 1884 – Pope Leo XIII published the encyclical Humanum genus, denouncing Freemasonry as well as a number of beliefs and practices purportedly associated with it such as popular sovereignty and the separation of church and state. | lots of assorted inline maintenance tags |
| 1908 – The inaugural season of the New South Wales Rugby League premiership began with nine teams competing in Australia's first Rugby league football competition. | Season: refimprove section; NSWRL: refimprove |
| 1912 – Fenway Park in Boston, Massachusetts, and Tiger Stadium in Detroit, Michigan, were opened. | Fenway: refimprove section |
| 1998 – The violent German revolutionary group known as the Red Army Faction announced that it had dissolved. | refimprove section |
Eligible
- 1535 – Sun dogs were observed over Stockholm, Sweden, inspiring the painting Vädersolstavlan, the oldest colour depiction of the city.
- 1657 – Anglo-Spanish War: An English fleet sank much of a Spanish treasure fleet at Santa Cruz de Tenerife in the Canary Islands but was unable to capture the treasure.
- 1809 – War of the Fifth Coalition: Commanded by Napoleon, Franco-German forces defeated a reinforced Austrian corps at the Battle of Abensberg.
- 1828 – French explorer René Caillié became the first European to enter Timbuktu and return safely, for which he received a 10,000-franc prize from the Société de Géographie.
- 1939 – Adolf Hitler's 50th birthday was celebrated as a national holiday in Nazi Germany.
- 1939 – Billie Holiday recorded the song "Strange Fruit", which later became an emblem of the civil rights movement.
- 1968 – British member of Parliamen Enoch Powell made his controversial "Rivers of Blood" speech in opposition to immigration and anti-discrimination legislation, resulting in his removal from the Shadow Cabinet.
- 1968 – Pierre Trudeau was sworn in as prime minister of Canada, succeeding Lester B. Pearson.
- 1999 – Students Eric Harris and Dylan Klebold embarked on a massacre, killing 13 people and wounding more than 20 others before committing suicide at Columbine High School in Columbine, Colorado.
- 2008 – American racing driver Danica Patrick won the Indy Japan 300, becoming the first woman to win an IndyCar auto race.
- 2010 – An explosion on Deepwater Horizon, an offshore rig in the Gulf of Mexico, resulted in the largest marine oil spill in history.
- Born/died this day: | Cædwalla of Wessex |d|689| Peter Bartholomew|d|1099| Elizabeth Barton|d|1534| Allegra Byron|d|1822| John Abernethy|d|1831| Paul Poiret|b|1879| Dave Bancroft|b|1891| Frances Ames|b|1920| Elmer Gedeon|d|1944| Nina Davuluri|b|1989
April 20: First day of Ridván (Baháʼí Faith, 2021); 420 (cannabis culture)
- 1537 – Bacatá, the main settlement of the Muisca Confederation in present-day Colombia, was conquered by Spanish conquistadors led by Gonzalo Jiménez de Quesada.
- 1818 – Four days after the Court of King's Bench upheld an English murder suspect's right to a trial by battle in Ashford v Thornton, the plaintiff declined to fight, allowing the defendant to go free.
- 1914 – A fire and a gun battle between the Colorado National Guard and striking coal miners led to 17 deaths in the Ludlow Massacre.
- 1978 – Korean Air Lines Flight 902 was shot down after violating Soviet airspace, forcing it to make an emergency landing.
- 2008 – Fernando Lugo (pictured) became the first non–Colorado Party candidate to be elected President of Paraguay in 61 years.
- William Bedloe (b. 1650)
- David Brainerd (b. 1718)
- Vjekoslav Luburić (d. 1969)