Wikipedia:Selected anniversaries/April 21
This is a list of selected April 21 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, featured list 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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Romulus and Remus -
Sam Houston -
Cathedral of Brasilia -
Nguyễn Văn Thiệu (requires undeletion)
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Maharlika (ruling class) of the Kingdom of Tondo -
Manfred von Richthofen -
Mausoleum of four Shia Imams -
Henry VIII of England -
Reception to Washington on April 21, 1789, at Trenton by N. C. Wyeth -
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Ineligible
| Blurb | Reason |
|---|---|
| Tiradentes Day in Brazil | multiple issues |
| 753 BC – Romulus and Remus legendarily founded Rome, according to the calculations by Roman scholar Varro Reatinus. | lots of CN tags in one section |
| 1782 – A city pillar was erected on Rattanakosin Island, located on the eastern bank of the Chao Phraya River, an act considered the founding of the city of Bangkok. | refimprove section |
| 1789 – The Ladies of Trenton social club hosted a reception for president-elect George Washinton as he journeyed to New York City for his first inauguration. | on DYK on 2020-02-22 |
| 1894 – Norway formally adopted the Krag–Jørgensen, a repeating bolt action rifle designed by the Norwegians Ole Herman Johannes Krag and Erik Jørgensen, as the main firearm of its armed forces. | needs more footnotes, unreferenced section |
| 1918 – Manfred von Richthofen, known as the "Red Baron", was shot down and killed near Vaux-sur-Somme in France, after a career as the most successful fighter pilot of First World War with 80 confirmed air combat victories. | refimprove section |
| 1960 – Brasília, a planned city primarily designed by architect and urban planner Lúcio Costa, was officially inaugurated, replacing Rio de Janeiro as the capital of Brazil. | unreferenced section |
| 1967 – Colonel Georgios Papadopoulos overthrew the government of Greek Prime Minister Panagiotis Kanellopoulos, establishing the Regime of the Colonels. | refimprove sections |
| 1975 – Nguyễn Văn Thiệu resigned as President of South Vietnam, and was replaced by Trần Văn Hương, as communist forces closed in on victory. | refimprove section |
| 2002 – In the first round of the French presidential election, Jean-Marie Le Pen progressed to the runoff, a result so surprising that "21st of April" is now a common expression in France. | Election: refimprove section, fact not in article; Le Pen: lots of CN tags (8) |
| 2014 – The city of Flint, Michigan, U.S., changed its water source to the Flint River, which exposed residents to lead poisoning. | multiple issues |
Eligible
- 43 BC – Forces led by Mark Antony fought the Battle of Mutina against those of Decimus Brutus, one of Julius Caesar's assassins.
- 900 – A debt was pardoned by the Datu of Tondo on the island of Luzon, as inscribed on the Laguna Copperplate Inscription, the earliest known written document found in the Philippines.
- 1509 – Henry VIII became King of England, following the death of his father Henry VII, eventually becoming a significant figure in the history of the English monarchy.
- 1615 – The Wignacourt Aqueduct in Malta was inaugurated and was used to carry water to Valletta for about 300 years.
- 1863 – Following his exile from Baghdad, Baháʼu'lláh, the founder of the Baháʼí Faith, began a twelve-day stay in the Garden of Ridván, where he declared himself to be "He whom God shall make manifest".
- 1914 – Mexican Revolution: The United States detained a German steamer carrying materiel for the Mexican federal government.
- 1925 or 1926 – Al-Baqi cemetery, former site of the mausoleum of four of the Twelve Imams of Shia Islam, was demolished by Wahhabis.
- 1934 – The "Surgeon's Photograph", purportedly showing the Loch Ness Monster (later revealed to be a hoax), was published in the Daily Mail.
- 1962 – The Century 21 Exposition, the first world's fair in the United States since World War II, opened in Seattle.
- Born/died: Bardas (d. 866) | Bajkam (d. 941) | Petrus Apianus (d. 1552) | Jan Boeckhorst (d. 1668) | Max Weber (b. 1864) | Ignatius Zakka I Iwas (b. 1931) | John Maynard Keynes (d. 1946) | Cheryl Gillan (b. 1952) | Dorothy Eady (d. 1981)
April 21: Grounation Day (Rastafari); Yom HaShoah in Israel (2020)
- 1836 – Forces of the Republic of Texas led by Sam Houston (pictured) defeated the Mexican troops of General Antonio López de Santa Anna in the Battle of San Jacinto, the decisive battle in the Texas Revolution.
- 1958 – United Airlines Flight 736 collided with a U.S. Air Force fighter jet over southern Nevada, resulting in the deaths of all 49 people on board both aircraft.
- 1970 – In response to a dispute over wheat production quotas, Leonard Casley declared his 75 km2 (29 sq mi) farm in Western Australia to be an independent country as the Hutt River Province.
- 2010 – Ukraine and Russia signed the Kharkiv Pact, extending the Russian lease on naval facilities in Crimea.
- Anselm of Canterbury (d. 1109)
- Simon de la Loubère (b. 1642)
- Vivian Maier (d. 2009)