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 -
Sam Houston -
Brasilia
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The Red Baron -
Maharlika (ruling class) of the Kingdom of Tondo -
Henry VIII of England
Ineligible
| Blurb | Why ineligible |
|---|---|
| 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. | refimprove |
| 1836 – Texan forces led by Sam Houston defeated General Antonio López de Santa Anna and his Mexican troops in the Battle of San Jacinto near La Porte, the decisive battle in the Texas Revolution. | refimprove |
| 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 |
| 1967 – Colonel Georgios Papadopoulos overthrew the government of Prime Minister Panagiotis Kanellopoulos in a coup d'état, establishing the Regime of the Colonels in Greece. | refimprove |
| 1970 – In response to a long-running dispute over wheat production quotas, the Principality of Hutt River proclaimed their secession from Western Australia. | lots of {{cn}} tags |
Eligible
- 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 World War I with 80 confirmed air combat victories.
- 1922 – The first annual Aggie Muster was held as a remembrance for fellow students and alumni of Texas A&M University in College Station, Texas, US who have died in the previous year.
Notes
- Manfred von Richthofen is also featured on Wikipedia:Selected anniversaries/September 17.
April 21: Maundy Thursday (Christianity, 2011); Grounation Day in the Rastafari movement; First day of Ridván in the Bahá'í Faith
- 753 BC – Romulus and Remus founded Rome, according to the calculations by Roman scholar Varro Reatinus.
- 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.
- 1863 – After the Ottoman Empire exiled him from Baghdad, Bahá'u'lláh, the founder of the Bahá'í Faith, began his twelve-day stay in the Garden of Ridván where he declared his mission as "He whom God shall make manifest".
- 1960 – Brasília (Cathedral of Brasilia pictured), a planned city primarily designed by architect and urban planner Lúcio Costa, was officially inaugurated, replacing Rio de Janeiro as the capital of Brazil.
- 1975 – Nguyễn Văn Thiệu resigned as President of South Vietnam, and was replaced by Tran Van Huong, as communist forces closed in on victory.