This is a list of
selected that appear in the "On this day" section of the anniversaries April 21 Main Page. To suggest a new item, in most cases, you can and edit this page. be bold Please read the 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 selected anniversaries guidelines before making your edit. talk page instead.
Please note that the events listed on the Main Page are chosen based more on relative their subjects are. Only five to six events are posted at a time and thus not everything that is " article quality and to maintain a mix of topics, not based solely on how important or significant 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.
Use only ONE image at a time
Maharlika (ruling class) of the Kingdom of Tondo
Manfred von Richthofen, "The Red Baron"
Mausoleum of four Shia Imams
Tiradentes Day multiple issues
753 BC – Romulus and Remus legendarily , according to founded Rome the calculations by Roman scholar Varro Reatinus.
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
1802 – Twelve thousand Wahhabis from the first Saudi State the city of invaded Karbala, killed several thousand inhabitants, and sacked the city.
lead needs rewrite
1894 – Norway formally adopted the , a Krag–Jørgensen 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 " ", was shot down and killed near Red Baron Vaux-sur-Somme in France, after a career as the most successful fighter pilot of First World War with 80 confirmed air combat victories.
1960 – , a Brasília planned city primarily designed by architect and urban planner Lúcio Costa, was officially inaugurated, replacing Rio de Janeiro as the capital of Brazil.
1967 – Colonel Georgios Papadopoulos overthrew the government of Greek Prime Minister Panagiotis Kanellopoulos, establishing the .
Regime of the Colonels refimprove sections
1975 – resigned as President of Nguyễn Văn Thiệu South Vietnam, and was replaced by Trần Văn Hương, as communist forces closed in on victory.
2002 – In the first round of the French presidential election, progressed to the runoff, a result so surprising that " Jean-Marie Le Pen 21st of April" is now a common expression in France.
lots of CN tags
2014 – The city of Flint, Michigan, U.S., to the changed its water source Flint River, which exposed residents to lead poisoning.
900 – A debt was pardoned by the Datu of Tondo on the island of Luzon, as inscribed on the , the earliest known written document found in the Philippines. Laguna Copperplate Inscription
1509 – became Henry VIII King of England, following the death of his father , eventually becoming a significant figure in the history of the English monarchy. Henry VII
1836 – Texan forces led by Sam Houston defeated General Antonio López de Santa Anna and his Mexican troops in the near Battle of San Jacinto La Porte, the decisive battle in the Texas Revolution.
1863 – After the Ottoman Empire exiled him from Baghdad, , the founder of the Bahá'u'lláh 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".
1925 or 1926 – Al-Baqi cemetery, former site of the mausoleum of four of the Twelve Imams of Shia Islam, was by demolished Wahhabis.
1962 – The , the first Century 21 Exposition world's fair in the United States since World War II, opened in Seattle.
2010 – Ukraine and Russia signed the to extend the Russian lease on naval facilities in Kharkiv Pact Crimea. Born/died: (d. 941) Bajkam · (d. 1668) Jan Boeckhorst · (b. 1864) Max Weber · (b. 1931) Ignatius Zakka I Iwas · (d. 1946) John Maynard Keynes · (d. 1981) Dorothy Eady
: First day of April 21 ( Ridván Bahá'í Faith, 2019); (Western Christianity, 2019); Easter (Islam, 2019); Mid-Sha'ban in the Grounation Day Rastafari movement
(d. 866) Bardas · (d. 1552) Petrus Apianus · (b. 1952)