Wikipedia:Selected anniversaries/April 13

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This is a list of selected April 13 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. Before doing so, please review the selected anniversaries guidelines. If your suggestion is potentially controversial or relates to a day currently or soon to appear on the Main Page, post it on the talk page instead.

Please note:

  • Events listed on the Main Page are selected based on article quality and to provide a diverse range of topics, rather than solely on the importance or significance of the events.
  • Only four or five events are featured each day; therefore, not all important or significant events can be included.
  • An event is generally excluded if it is already the subject of the scheduled featured article or picture of the day.

To report an error in content currently on the Main Page, see Wikipedia:Main Page/Errors. If a listed event is inaccurate, please first seek consensus and update the corresponding article before making changes here.

April 12 April 14
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Images

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Ineligible

Blurb Reason
Thingyan begins in Myanmar; refimprove
Cambodian New Year; refimprove
Lao New Year in Laos; refimprove
; Thai New Year's Day refimprove section
1111Henry V, the last ruler of the Salian dynasty, was crowned Holy Roman Emperor. page numbers needed
1873 – In the wake of a disputed election for local offices in Colfax, Louisiana, U.S., armed white supremacists overpowered freedmen and the African American state militia trying to control the parish courthouse, killing over 100 of them. multiple issues
1919 – The Provisional Government of the Republic of Korea, a government in exile based in Shanghai during the Japanese occupation of Korea, was formed. unreferenced section, self-reference
1919British Indian Army troops massacred hundreds of unarmed men, women and children who were attending a peaceful gathering at the Jallianwala Bagh in Amritsar, Punjab, India. trivial popular culture listings
1941 – The Soviet Union and the Empire of Japan signed a neutrality pact, which lasted through most of World War II. refimprove section
1943World War II: German news announced the discovery of a mass grave in Katyn, Russia, of Polish prisoners of war killed by Soviet forces, causing a diplomatic rift between the Polish government-in-exile and the USSR. expansion
1945World War II: Soviet and Bulgarian forces captured Vienna in Austria. refimprove section
1953 – The CIA began Project MKUltra, an illegal, covert human research program into mind control. refimprove section
1984Kashmir conflict: Indian forces launched a pre-emptive attack on the disputed Siachen Glacier region of Kashmir, triggering a military conflict with Pakistan. a bunch of inline tags (page/full citation needed)
2015 – Czech politician Vít Jedlička proclaimed the micronation Liberland on a patch of land between Croatia and Serbia that had been unclaimed by either side due to a territorial dispute. refimprove section, outdated * 1948Civil war in Mandatory Palestine: A convoy bringing supplies and personnel to Jerusalem's Hadassah Hospital was ambushed by Arab forces, leaving 79 people dead. tagged for primary sources

Eligible

Notes

  • Henry V of England appears on April 9, so to avoid confusion, Henry V HRE should not appear in the same year.
  • Serse appears on April 15 so the Messiah blurb should not appear in the same year.

April 13: Night of Decree (Shia Islam, 2023)

Jefferson Memorial
Jefferson Memorial
More anniversaries: