Wikipedia:Selected anniversaries/April 13

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. 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.

← April 12	April 14 →

Staging area

Images

Use only ONE image at a time

• 
  Henry IV of France
• Henry IV of France (requires undeletion)
  Henry IV of France (requires undeletion)
• 
  Henry IV of France
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  Polish firefighters searching for victims in the charred remains of the homeless shelter in Kamień Pomorski, Poland
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  Van Cliburn
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  Ba Cụt
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  Jefferson Memorial
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  border=yes
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  George Frideric Handel

Ineligible

Blurb	Reason
Thingyan begins in Myanmar;	refimprove
Cambodian New Year;	refimprove
Lao New Year in Laos;	refimprove
; Thai New Year's Day	unreferenced section
1111 – Henry V, the last ruler of the Salian dynasty, was crowned Holy Roman Emperor.	several CN and clarification tags
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.	refimprove section
1919 – The Provisional Government of the Republic of Korea, a government in exile based in Shanghai during the Japanese occupation of Korea, was formed.	refimprove
1919 – British 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
1945 – World 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.	trivial popular culture listings
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.	unreliable sources
Joe Hewitt (b. 1901)	TFA for 2019

Eligible

• 1829 – The Roman Catholic Relief Act was granted royal assent, removing the most substantial restrictions on Catholics in the United Kingdom.
• 1941 – The Soviet Union and the Empire of Japan signed a neutrality pact, which lasted through most of World War II.
• 1943 – The neoclassical Jefferson Memorial in Washington, D.C., was formally dedicated on the 200th anniversary of Thomas Jefferson's birth.
• 1943 – World 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.
• 1956 – The Vietnamese National Army captured Ba Cụt, military commander of the Hoa Hao religious sect, which ran a de facto state in southern Vietnam in opposition to Prime Minister Ngo Dinh Diem.
• 1958 – In the midst of the Cold War, American pianist Van Cliburn (pictured) won the inaugural International Tchaikovsky Competition in Moscow.
• 1973 – Forty people died when an explosion took place at an ammunition factory in Lapua
• 1984 – Indian forces launched a preemptive attack on the disputed Siachen Glacier region of Kashmir, triggering a military conflict with Pakistan.
• 1997 – In golf, 21-year-old Tiger Woods became the youngest player to win the US Masters, breaking the tournament's record for the lowest four-round score (270 strokes, 18 under par).
• Born/died: Thomas Jefferson (b. 1743) · Henry De la Beche (d. 1855) · Annie Jump Cannon (d. 1941) · Günter Grass (d. 2015)

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

Charred remains of the homeless shelter in Kamień Pomorski, Poland

• 1742 – Messiah, an oratorio by baroque composer George Frideric Handel, premiered in Dublin.
• 1777 – American Revolutionary War: British and Hessian forces conducted a surprise attack against a Continental Army outpost at Bound Brook, New Jersey.
• 1948 – A convoy bringing medical and fortification supplies and personnel to Hadassah Hospital on Mount Scopus was ambushed by Arab forces, leaving about eighty people dead.
• 1973 – Catch a Fire, the landmark reggae album by Bob Marley and the Wailers, was released.
• 2009 – Twenty-three people died in a fire at a homeless hostel (damage pictured) in Kamień Pomorski, Poland, the country's deadliest since 1980.

Catherine de' Medici (b. 1519) · Arthur Herbert, 1st Earl of Torrington (d. 1716) · Al Green (b. 1946)

More anniversaries:

• April 12
• April 13
• April 14