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April 8
April 8, the 98th day of the Gregorian year, is International Romani Day (World Romani Congress, London, 1971). Key events: Entente Cordiale 1904, 17th Amendment ratified 1913, Hank Aaron's 715th home run 1974; born Kofi Annan, died Margaret Thatcher.
April 9
April 9, the 99th day of the year, is marked by Lee's 1865 Appomattox surrender, Germany's 1940 invasion of Denmark and Norway, the 1942 Bataan surrender, NASA's 1959 Mercury Seven announcement, and Georgia's 1991 independence declaration.
April 9 tragedy
The April 9 tragedy, known in Georgian memory as "Bloody Sunday," was the killing of about 20 demonstrators by Soviet troops in Tbilisi, Georgia, on April 9, 1989.
April Baskin
April Baskin is an American Democratic politician from Buffalo representing New York's 63rd State Senate district, after serving as chair of the Erie County Legislature.
April Constitution of Poland
The April Constitution of Poland (Polish: Konstytucja kwietniowa) was adopted on 23 April 1935, replacing the democratic March Constitution of 1921 with an authoritarian system concentrating power in the president.
April Crisis
The April Crisis (Апрельский кризис) was the first crisis of the Russian Provisional Government, when 1917 demonstrations in Petrograd forced Milyukov and Guchkov to resign.
April Laws of 1848
The April Laws of 1848 (1848. évi áprilisi törvények) were 31 laws sanctioned by King Ferdinand V that abolished serfdom and made Hungary a constitutional monarchy.
April M. Perry
April Michelle Perry is an American jurist serving as a United States district judge for the Northern District of Illinois since 2024, appointed by President Biden.
April McClain Delaney
April McClain Delaney (born 1964, Buhl, Idaho) is a Democratic U.S. Representative for Maryland's 6th District since 2025; attorney, Common Sense Media D.C. founder, NTIA deputy administrator, wife of John Delaney, who defeated Neil Parrott in 2024 and David Trone in the 2026 primary.
April Revolution (4·19 혁명)
The April Revolution (4·19 혁명), also known as the April 19 Revolution, was South Korea's 1960 student-led uprising, triggered by election fraud, that forced President Syngman Rhee to resign.
April Ryan
April Ryan is an American journalist and author who has covered six presidential administrations since 1997. She is known for her work on urban issues and race.
April Theses
The April Theses (апрельские тезисы), Lenin's ten directives delivered in Petrograd on April 4 (17), 1917, and published in Pravda, rejected the Provisional Government, called for Soviet power, land nationalization, and a new Communist International.
April Uprising of 1876
The April Uprising of 1876 (Bulgar Isyani) was a Bulgarian revolt against Ottoman rule that broke out in Koprivshtitsa on April 20, 1876, and was suppressed in massacres.
April Verlato
April Verlato is an American politician and attorney who served as Mayor of Arcadia and is the 2026 Republican nominee for the U.S. House in California's 28th district.
April Weaver
April Weaver is an American Republican politician who has represented Alabama's 14th Senate district since 2021, after serving in the state House from 2010 to 2020.
Aprogen
Aprogen (에이프로젠) is a South Korean biopharmaceutical company founded in April 2000 that develops antibody biosimilars and novel antibody drugs, and was named Korea's first biopharmaceutical unicorn in January 2020.
Apsara (अप्सरस्)
Apsara (अप्सरस्, Prakrit accharā): celestial nymphs of Hindu, Buddhist, and Jain mythology, dancers of Indra's heaven and wives of the Gandharvas; named in the Amarakosha (Urvashi, Rambha, Menaka) and depicted across Asian art.
Apsley Cherry-Garrard
Apsley George Benet Cherry-Garrard (1886–1959), English polar explorer and writer; assistant zoologist on Scott's Terra Nova expedition, survivor of the 35-day Cape Crozier winter journey, member of the 1912 search party, and author of The Worst Journey in the World (1922).
APsystems
APsystems (昱能科技) is a Chinese manufacturer of microinverters and module-level power electronics for solar, founded in 2010 in Jiaxing, Zhejiang, and listed on the Shanghai STAR Market.
APT Medical (惠泰医疗)
APT Medical Inc. (惠泰医疗) is a Shenzhen medical device company founded in 2002 that makes cardiac electrophysiology and cardiovascular interventional devices; Mindray has controlled it since 2024.
Apti Alaudinov
Apti Alaudinov, born 1973, is a Russian lieutenant general commanding the Akhmat special forces and deputy head of the Defense Ministry's Main Military-Political Directorate; a former Chechen police deputy minister, Hero of Russia, and prominent war commentator.
Aptitude
Aptitude is the potential to acquire knowledge or skill, measured by aptitude tests (GATB, DAT, ASVAB, formerly the SAT) distinct from achievement tests; validity, fairness, and declining predictive power define the field.
Aptronym
Aptronym (also aptonym, French aptonyme): a person's name that matches their job or main characteristics, from apt + patronym, first recorded in a 1919 dictionary. Distinct from nominative determinism, the contested causal claim that names steer careers.
Apu John Joseph
Apu John Joseph (അപ്പു ജോൺ ജോസഫ്), Kerala Congress politician, MLA for Thodupuzha since May 2026 with 84,796 votes and a 44,291 margin, son of P J Joseph, and Kerala Government Chief Whip with cabinet rank.
Aq Qoyunlu
The Aq Qoyunlu, or White Sheep Turkmen, was a confederation of Turkman tribes ruling eastern Anatolia and western Iran until the Safavid conquest in 1508.
Aq Qoyunlu civil wars and the fall of the dynasty
The Aq Qoyunlu civil wars were succession struggles among the Turkmen Aq Qoyunlu rulers after Sultan Ya'qub's death in 1490, ending with the dynasty's fall to Shah Isma'il I by 1508.
Aq Qoyunlu conquest of western Iran under Uzun Hasan
The Aq Qoyunlu conquest of western Iran under Uzun Hasan (اوزون حسن) destroyed the Qara Qoyunlu state between 1467 and 1469, making Tabriz the capital.
Aq Qoyunlu succession war after Uzun Hasan
The Aq Qoyunlu succession war after Uzun Hasan (جنگ جانشینی آققویونلو) was the 1478 struggle between Uzun Hasan's sons Khalil and Ya'qub, ending with Ya'qub on the throne.
Aq Sunqur al-Hajib
Aq Sunqur al-Hajib (أق سنقر الحاجب), titled Qasim al-Dawla, was a Turkic mamluk commander of Sultan Malikshah I and governor of Aleppo from 1087 to 1094.
Aqemia
Aqemia is a French drug-discovery company, founded in 2019 in Paris, that uses generative AI built on quantum and statistical physics to design small-molecule drugs.