June 20 corresponds to the 171st day of the Gregorian calendar (172th in a leap year).
451 - Battle of the Catalan Plains: Flavius Aetius fights Attila of the Huns.
1667 - Pope Clement IX becomes 238th Pope.
1685 - The Monmouth Rebellion: James Scott proclaims himself King of England at Bridgewater.
1789 - Tennis Court Pledge, Commonwealth Members of the Three Divisions gather on the tennis court to sign the oath (French Revolution)
1791 - French Revolution: Louis XVI and his royal family escape the Tuileries Palace in Paris and attempt asylum abroad.
1792 - French Revolution: Parisians raid the royal palace.
1837 - Queen Victoria succeeds the British throne.
1960 - Senegal becomes independent.
1975 - The murder of Lee Pal-guk's wife takes place in Myeongnyun-dong, Jongno-gu, Seoul.
2004 - Archbishop Sotirios Trambas becomes the first diocesan of the Korean Orthodox Church.
1962 - Yanghwa Bridge began construction.
2003 - The Wikimedia Foundation is founded.
2004 - Archbishop Sotirios Trambas is enthroned as the first archbishop of the Korean Orthodox Church.
2008 - Magok Station on Seoul Subway Line 5, which had been neglected as a non-stop transit station for 12 years, started operating.
2013 - Lee Seung-yeop of the Samsung Lions hit his career-high 352 home run. This was a new record for most Korean players.
1469 – Gian Galeazzo Sforza, 6th Duke of Milan (b.
1566 – Bazaar of Sigmund III, King of Poland (Sigismund of Sweden).
1634 – Carlo Emanuele II, Duke of Savoy.
1819 – Jacques Offenbach, French composer (b.
1905 – Lillian Hellman, American writer (b.
1902 – Jeong Ji-yong, a South Korean poet.
1924 – Chet Atkins, an American musician.
1949 – Lionel Richie, American singer-songwriter (b.
1952 – John Goodman, an American actor.
1958 – Jang Jeong-hee, a South Korean actress.
1964 – Jang Se-jin, South Korean actress (b.
1967 – Nicole Kidman, Australian actress (b.
1968 – Robert Rodriguez, American film director (b.
Dali (No Brain), a South Korean singer and drummer.
Jeong Ga-eun is a South Korean actress.
Jung Ji-won, a South Korean announcer.
Japanese actress Saki Aibu.
Ha Hyun-jung, Miss Korea of Korea.
Kim Su-ji, South Korean volleyball player.
1989 – Javier Pastore, Argentine footballer (b.
1992 – Kim Woo-jin, South Korean archer (b.
2002 – Jang Jae-young, South Korean baseball player (b.
1597 – Willem Barents, Dutch navigator and explorer (d.
1837 – William IV, 5th King of Hanover, England (b.
1870 – Jules de Goncourt, French critic (d.
1916 – Park Je-soon, one of the Eulsaojeoks.
1951 – Kim Sang-yong, a Korean poet (b.
1965 – Bernard Barouk, American politician (b.
1994 – John Farrell, American speed skater (b.
2001 – Kim In-seung, South Korean painter (b.
2005 – Jack Kilby, an American scientist (b.
2010 – Abdolmalek Rigi, an Iranian terrorist (b.
2013 – James Gandolfini, American actor (b.
2017 – Yang Seung-chun, South Korean graphic designer (b.
2018 – Peter Thompson, Australian golfer (b.
2021 – Luis del Sol, Spanish footballer (b.
World Refugee Day
Flag Day: Argentina
West Virginia Day: West Virginia
Martyr's Day: Eritrea
Day of the gas sector: Azerbaijan
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Lunar calendar: June 20