Some notable events that occurred on September 20 include:
1697: The Peace of Ryswick is signed, ending the Nine Years' War between France and the Grand Alliance.
1792: The French National Convention abolishes the monarchy and proclaims the First French Republic.
1846: Urbain Le Verrier announces the discovery of Neptune, the eighth planet from the Sun.
1897: The Pullman Strike, a major railroad strike in the United States, begins.
1934: The League of Nations appeals to Japan to withdraw from Manchuria, which they had invaded earlier in the year.
1954: The Gulf of Tonkin Resolution is passed by the United States House of Representatives, giving President Lyndon B. Johnson the authority to use military force against North Vietnam.
1963: Four young girls are killed in the bombing of the 16th Street Baptist Church in Birmingham, Alabama.
1968: The Soviet Union successfully launches the Zond 5 spacecraft, which returns to Earth after a mission that included a circumlunar flight.
1977: Voyager 2 is launched from Kennedy Space Center.
1994: Kurt Cobain, the lead singer of the grunge band Nirvana, is found dead at his home in Seattle, Washington.
2001: The United States Congress passes the USA PATRIOT Act in response to the September 11 terrorist attacks.
2005: Hurricane Rita makes landfall in the United States, causing widespread damage in Louisiana and Texas.
2015: Pope Francis arrives in the United States for a six-day papal visit.
Historical birthdays that fall on September 20 include:
George I of Great Britain (1660)
Josephine (1763)
Lord Byron (1788)
Edgar Degas (1834)
Leo Tolstoy (1828)
Grace Hopper (1906)
David Ben-Gurion (1886)
Jimmy Carter (1924)
Sophia Loren (1934)
Joe Biden (1942)
Famous people who died on September 20 include:
Thomas Jefferson (1826)
Charlotte Brontë (1855)
George Westinghouse (1914)
John Steinbeck (1968)
Elvis Presley (1977)
Jerry Garcia (1995)
Carl Sagan (1996)
These are just a few of the notable events and birthdays that fall on September 20.