September 20th is the 263rd day of the year (264th in leap years) in the Gregorian calendar. There are 102 days remaining in the year.1519 • Portuguese navigator Ferdinand Magellan left Spain to find a route to the Spice Islands of Indonesia. Magellan was killed during the trip, but one of his ships eventually made the journey.
1633 • Galileo Galilei is tried before the Congregation for the Doctrine of the Faith for teaching that the Earth orbits the Sun.
1953 • Jimmy Stewart debuted on the radio western The Six Shooter on NBC.
1973 • Billie Jean King beats Bobby Riggs in The Battle of the Sexes tennis match at the Houston Astrodome in Houston, TX.
1984 • The Cosby Show premiered on NBC-TV.
1995 • The U.S. House of Representatives voted to drop the national speed limit. This allowed the states to decide their own speed limits.
2011 • The United States ends its “Don’t Ask, Don’t Tell” policy, allowing gay men and women to serve openly for the first time.
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