About September 20
September 20, 2025 is the 263rd day of the year 2025 in the Gregorian calendar. There are 102 days remaining until the end of this year. The day of the week is Saturday.
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Virgo is the sun sign of a person born on this day. Sapphire is the modern birthstone for this month. Agate is the mystical birthstone from Tibetan origin that dates back over a thousand years.
According to the lunisolar Chinese calendar, there are 150 days remaining before the start of the next Chinese New Year.
What Happened On September 20
- 1187 –Saladin begins the Siege of Jerusalem.
- 1596 –Diego de Montemayor founds the city of Monterrey in New Spain.
- 1697 –The Treaty of Rijswijk is signed by France, England, Spain, the Holy Roman Empire and the Dutch Republic ending the Nine Years’ War (1688–97).
- 1835 –Ragamuffin rebels capture Porto Alegre, then capital of the Brazilian imperial province of Rio Grande do Sul, triggering the start of ten-year-long Farroupilha Revolution.
- 1848 –The American Association for the Advancement of Science is created.
- 1870 –Bersaglieri corps enter Rome through the Porta Pia and complete the unification of Italy.
- 1881 –Chester A. Arthur is inaugurated as the 21st President of the United States following the assassination of James Garfield.
- 1893 –Charles Duryea and his brother road-test the first American-made gasoline-powered automobile.
- 1906 –Cunard Line’s RMS Mauretania is launched at the Swan Hunter & Wigham Richardson shipyard in Newcastle upon Tyne, England.
- 1910 –The ocean liner SS France, later known as the “Versailles of the Atlantic”, is launched.
- 1920 –Foundation of the Spanish Legion.
- 1961 –Greek general Konstantinos Dovas becomes Prime Minister of Greece.
- 1962 –James Meredith, an African-American, is temporarily barred from entering the University of Mississippi.
- 1970 –Syrian tanks roll into Jordan in response to continued fighting between Jordan and the fedayeen.
- 1973 –Billie Jean King beats Bobby Riggs in The Battle of the Sexes tennis match at the Houston Astrodome in Houston, Texas.
- 1990 –South Ossetia declares its independence from Georgia.
- 2000 –The British MI6 Secret Intelligence Service building is attacked by unapprehended forces using a Russian-built RPG-22 anti-tank missile.
- 2002 –The Kolka-Karmadon rock/ice slide.
- 2003 –Maldives civil unrest: the death of prisoner Hassan Evan Naseem sparks a day of rioting in Malé.
- 2008 –A dump truck full of explosives detonates in front of the Marriott hotel in Islamabad, Pakistan, killing 54 people and injuring 266 others.
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