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
- 1058 –Agnes de Poitou and Andrew I of Hungary meet to negotiate about the border-zone in present-day Burgenland.
- 1187 –Saladin begins the Siege of Jerusalem.
- 1260 –the Great Prussian Uprising among the old Prussians begins against the Teutonic Knights.
- 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).
- 1848 –The American Association for the Advancement of Science is created.
- 1854 –Battle of Alma: British and French troops defeat Russians in the Crimea.
- 1860 –The Prince of Wales (later King Edward VII of the United Kingdom) visits the United States.
- 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.
- 1909 –The Parliament of the United Kingdom passes the South Africa Act 1909, creating the Union of South Africa from the British Colonies of the Cape of Good Hope, Natal, Orange River Colony, and the Transvaal Colony.
- 1930 –Syro-Malankara Catholic Church is formed by Archbishop Mar Ivanios.
- 1961 –Greek general Konstantinos Dovas becomes Prime Minister of Greece.
- 1967 –RMS Queen Elizabeth 2 is launched at John Brown & Company, Clydebank, Scotland. It is operated by the Cunard Line.
- 1970 –Syrian tanks roll into Jordan in response to continued fighting between Jordan and the fedayeen.
- 1971 –Having weakened after making landfall in Nicaragua the previous day, Hurricane Irene regains enough strength to be renamed Hurricane Olivia, making it the first known hurricane to cross from the Atlantic Ocean into the Pacific.
- 1982 –The National Football League players begin a 57-day strike.
- 1990 –South Ossetia declares its independence from Georgia.
- 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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