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.

You can browse the full year calendar in case you need it.

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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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