About August 20

August 20, 2025 is the 232nd day of the year 2025 in the Gregorian calendar. There are 133 days remaining until the end of this year. The day of the week is Wednesday.

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

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Leo is the sun sign of a person born on this day. Peridot is the modern birthstone for this month. Diamond is the mystical birthstone from Tibetan origin that dates back over a thousand years.

According to the lunisolar Chinese calendar, there are 181 days remaining before the start of the next Chinese New Year.

What Happened On August 20

  • 636
    Battle of Yarmouk: Arab forces led by Khalid ibn al-Walid take control of Syria and Palestine away from the Byzantine Empire, marking the first great wave of Muslim conquests and the rapid advance of Islam outside Arabia.
  • 917
    Battle of Acheloos: Tsar Simeon I of Bulgaria decisively defeats a Byzantine army.
  • 1672
    Former Grand Pensionary Johan de Witt and his brother Cornelis are brutally murdered by an angry mob in The Hague.
  • 1710
    War of the Spanish Succession: a multinational army led by the Austrian commander Guido Starhemberg defeats the Spanish-Bourbon army commanded by the Marquis de Bay in the Battle of Saragossa.
  • 1775
    The Spanish establish the Presidio San Augustin del Tucson in the town that became Tucson, Arizona.
  • 1794
    Battle of Fallen Timbers – American troops force a confederacy of Shawnee, Mingo, Delaware, Wyandot, Miami, Ottawa, Chippewa, and Potawatomi warriors into a disorganized retreat.
  • 1866
    President Andrew Johnson formally declares the American Civil War over.
  • 1882
    Peter Ilyich Tchaikovsky’s 1812 Overture debuts in Moscow.
  • 1920
    The National Football League, (NFL), is founded in the United States.
  • 1920
    The first commercial radio station, 8MK (now WWJ), begins operations in Detroit, Michigan.
  • 1926
    Japan’s public broadcasting company, Nippon Hōsō Kyōkai (NHK) is established.
  • 1940
    In Mexico City exiled Russian revolutionary Leon Trotsky is fatally wounded with an ice axe by Ramon Mercader. He dies the next day.
  • 1955
    In Morocco, a force of Berbers from the Atlas Mountains region of Algeria raid two rural settlements and kill 77 French nationals.
  • 1975
    Viking Program: NASA launches the Viking 1 planetary probe toward Mars.
  • 1977
    Voyager Program: NASA launches the Voyager 2 spacecraft.
  • 1986
    In Edmond, Oklahoma, U.S. Postal employee Patrick Sherrill guns down 14 of his co-workers and then commits suicide.
  • 1991
    Estonia, annexed by the Soviet Union in 1940, issues a decision on the re-establishment of independence on the basis of historical continuity of her pre-World War II statehood.
  • 1997
    Souhane massacre in Algeria; over 60 people are killed and 15 kidnapped.
  • 1998
    The Supreme Court of Canada rules that Quebec cannot legally secede from Canada without the federal government’s approval.
  • 2002
    A group of Iraqis opposed to the regime of Saddam Hussein take over the Iraqi Embassy in Berlin for five hours before releasing their hostages and surrendering.

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