About May 31

May 31, 2025 is the 151st day of the year 2025 in the Gregorian calendar. There are 214 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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Gemini is the sun sign of a person born on this day. Emerald is the modern birthstone for this month. Sapphire is the mystical birthstone from Tibetan origin that dates back over a thousand years.

According to the lunisolar Chinese calendar, there are 262 days remaining before the start of the next Chinese New Year.

What Happened On May 31

  • 526
    A devastating earthquake strikes Antioch, Turkey, killing 250,000.
  • 1578
    King Henry III lays the first stone of the Pont Neuf (New Bridge), the oldest bridge of Paris.
  • 1669
    Citing poor eyesight, Samuel Pepys records the last event in his diary.
  • 1790
    Alferez Manuel Quimper explores the Strait of Juan de Fuca.
  • 1790
    French Revolution: the Revolutionary Tribunal is suppressed.
  • 1805
    French and Spanish forces begin the assault against British forces occupying Diamond Rock
  • 1854
    The civil death procedure is abolished in France.
  • 1859
    The clock tower at the Houses of Parliament, which houses Big Ben, starts keeping time.
  • 1862
    American Civil War Peninsula Campaign: Battle of Seven Pines or (Battle of Fair Oaks) – Confederate forces under Joseph E. Johnston & G. W. Smith engage Union forces under George B. McClellan outside Richmond, Virginia.
  • 1864
    American Civil War Overland Campaign: Battle of Cold Harbor – The Army of Northern Virginia under Robert E. Lee engages the Army of the Potomac under Ulysses S. Grant & George G. Meade.
  • 1909
    The National Negro Committee, forerunner to the NAACP, convenes for the first time.
  • 1911
    President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
  • 1911
    The hull of the ocean liner RMS Titanic is launched.
  • 1916
    World War I: Battle of Jutland – The British Grand Fleet under the command of Sir John Jellicoe & Sir David Beatty engage the Kaiserliche Marine under the command of Reinhard Scheer & Franz von Hipper in the largest naval battle of the war, which proves indecisive.
  • 1924
    The Soviet Union signs an agreement with the Peking government, referring to Outer Mongolia as an “integral part of the Republic of China”, whose “sovereignty” therein the Soviet Union promises to respect.
  • 1941
    A Luftwaffe air raid in Dublin, Ireland, claims 38 lives.
  • 1971
    In accordance with the Uniform Monday Holiday Act passed by the U.S. Congress in 1968, observation of Memorial Day occurs on the last Monday in May for the first time, rather than on the traditional Memorial Day of May 30.
  • 2005
    Vanity Fair reveals that Mark Felt was Deep Throat.
  • 2009
    Anti-abortion activist Scott Roeder shoots and kills physician George Tiller during church services in Wichita, Kansas.
  • 2010
    In international waters, armed Shayetet 13 commandos, intending to force the flotilla to anchor at the Ashdod port, boarded ships trying to break the ongoing blockade of the Gaza Strip, resulting in 9 civilian deaths when teams of IHH activists on the MV Mavi Marmara attacked them with knives and metal rods and abducted one of the soldiers.

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