What are the important events that happened on April 20? Here are historical events, facts, and some myths about this day.

April 20: Facts & Myths About This Day

April 20 is the 110^th day of the year 2025 in the Gregorian calendar. There are 255 days remaining until the end of this year. The day of the week is Sunday.

Under the Julian calendar, this day is April 7, 2025 – a Sunday. Both day of the week are the same but did you notice the difference with the Gregorian calendar?

When this day started, 29,085,120 minutes has elapsed since midnight of January 1, 1970 – the Unix epoch.

Strange as it may, if we name this day after a polygon then it will be called ‘hectadecagon’ day.

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

According to the lunisolar Chinese calendar, there are 303 days remaining before the start of the next Chinese New Year.

The ancient Maya civilization believes that the end of the world will happen on December 21, 2012. There are now 4,503 days since this fabled cataclysmic event.

April 20 Historical Events

• 1323 –
  The University of Rome La Sapienza is instituted by Pope Boniface VIII.
• 1876 –
  The April Uprising, a key point in modern Bulgarian history, leading to the Russo-Turkish War and the liberation of Bulgaria from domination as an independent part of the Ottoman Empire.
• 1918 –
  Manfred von Richthofen, aka The Red Baron, shoots down his 79th and 80th victims, his final victories before his death the following day.
• 1926 –
  Western Electric and Warner Bros. announce Vitaphone, a process to add sound to film.
• 1980 –
  Climax of Berber Spring in Algeria as hundreds of Berber political activists are arrested.
• 1984 –
  The Good Friday Massacre, an extremely violent ice hockey playoff game, is played in Montreal, Canada.
• 1985 –
  The ATF raids The Covenant, The Sword, and the Arm of the Lord compound in northern Arkansas.
• 1986 –
  Pianist Vladimir Horowitz performs in his native Russia for the first time in 61 years.
• 2007 –
  Johnson Space Center Shooting: A man with a handgun barricades himself in NASA’s Johnson Space Center in Houston, Texas before killing a male hostage and himself.
• 2010 –
  The Deepwater Horizon oil well explodes in the Gulf of Mexico, killing eleven workers and beginning an oil spill that would last five months.

Who were born on April 20?

• 1650 –
  William Bedloe, English informer (d. 1680)
• 1850 –
  Daniel Chester French, American sculptor (d. 1931)
• 1884 –
  Princess Beatrice of Edinburgh and Saxe-Coburg and Gotha (d. 1966)
• 1890 –
  Maurice Duplessis, premier of Quebec (d. 1959)
• 1896 –
  Wilfrid R. “Wop” May, Canadian aviator (d. 1952)
• 1918 –
  Kai Siegbahn, Swedish physicist, Nobel Prize laureate (d. 2007)
• 1947 –
  Ken Scott, English record producer and recording engineer
• 1964 –
  Andy Serkis, English actor
• 1972 –
  Le Huynh Đuc, Vietnamese footballer
• 1973 –
  Lamond Murray, American basketball player

Who died on April 20?

• 1176 –
  Richard de Clare, 2nd Earl of Pembroke, English military leader (b. 1130)
• 1874 –
  Alexander H. Bailey, American politician (b. 1817)
• 1964 –
  Eddie Dyer, American baseball player (b. 1899)
• 1991 –
  Steve Marriott, British singer and songwriter (The Small Faces) (Humble Pie) (b. 1947)
• 1994 –
  Jean Carmet, French actor (b. 1920)
• 1999 –
  Dylan Klebold, perpetrator of the Columbine High massacre (b. 1981)
• 2002 –
  Alan Dale, American singer (b. 1925)
• 2003 –
  Ruth Hale, American playwright and actress (b. 1908)
• 2007 –
  Andrew Hill, American jazz composer and pianist (b. 1931)
• 2011 –
  Chris Hondros, American photographer (b. 1970)