This Day In History : September 20

1848 United States

AAAS founded

The American Association for the Advancement of Science (AAAS) was founded on September 20, 1848, in Philadelphia, Pennsylvania. It is dedicated to advancing science, engineering, and innovation globally. AAAS publishes the renowned journal Science and organizes conferences that promote collaboration among scientists and the dissemination of scientific knowledge.        

Also on This Day in History September 20

Discover what happened on September 20 with HISTORY's summaries of major events, anniversaries,
famous births and notable deaths.

Births on This Day, September 20
  • 1842 James Dewar

    Scottish chemist and physicist (Dewarfles/cordiet)

  • 1911 Shriram Sharma

    Indian spiritual leader and founder of "All World Gayatri Pariwar"

  • 1954 Lloyd Blankfein

    American CEO and Chairman of Goldman Sachs

  • 1960 James A. Pawelczyk

    American astronaut (sk STS 90)

  • 1819 Frederick Ellsworth Sickels

    American inventor of a valve for steam engines

Deaths on This Day, September 20
  • 1930 Gombojab Tsybikov

    Russian explorer

  • 1960 Ernest Goodpasture

    American research scientist, the founder of mumps vaccine, Professor of Pathology

  • 2000 Gherman Titov

    Russian cosmonaut and 4th person in space

  • 1996 Paul Erdos

    Hungarian mathematician, who was one of the century's top math experts and pioneered the fields of number theory and combinatorics

  • 1933 Annie Besant

    English social reformer and supporter of Indian independence


The first Cannes Film Festival held

The first Cannes Film Festival was held from September 20 to October 5, 1946, in Cannes, France. It was established as an international film festival to showcase and celebrate the best in cinema from around the world. The inaugural festival attracted notable filmmakers, actors, and industry professionals, marking the beginning of what would become one of the most prestigious and influential film festivals globally.

Vietnam is admitted to the United Nations

Vietnam was admitted to the United Nations on September 20, 1977. This event marked its recognition as a sovereign state and its inclusion in the international community through membership in the United Nations.

The Deep Impact spacecraft was declared dead by NASA

NASA declared the Deep Impact spacecraft dead on September 20, 2013, marking the end of its mission after more than eight years in space. Deep Impact was launched on January 12, 2005, with the primary objective of studying Comet Tempel 1. Its most notable achievement occurred on July 4, 2005, when it deployed an impactor that collided with the comet, creating a crater and revealing its interior structure.

Spanish Legion Founded

The Spanish Legion, officially known as the "Tercio de Extranjeros" or "Tercio de Marruecos," was founded on September 20, 1920. It was established by royal decree as an elite unit of the Spanish Army, initially composed of foreign volunteers. The Legion has since become renowned for its rigorous training, discipline, and participation in various military operations and conflicts throughout its history.
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