Carl Sagan Day - November 9
Thu, Nov 9, 2023

Carl Sagan Day

Carl Sagan Day is a holiday dedicated to the life and work of the famous scientist Carl Sagan. Sagan was a versatile person, fond of space, and wrote many books which proved invaluable for the development of science. He specialized in demonstrating the production of various amino acids through the action of radiation on chemicals, and tried to prove the existence of extraterrestrial life by collecting messages that could be heard and understood by aliens. He also disproved the theory that extremely high temperatures on the planet Venus can be calculated using the principle of the greenhouse effect.


The initiation of this holiday is credited to the Center for Investigation in Fort Lauderdale, atheists from Florida, and other public organizations. Initially, the events were held in Florida, but quickly spread throughout the country and even the world. Events typically relate to astronomy, such as seminars, lectures, and themed fairs.

Interesting facts

  • Sagan achieved success in many fields, such as astronomy, astrophysics, and astrobiology.
  • He was famous for his ability to convey scientific teachings and ideas to the population without frightening them.
  • His most popular work is the documentary Space: A Personal Journey, for which he was awarded two prizes. The film was watched by about a billion people in sixty countries.
  • He wrote two dozen books, including the series, and a film was made based on the book Contact.
  • Since 1950, Sagan served as a consultant and advisor to NASA.

How to take part

You can take part in Carl Sagan Day by watching films based on his books, such as Contact or Space. Discuss your favorite episodes with your friends and read more about this amazing person. Tell your children, friends, and followers on social networks about him. Admire the stars – the light it emits is captivating and will make you forget about the mundane.

When is Carl Sagan Day celebrated in 2023?

Carl Sagan Day is observed on November 9 each year.


Weekday Month Day Year
Thursday November 9 2023
Saturday November 9 2024
Sunday November 9 2025
Monday November 9 2026

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