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Carl Sagan Day

On Carl Sagan Day, let's honor the legacy of this brilliant scientist and celebrate our curiosity about the universe.

Monday

November 2026

Last updated February 7, 2026 · by the Holiday Calendar Team

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YEARLY DATENovember 9

OBSERVED INUnited States

CATEGORYCulture

SUBCATEGORYFamous People

INTRO

Introduction

PHOTO

Get ready to celebrate the life and legacy of the brilliant scientist and astronomer, Carl Sagan, on November 9 with Carl Sagan Day! This day honors the man who helped make science more accessible and intriguing to people all over the world. Sagan was not only a pioneer in his field, but he also had a way of inspiring wonder and curiosity in others through his popular TV series "Cosmos" and books like "Contact". So let's take this opportunity to remember and appreciate his contributions to our understanding of the universe.

TIMELINE

Carl Sagan Day Timeline

Carl Sagan's Birth

Carl Sagan was born in Brooklyn, New York, marking the inception of a great mind in the world of science and astronomy.

Sagan joins SETI

Carl Sagan joins SETI (Search for Extraterrestrial Intelligence) project, imparting his knowledge about the cosmos and potential existence of extraterrestrial life.

Cosmos TV Series

The popular TV series “Cosmos”, hosted by Sagan, is first aired, sparking interest in astronomy among millions of viewers worldwide.

"Contact" Book Release

Sagan publishes his book, "Contact", which goes on to become a bestseller and is eventually made into a successful Hollywood movie.

Death of Carl Sagan

Carl Sagan dies at the age of 62, leaving behind a legacy of astronomical discoveries and popular science education.

First Carl Sagan Day

The first Carl Sagan Day is celebrated on what would have been his 75th birthday, beginning an annual tradition to honor his contributions and legacy.

GET INVOLVED

How to Celebrate Carl Sagan Day

Watch "Cosmos" marathon

Gather some friends and spend the day binge-watching Carl Sagan's iconic series, "Cosmos." It's a great way to honor his contributions to science and education.

ATTEND

Attend a star-gazing event

Find a local astronomy club or organization that is hosting a stargazing event on Carl Sagan Day. It's the perfect way to appreciate the wonders of the universe, just like Sagan did.

READ

Read one of his books

Choose one of Carl Sagan's famous books, such as "The Demon-Haunted World" or "Pale Blue Dot," and spend the day reading and reflecting on his profound ideas and insights.

HOST

Host a science-themed party

Invite friends over for a science-themed party, complete with fun experiments, trivia games, and themed snacks like galaxy cupcakes or astronaut ice cream.

CREATE

Create a tribute art piece

Get creative and make an art piece dedicated to Carl Sagan. This could be a painting, drawing, or even a digital design. Share it on social media to spread awareness about his legacy.

WHY THIS DAY MATTERS

Why We Love Carl Sagan Day

He was an advocate for critical thinking and skepticism

Sagan emphasized the importance of questioning everything and using evidence-based reasoning. He promoted critical thinking and skepticism, encouraging people not to blindly accept information but to think for themselves and seek out evidence.

He inspired a love for science and the cosmos

Carl Sagan's enthusiasm for astronomy and his ability to make complex scientific concepts accessible to everyone made him a beloved figure in the world of science. He sparked an interest in space exploration and encouraged people to think critically about the universe.

He was a pioneer in popularizing science through media

Sagan was one of the first scientists to use television as a platform to educate and inspire people about science. His show "Cosmos" reached millions of viewers and continues to be a source of inspiration for generations to come.

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