The Cosmic Calendar is a way to visualize the history of the universe in a more accessible format. The calendar compresses the entire history of the universe into a single year, with each day representing approximately 37.8 million years.
On this cosmic calendar, the universe began on January 1st, and the first stars and galaxies did not form until March. Our own Milky Way galaxy was not formed until May, and the Earth did not form until September.
Life on Earth began in late September, with the first single-celled organisms. The first complex organisms, such as fish and plants, did not appear until mid-December. Dinosaurs roamed the Earth in the late afternoon of December 25th, but were wiped out by an asteroid impact on December 30st.
The first humans appeared on the cosmic calendar at 11:52 PM on December 31st, and recorded history began only 1 minute before midnight. The cosmic calendar puts the vastness of time and the history of the universe into perspective, highlighting the relatively recent appearance of humans and our limited time on this planet.
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