CONCEPT
The Cosmic Calendar
The cosmic calendar, introduced in The Dragons of Eden (1977) and elaborated in Cosmos (1980), maps the entire history of the universe onto a twelve-month calendar. The Big Bang occurs at midnight on January 1. The Milky Way forms around March. The Sun and Earth come into existence around September 2. The first life appears around September 21. Multicellular organisms arrive in late November. Dinosaurs appear on December 25 and vanish on December 30. The entire history of human civilization occupies the final seconds of December 31. Writing was invented about five seconds before midnight. The printing press arrived roughly one second ago. Artificial intelligence, the scientific revolution, and everything else occurred in the last fraction of the last second.
In The You On AI Field Guide
The calendar was designed to make a quantitative fact — 13.8 billion years of cosmic history — qualitatively graspable. Human intuition is not equipped for timescales that exceed a few generations. Numbers like 'thirteen billion' produce