Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held in 1970, it now includes a wide range of events coordinated globally including 1 billion people in more than 193 countries. The official theme for 2024 is Planet vs. Plastics.

This Pretty Planet, a song composed by Tom Chapin and John Forster, was played to wake up astronauts aboard the Space Shuttle. It is sung first in unison and then in a round.