A well-known Chinese proverb states: "A journey of a thousand miles begins with a single step." On March 27, 2021, millions of people worldwide will take the first step towards reversing climate change by turning off all lights and electronics from 8:30 - 9:30 PM local time. The hour-long voluntary rolling blackouts, also observed by landmark structures such as the Eiffel Tower and the Empire State Building, are more than symbolic gestures. They are catalysts for urgent change.