I'm sorry but Earth Day was NOT invented by a copywriter. He may have come up with a catchier name, but Earth Day was planned, organized and instituted by Sen. Gaylord Nelson (after many attempts to convince previous administrations of its need).

This is what he said about it:

"On April 22, 1970, 20 million people, 2,000 colleges and universities, 10,000 grammar and high schools and 1,000 communities mobilized for the first nationwide demonstrations on environmental problems. Congress adjourned for the day so members could attend Earth Day events in their districts. The response was nothing short of remarkable, and the modern American environmental movement took off.

My major objective in planning Earth Day 1970 was to organize a nationwide public demonstration so large it would, finally, get the attention of the politicians and force the environmental issue into the political dialogue of the nation. It worked. By the sheer force of its collective action on that one day, the American public forever changed the political landscape respecting environmental issues.

Sen. Gaylord Nelson, Dem. Wisc — Founder of Earth Day."