“Stop calling it Earth Day. It’s Vladimir Lenin’s Birthday.”
April 20th - also Hitler’s birthday.
They changed the calendar in use since Lenin was born, now Wikipedia reports him being born on the 22nd, but I remember it used to be the 20th.
Please disregard my previous post, I had the wrong date for Earth date - it is the 22nd.
Coincidentally, the first Earth Day was the 100th anniversary of Lenin’s birth.