The April 22 date for the first Earth Day stemmed from a much-earlier observance: Arbor Day, which began in Nebraska in 1872.
Today, a common practice in celebration of Earth Day is still to plant new trees
Bottom line: Why do we celebrate Earth Day on April 22?
The date stems from an earlier observance, Arbor Day. And the date of Arbor Day was set due to the birthday of J. Sterling Morton, a Nebraska pioneer and journalist, who launched the first Arbor Day in 1872.
These cakes are beautiful. Their Designers did a great job.