Wikipedia:Selected anniversaries/April 22
April 22: Great Sabbath in Eastern Christianity (2006), Earth Day in the United States.
- 1500 - Portuguese explorer Pedro Álvares Cabral (pictured) and his crew became the first Europeans to sight Brazil.
- 1864 - The U.S. Congress authorized the minting of a two-cent coin, the first U.S. coin to bear the words "In God We Trust".
- 1913 - The Bolshevik newspaper Pravda was first published in Saint Petersburg, Russia.
- 1914 - Babe Ruth played his first professional baseball game as a pitcher for the Baltimore Orioles.
- 1915 - Chlorine gas was released as a chemical weapon in the Second Battle of Ypres, the first large-scale use of poison gas in World War I.