1. On April 22, 1636, the first settlement in what is now Connecticut, known as the Saybrook Colony, was established. The colony went on to become an important trade hub and played a significant role in the early history of Connecticut.

2. In 1775, on April 22, the first military action of the American Revolutionary War took place in Connecticut. British troops set fire to a supply depot in Danbury, causing significant damage to the colonial forces.

3. On April 22, 1907, the first electrically-powered streetcar system in Connecticut began operation in Hartford. The system consisted of 26 miles of track and ran until 1941.

4. In 1970, April 22 was designated as Earth Day by U.S. Senator Gaylord Nelson, who was born and raised in Connecticut. The day is now recognized globally as a time to focus on environmental awareness and protection.

5. On April 22, 2004, the University of Connecticut women's basketball team won its third consecutive national championship. The team, led by head coach Geno Auriemma and star player Diana Taurasi, went on to win five more national titles in the following years.