1. In 1646, Connecticut passed a law allowing slavery in the colonies. This law was later abolished in the state in 1848 with the adoption of a new state constitution.

2. On June 15, 1775, the Connecticut Colony declared their support for the newly formed Continental Army, marking the state's involvement in the American Revolution.

3. In 1844, the Charter Oak, an important symbol of Connecticut's colonial history, was struck by lightning and destroyed. The tree had been used as a hiding place for the colony's charter during a dispute with the British government in 1687.

4. On this day in 1864, Connecticut Governor William Buckingham called for a day of fasting and prayer in response to the Civil War. The state sent over 54,000 troops to fight in the war, with over 5,000 losing their lives.

5. In 1971, the city of Hartford hosted the first-ever World Judo Championships held outside of Japan. The event was attended by over 250 competitors from 35 countries and helped to popularize the sport in the United States.