1. The American Revolution began on April 19, 1775. This day saw the start of the Battles of Lexington and Concord in Massachusetts, which marked the beginning of the Revolutionary War. Connecticut residents played a significant role in the conflict, contributing soldiers, supplies, and financing to the Continental Army.

2. On April 19, 1897, the Connecticut State Library opened its doors to the public. Today, the library remains a vital resource for scholars, researchers, and anyone seeking to learn more about the history of Connecticut and the United States.

3. The Hartford Circus Fire occurred on April 19, 1944, in Hartford, Connecticut. The blaze started during a Ringling Bros. and Barnum & Bailey Circus performance, killing 167 people and injuring more than 700 others. The tragedy led to changes in fire safety regulations and improved safety standards for public events.

4. On April 19, 1989, a bomb exploded in a parked van outside the U.S. District Courthouse in New Haven, Connecticut. The blast caused extensive damage but no injuries. The incident was later linked to a radical anti-government group known as the May 19th Communist Organization.

5. April 19, 2004, marked the first Freestyle Motocross World Championships, held at the Hartford Civic Center. The event, which included high-flying stunts and daring feats, drew crowds of spectators from across the state and around the world.