1. In 1934, the West Hartford Reservoir was dedicated and opened to the public on May 4. The reservoir covers over 3,000 acres and provides drinking water to the Hartford area.

2. On May 4, 1991, the state of Connecticut designated the American Robin as the official state bird. The American Robin is a common sight throughout Connecticut and is known for its distinctive red breast.

3. The USS Connecticut, a nuclear-powered submarine, was commissioned by the US Navy on May 4, 1998. The submarine was named after the state and is one of the most advanced and powerful submarines in the world.

4. In 2006, the Connecticut Women's Hall of Fame opened its permanent exhibit at the University of Connecticut. The Hall of Fame honors outstanding Connecticut women who have made significant contributions in their fields.

5. The Connecticut Science Center opened its doors to the public on May 4, 2009. The Science Center is a state-of-the-art museum dedicated to showcasing the latest advancements in science and technology. It features interactive exhibits, a planetarium, and a variety of educational programs for children and adults.