1. On June 2, 1752, the first theater in Delaware, the "New Castle Theatre," opened its doors to the public. The theater was located in New Castle and attracted many local and traveling productions.

2. On June 2, 1865, the 5th Delaware Regiment was mustered out of the Union Army following the end of the Civil War. The regiment had fought in numerous battles, including Antietam and Gettysburg.

3. The first official celebration of Arbor Day in Delaware was held on June 2, 1887. The holiday was established to encourage the planting of trees and has since spread to many other states.

4. On June 2, 1923, the DuPont Company opened a new research laboratory in Wilmington. The laboratory would later become the company's main research and development facility and played a crucial role in the development of many important materials and products.

5. June 2, 1937 marked the dedication of the Delaware Memorial Bridge, which spans the Delaware River and connects Delaware and New Jersey. At the time of its construction, the bridge was the longest suspension bridge in the world.