1. American Revolution: Caesar Rodney's ride - On April 17, 1777, Caesar Rodney rode 70 miles from Dover to Philadelphia to cast the deciding vote in favor of the Declaration of Independence.

2. First state to ratify the Constitution - On April 17, 1787, Delaware became the first state to ratify the United States Constitution, helping to pave the way for the country's founding instrument.

3. The Delaware Memorial Bridge opens - The Delaware Memorial Bridge, connecting Delaware and New Jersey, officially opened on April 17, 1951. At the time, it was the world's longest twin-suspension bridge.

4. Iron Hill Brewery founded - On April 17, 1996, the first Iron Hill Brewery & Restaurant opened in Newark, Delaware. Today, the brewery has expanded to 17 locations across Pennsylvania, New Jersey, and Delaware.

5. Dover International Speedway hosts first NASCAR race - On April 17, 1969, Dover International Speedway hosted its first NASCAR race, the "Mason-Dixon 300." The track has since become a staple on the NASCAR circuit, hosting two major racing weekends each year.