1. In 1813, the Delaware General Assembly voted to abolish slavery in the state, making it the first state to do so south of the Mason-Dixon line. However, it's important to note that the Emancipation Proclamation did not come until 1863, and even then, it did not apply to all states or all enslaved people.

2. The Delaware Memorial Bridge, which connects Delaware to New Jersey, opened on December 30, 1951. The bridge spans over 13,000 feet and is one of the largest suspension bridges in the world.

3. On December 30, 1803, the town of Wilmington was ravaged by a massive fire that destroyed over 100 buildings. The fire started in a stable and quickly spread throughout the town, causing millions of dollars in damages.

4. December 30, 1862 marked the Battle of Dumfries, a significant moment in the American Civil War. It was fought between Confederate forces and Union soldiers attempting to capture a strategic point at Occoquan River. While the Confederates initially pushed back the Union army, they were ultimately defeated and forced to retreat.

5. The Delaware Historical Society was founded on December 30, 1864. Today, the society is dedicated to preserving the rich history of Delaware and promoting education and scholarship on the state's past. They operate several museums and historic sites throughout the state.