April 25 is a significant day in Delaware history, with numerous events and happenings taking place over the years. Here are five interesting facts about April 25 in Delaware history:

1. In 1682, William Penn arrived in New Castle, Delaware, on April 25. This was his first visit to the colony that would eventually become the state of Delaware. Penn would go on to found the colony of Pennsylvania and establish Philadelphia as its capital.

2. In 1777, British troops landed near Delaware City on April 25. This was part of a larger invasion of Delaware during the Revolutionary War. The British would occupy Wilmington and other parts of the state before being forced to withdraw after the Battle of Brandywine.

3. In 1840, Delaware ratified its first state constitution on April 25. This constitution established the framework for Delaware's government and set forth the rights and responsibilities of its citizens.

4. In 1901, a major fire broke out in Wilmington on April 25. The fire destroyed numerous buildings in the downtown area and caused millions of dollars in damage. Despite the devastation, no lives were lost in the fire.

5. In 1974, the University of Delaware held its first Earth Day celebration on April 25. This event included a number of environmental activities and demonstrations, and helped to raise awareness of the need to protect the planet.

Overall, April 25 has been a significant day in Delaware history, with important events taking place across a wide range of time periods and contexts. From the arrival of William Penn to the first Earth Day celebration at the University of Delaware, this day has played a key role in shaping the state's past and present.