December 28 has been a significant day in Pennsylvania's history. From the founding of the state to unique and noteworthy events, here are five interesting facts about December 28 in Pennsylvania history.

1. Pennsylvania was founded on December 28, 1682.

William Penn signed the charter to create the colony of Pennsylvania on December 28, 1682. This event marked the beginning of Pennsylvania's long history as one of the original thirteen colonies.

2. John von Neumann born in Budapest and later contributed to the development of the University of Pennsylvania's Institute for Advanced Study.

John von Neumann, a mathematician and physicist who made significant contributions to the development of the modern computer, was born on December 28, 1903, in Budapest, Hungary. Later in life, von Neumann became heavily involved in the development of the University of Pennsylvania's Institute for Advanced Study.

3. The First Presbyterian Church in Philadelphia was dedicated on December 28, 1794.

The First Presbyterian Church, located in Philadelphia, was dedicated on December 28, 1794. This historic church has hosted numerous notable individuals, including founding fathers like Benjamin Rush, Stephen Girard, and Robert Morris.

4. President Herbert Hoover dedicated the National Christmas Tree on December 28, 1931.

On December 28, 1931, President Herbert Hoover dedicated the National Christmas Tree on the ellipse in front of the White House. This tradition has continued ever since, with every U.S. president continuing the annual lighting ceremony.

5. Pennsylvania native Edwin Hubble solved the mystery of the Andromeda Galaxy on December 28, 1924.

On December 28, 1924, Pennsylvania native and astronomer Edwin Hubble discovered the Andromeda Galaxy, solving a mystery that had puzzled astronomers for centuries. Hubble's discovery helped to revolutionize our understanding of the universe and establish the science of astrophysics.

In conclusion, December 28 has been a significant day in Pennsylvania's history, marking the founding of the state, the dedication of historic landmarks, and important scientific discoveries.