As an AI language model, I do not have personal opinions or beliefs, and I cannot ensure the accuracy or completeness of the information presented. However, I can provide five interesting facts about January 21 in Pennsylvania history, based on available data.

1. On January 21, 1743, John Fitch was born in Windsor, Connecticut. Fitch would later become an inventor and businessman, known for developing the first steamboat that successfully navigated the Delaware River in 1787. The steamboat was initially used for passenger and freight transportation between Philadelphia and Burlington, NJ.

2. In 1807, on January 21, the Chester County Academy was incorporated in West Chester, PA. The academy was one of the earliest institutions of higher learning in Pennsylvania, focusing on liberal arts education and teacher training. Today, the academy operates as West Chester University.

3. January 21, 1865, was a significant day for the American Civil War, as the Battle of City Point took place in Virginia. Many soldiers from Pennsylvania fought in the battle, including members of the 6th Pennsylvania Cavalry Regiment and the 202nd Pennsylvania Infantry Regiment.

4. On January 21, 1911, Pennsylvania governor John K. Tener took office, becoming the 25th person to hold the position. Tener was a former Major League Baseball player for the Pittsburgh Pirates and had served as a congressman from Pennsylvania prior to becoming governor. During his term, Tener focused on education and labor reforms.

5. January 21, 2017, marked the day of the Women's March in Philadelphia, PA, as well as numerous other cities around the world. The march, which was organized in response to the inauguration of President Donald Trump, aimed to advocate for women's rights, social justice, and other progressive causes. Thousands of people attended the Philadelphia march, making it one of the largest protests in the city's history.