1. In 1861, just weeks before the start of the Civil War, Pennsylvania Governor Andrew Curtin authorized the creation of the 25th Pennsylvania Volunteer Infantry Regiment, which would go on to serve in many major battles, including Antietam, Gettysburg, and Appomattox.

2. On February 25, 1927, Pennsylvania native and aviation pioneer Charles Lindbergh made his first solo flight, launching his career as one of the most celebrated pilots in history.

3. In 1964, Harrisburg became the first city in the United States to implement a uniform building code, ensuring that all new construction would be safe and meet certain standards.

4. On this day in 1980, the Pennsylvania Department of Environmental Resources announced that the notorious toxic waste site known as "Love Canal" would be evacuated and cleaned up, after years of pollution threatened the health of residents in the area.

5. February 25, 2015 saw a major milestone in the Pennsylvania legal system, as the state's ban on same-sex marriage was officially struck down by a federal judge, paving the way for marriage equality in the state.