1. Juneteenth: June 19th, also known as Juneteenth, celebrates the emancipation of slaves in the United States. Although it originated in Texas, it has grown in popularity and recognition throughout the country. Pennsylvania officially recognized Juneteenth as a state holiday in 2019.

2. The Battle of Gettysburg: The Battle of Gettysburg, which began on June 19, 1863, was a major turning point in the Civil War. The three-day battle resulted in a Union victory, and it is considered one of the bloodiest battles in American history.

3. Pennsylvania ratifies the Constitution: On June 19, 1788, Pennsylvania became the second state to ratify the United States Constitution, after Delaware. This helped pave the way for the new government to be formed and for the Constitution to take effect.

4. Punxsutawney Phil's prediction: On June 19, 1974, Punxsutawney Phil made his first summer prediction. This tradition, which originated in Pennsylvania, involves a groundhog predicting whether or not there will be six more weeks of winter.

5. The Great Railroad Strike: In June 1877, a nationwide strike by railroad workers began in Martinsburg, West Virginia. The strike quickly spread to other states, including Pennsylvania, where it turned violent. It resulted in the deaths of many workers and led to major changes in labor laws and relations.