1. The Boston Tea Party Museum opened on May 19, 2012, in Boston, Massachusetts. The museum showcases the history and events leading up to the Boston Tea Party, a revolutionary act of protest against British taxation, which took place on December 16, 1773, in Boston Harbor.

2. On May 19, 1780, during the American Revolutionary War, a general Court-martial was held at William Fiske's Tavern in West Brookfield, Massachusetts. The court-martial was conducted to try several American soldiers who were accused of desertion and other offenses.

3. The Massachusetts Bay Transportation Authority (MBTA), also known as the T, celebrated its 60th anniversary on May 19, 2019. The MBTA is a public transportation system that serves the Greater Boston area and parts of eastern Massachusetts.

4. On May 19, 1897, John F. Kennedy, the 35th President of the United States, was born in Brookline, Massachusetts. Kennedy served as President from January 1961 until his assassination in November 1963.

5. The Salem Witch Trials began on May 19, 1692, in Salem, Massachusetts. The trials, which lasted for over a year, resulted in the execution of 20 people who were accused of practicing witchcraft. Today, the Salem Witch Trials are remembered as one of the darkest moments in American history.