1. In 1770, the Boston Massacre occurred on March 5, resulting in the death of five colonists and the injury of six others. This event played a significant role in the lead up to the American Revolution.

2. On March 5, 1850, the Boston Public Library was established, making it the first publicly supported free municipal library in the United States.

3. In 1868, a deadly fire broke out at the Pemberton Mill factory in Lawrence, Massachusetts on March 5. The collapse of the building caused over a hundred deaths and injuries, making it one of the worst industrial accidents in Massachusetts history.

4. March 5, 1908, marked the birth of Rex Trailer, a beloved children's television host in Massachusetts. For over 20 years, Trailer hosted "Boomtown," featuring music, games, and educational segments for kids.

5. In 1968, Massachusetts Senator Ted Kennedy announced his candidacy for the Democratic nomination for President on March 5. Although he ultimately lost the nomination, Kennedy went on to serve as a senator for Massachusetts for over four decades.