1. On September 30, 1630, the first ship of Puritans arrived in the Massachusetts Bay Colony. The ship, named the "Arbella," carried about 700 settlers, including the colony's first governor, John Winthrop.

2. On September 30, 1777, Benedict Arnold led a successful attack against the British at the Battle of Saratoga. This victory was a turning point in the Revolutionary War and helped secure support from France.

3. On September 30, 1834, the first railroad in the United States was opened for public use in Massachusetts. The railroad, called the Granite Railway, was used to transport granite from Quincy to Charlestown.

4. On September 30, 1918, the first Massachusetts state flag was officially adopted. The design of the flag features a blue shield with an image of a Native American holding a bow and arrow, and a white star representing Massachusetts as one of the original 13 colonies.

5. On September 30, 1992, the first phase of Boston's "Big Dig" project began. This massive infrastructure project involved the construction of tunnels and bridges to reroute the city's highways underground. The project took over 15 years to complete and cost over $14 billion.