1. On September 5, 1774, the First Continental Congress convened in Philadelphia. This historic meeting brought together delegates from 12 colonies, including Massachusetts, to discuss their grievances against British rule and to coordinate a unified response to the Intolerable Acts.

2. In 1836, Samuel Morse demonstrated his newly-developed telegraph system to Massachusetts Governor Edward Everett in the State House in Boston. This technological advancement would revolutionize communication and have a profound impact on the modern world.

3. September 5, 1882, marked the first official Labor Day celebration in Massachusetts. The holiday had been established by the New York Central Labor Union the previous year and quickly gained popularity across the country as a way to recognize and honor the contributions of working people.

4. On September 5, 1914, the Boston Braves defeated the Philadelphia Phillies 5-0 to begin a historic 20-game winning streak that would carry them to the National League Championship and ultimately the World Series title. The team, led by pitcher "Iron Man" Joe Wood and catcher Hank Gowdy, remains one of the most celebrated in Boston's sports history.

5. In 2018, Massachusetts became the first state to set a legal minimum age for purchasing tobacco products at 21. The new law, which took effect on September 5 of that year, was designed to reduce smoking rates and improve public health, particularly among young people.