1. February 23, 1775: The Massachusetts Provincial Congress takes steps towards forming a state army by adopting an address to the colonists of British America.

2. February 23, 1836: The steamship Massachusetts sets sail on its maiden voyage from Boston to Liverpool, England, becoming the first steamship to make the transatlantic trip.

3. February 23, 1865: The Massachusetts legislature approves an amendment to the state constitution prohibiting slavery and involuntary servitude.

4. February 23, 1917: Massachusetts becomes the first state in the nation to establish a minimum wage law, requiring employers to pay at least $0.54 per hour.

5. February 23, 1969: The Boston Celtics retire the jersey of Bill Russell, one of the greatest basketball players in history, who led the team to 11 NBA championships during his career.