1. Armistice Day: November 11 is celebrated as Armistice Day in Massachusetts to commemorate the end of World War I on this day in 1918. It marks the day when the Allies and Germany signed a ceasefire agreement, ending the fighting in the war.

2. Veterans Day: In 1954, Armistice Day was officially changed to Veterans Day to honor all veterans who have served in the military. Massachusetts is home to many military bases, including Hanscom Air Force Base and Fort Devens, which have contributed significantly to the state's history.

3. Boston Massacre: In 1770, on the evening of November 11, an altercation between British soldiers and colonists in Boston led to the infamous Boston Massacre. The event is considered a precursor to the American Revolution and sparked outrage throughout the colonies.

4. First Thanksgiving: The first recorded Thanksgiving celebration in the United States was held in Plymouth, Massachusetts, on November 11, 1621. The Pilgrims and Wampanoag Indians gathered to give thanks for the successful harvest season.

5. Suffrage Victory: In 1915, Massachusetts became the eighth state to grant women the right to vote in local and state elections. This paved the way for the passage of the 19th Amendment in 1920, which granted women across the country the right to vote. November 11, therefore, holds significant importance in the history of women's suffrage in the state of Massachusetts.