1. Evacuation Day: March 17, 1776, is celebrated as Evacuation Day in Massachusetts. This commemorates the day when the British evacuated Boston, ending an 11-month siege by American forces that included the Battle of Bunker Hill.

2. St. Patrick's Day: March 17th is also celebrated as St. Patrick's Day, a holiday that honors Ireland's patron saint. Boston has the largest St. Patrick's Day parade in New England, and the holiday is celebrated with parades, parties, and traditional Irish fare.

3. Irish Immigration: March 17th has special significance for Massachusetts, as it marks the day that many Irish immigrants came to the state in search of a better life. Irish immigrants played a significant role in shaping Boston's culture and economy.

4. Prohibition ends: March 17th, 1933, is the day that Prohibition officially ended in Massachusetts. The 18th Amendment to the U.S. Constitution, which banned the manufacture, sale, and transportation of alcohol, was repealed by the 21st Amendment.

5. Boston Marathon: The Boston Marathon is held annually on Patriots' Day, which falls on the third Monday in April, but the race has special ties to March 17th. In 1901, the first American winner of the Boston Marathon, John J. McDermott, crossed the finish line on March 17th.