Evacuation Day (Suffolk County, Massachusetts)

Evacuation Day is a holiday observed on March 17 in Suffolk County, Massachusetts, and also by the public schools in Somerville, Massachusetts. The holiday commemorates the evacuation of British forces from the city of Boston following the siege of Boston, early in the American Revolutionary War. Some schools and government offices may be closed. If March 17 falls on a weekend, schools and government offices may be closed on the following Monday in observance. It is the same day as Saint Patrick's Day, a coincidence that played a role in the establishment of the holiday.

Suffolk County is located in the Commonwealth of Massachusetts, in the United States. As of the 2020 census, the population was 797,936, making it the fourth-most populous county in Massachusetts. The county comprises the cities of Boston, Chelsea, and Revere, and the town of Winthrop. The traditional county seat is Boston, the state capital and the largest city in Massachusetts. The county government was abolished in 1999, resulting in Suffolk County now functioning only as an administrative subdivision of state government and a set of communities grouped together for some statistical purposes. Suffolk County is located at the core of the Boston-Cambridge-Newton, MA-NH Metropolitan Statistical Area as well as the greater Boston-Worcester-Providence, MA-RI-NH-CT Combined Statistical Area.