In 2025, Patriots' Day in Massachusetts will be observed on Monday, April 21. The key component of the query is the proper noun "Patriots' Day," which identifies a specific state-level civic holiday. This official holiday, recognized in Massachusetts and Maine, commemorates the anniversary of the first battles of the American Revolutionary War.
The date of the observance is determined by state law, which mandates that Patriots' Day falls on the third Monday in April. This system was established to create a three-day weekend and may not coincide with the actual historical date of the events, which occurred on April 19, 1775. The holiday specifically honors the Battles of Lexington and Concord, the initial armed conflicts that marked the start of the war.
Practically, this date is significant as it is when the Boston Marathon is traditionally held. As a public holiday in Massachusetts, it results in the closure of state, county, and some municipal offices, as well as public schools and many private businesses. Consequently, all activities, events, and closures related to the holiday in 2025 will be centered on April 21st.