In 2025, Patriots' Day will be observed on Monday, April 21.
The date of Patriots' Day is determined by its observance on the third Monday in April. This official state holiday in Massachusetts and Maine commemorates the anniversary of the Battles of Lexington and Concord, the first armed conflicts of the American Revolutionary War, which took place on April 19, 1775. The legislative decision to fix the holiday to a specific Monday, rather than the historical date of April 19, was made to create a three-day weekend.
A significant practical application of this schedule is the running of the Boston Marathon. This historic athletic event is traditionally held on Patriots' Day each year. Consequently, the 129th Boston Marathon is scheduled to be run on Monday, April 21, 2025, aligning with the holiday observance.
