The central component of the keyword term is "Patriots' Day," which functions as a proper noun. This noun is the subject of the inquiry. In 2026, Patriots' Day will be observed on Monday, April 20.
The date for this holiday is determined by a specific rule. Patriots' Day is a state holiday in Massachusetts and Maine, officially celebrated on the third Monday of April. This observance commemorates the anniversary of the Battles of Lexington and Concord, the first armed conflicts of the American Revolutionary War in 1775. To calculate the date for 2026, one identifies the Mondays in April: the first Monday is April 6, the second is April 13, and the third is consequently April 20.
As a practical matter, the observance of Patriots' Day on this date means state, county, and municipal government offices and public schools will be closed in Massachusetts and Maine. The most prominent event associated with the holiday is the Boston Marathon, which is traditionally run on Patriots' Day each year. Therefore, the 130th Boston Marathon is scheduled to take place on Monday, April 20, 2026.
