The core term of the query, "Patriots' Day," functions as a proper noun, identifying a specific legal holiday. The determination of its date follows a statutory rule rather than a fixed calendar day. In the states where it is officially observed (Massachusetts and Maine), Patriots' Day is designated as the third Monday in April.
To calculate the specific date for 2026, one must consult the calendar for that year. April 2026 begins on a Wednesday. The Mondays of that month are April 6, April 13, and April 20. Following the "third Monday" rule, the correct date is identified as the third of these occurrences. This holiday commemorates the anniversary of the Battles of Lexington and Concord, which occurred on April 19, 1775, marking the start of the American Revolutionary War.
Therefore, in 2026, Patriots' Day will be observed on Monday, April 20. This date is of particular significance as it is also the day on which the Boston Marathon is traditionally run. The event is scheduled to coincide with the holiday, making it a central part of the day's observances and activities in the Boston metropolitan area.
