The keyword term functions grammatically as an interrogative clause, a type of sentence that asks a direct question. However, when used as a search query or article topic, it is treated as a nominal clause or a complex noun phrase. In this context, the entire phrase represents a single concept: the inquiry into the specific date of the event. It is composed of an interrogative adverb ("when"), a verb ("is"), and a compound proper noun modified by location and year ("Patriots' Day Boston 2025").
Patriots' Day is a state holiday observed in Massachusetts and Maine on the third Monday of April. To determine the date for 2025, one must identify the third Monday of that month. In 2025, the first Monday of April is April 7, the second is April 14, and the third is April 21. Therefore, the holiday will be observed on Monday, April 21, 2025.
The practical application of this date is significant for scheduling and public awareness, as it dictates the timing of major civic and sporting events. This state holiday commemorates the Battles of Lexington and Concord, the first armed conflicts of the American Revolutionary War. The date is most famously associated with the running of the Boston Marathon, which is traditionally held on this day; the 2025 event will be the 129th iteration of the race.
