The keyword phrase "Patriots Day 2025 Massachusetts" functions grammatically as a proper noun phrase. This is because it names a specific, unique entity: a particular observance of a holiday ("Patriots Day") occurring in a specific year ("2025") and a specific location ("Massachusetts"). Each component works to identify a singular, capitalized subject rather than a general concept.
In this construction, the core proper noun is "Patriots Day." The terms "2025" and "Massachusetts" act as modifiers that specify which instance of the holiday is being discussed. "Massachusetts" functions as an adjectival noun, or a noun adjunct, clarifying the location, while "2025" is a numeral that pinpoints the time. Together, they form a single cohesive unit that serves the same grammatical role as a simple proper noun like "Boston" or "John Adams." The phrase does not express an action (verb) or describe another noun (adjective), but rather names the topic itself.
Understanding this classification is critical for article construction because a noun phrase typically serves as the subject or object within a sentence. This allows the keyword to be the central focus around which clauses are built. For example, it can be the subject ("Patriots Day 2025 Massachusetts will include the Boston Marathon.") or the object of a verb or preposition ("The state is planning for Patriots Day 2025 Massachusetts."). Treating the phrase as a singular noun ensures grammatical integrity and clarity throughout the text.
