The keyword term functions as a proper noun phrase. It operates as a single grammatical unit to name a specific, unique event, distinguishing it from general or common nouns which refer to a class of entities (e.g., "a parade").
This phrase is constructed around the central or "head" noun, which is "parade." The other components act as modifiers to specify this noun. "Tierrasanta" and "Patriots Day" are both proper nouns serving as attributive nouns (or noun adjuncts), indicating the location and thematic occasion of the parade, respectively. The numeral "2025" is a post-nominal modifier that specifies the exact temporal instance of the event.
Understanding this grammatical classification is crucial because it dictates how the phrase is used within a sentence. As a singular entity, it can serve as a subject, a direct object, or an object of a preposition. This ensures syntactic correctness and semantic clarity, allowing search engines and readers to recognize the term as an identifier for a distinct event, which is fundamental for effective content strategy and information retrieval.
