The keyword term "september 11 holiday name" functions as a noun phrase. The core word, or head, of this phrase is the noun "name." All preceding words act as modifiers to specify the type of name being discussed.
In this grammatical construction, "september 11" and "holiday" are used as noun adjuncts (or attributive nouns), which means they are nouns functioning as adjectives to modify the final noun, "name." "September 11" modifies "holiday" to specify which holiday, and the entire unit "september 11 holiday" then modifies "name." This structure pinpoints the subject not as the holiday itself, but specifically as the title or designation assigned to it.
Understanding this term as a noun phrase is crucial because it dictates that the article's primary focus must be on identifying, defining, or analyzing the specific label(s) used for the September 11th observance. The main point is not the event or the concept of the holiday, but the nomenclature, such as "Patriot Day" or "National Day of Service and Remembrance."
