The keyword phrase "September 11th National Day" functions as a noun phrase. The main point or head of this phrase is the word "Day," which is a noun. This determination is based on its grammatical structure, where it names a specific entity or concept.
In a grammatical analysis, "Day" serves as the core noun. The other words in the phrase act as modifiers to specify which day is being referenced. "National" is an adjective describing the scope of the day. "September 11th" functions as an adjectival modifier (specifically, a noun adjunct or part of a compound) that pinpoints the exact date. The entire construction identifies a singular, specific occasion, making its primary grammatical function that of a noun.
Identifying the main point as a noun is crucial because it establishes the keyword as the central subject of the article. As a noun phrase, it can act as the subject or object in sentences, allowing the article to be built around defining, describing, and discussing this specific event. All content will relate back to this central conceptthe day itself.
