The main point of the keyword phrase "september 11 national holidays" is the noun "holidays". In this grammatical construction, "holidays" serves as the head noun, which is the central element being discussed. The preceding words, "September 11" and "national," function as modifiers that specify the type and context of these holidays.
A detailed grammatical analysis identifies "holidays" as the core noun. The term "national" is a descriptive adjective indicating the scope of the holidays (i.e., at a country-wide level). The phrase "September 11" is a proper noun acting as a noun adjunct or attributive noun, meaning it modifies the head noun by specifying the event or date to which the holidays are related. Together, they form a noun phrase where the primary subject is the concept of holidays, and the modifiers narrow the focus to those that are both national in character and connected to September 11.
This determination is crucial because it directs the article's focus. The central theme must be the holidays themselvestheir official status, history, purpose, and manner of observance. The article should not primarily be about the historical events of September 11, but rather about the act of national commemoration through the establishment or designation of holidays. Understanding "holidays" as the main subject ensures the content directly addresses the user's query about the commemorative observances, rather than the event itself.