The main point of the keyword phrase "september 11 a holiday" is the word "holiday," which functions as a noun. In this construction, "holiday" acts as a predicate nominative or an appositive that renames and defines the subject, "September 11."
Grammatically, the phrase implies a complete sentence: "September 11 [is] a holiday." The noun "holiday" follows the implied linking verb ("is") and equates to, or provides the identity of, the proper noun "September 11." This structure establishes that the central topic is not the date itself, but its classification. The focus is on the concept named by the noun: a day of festivity or recreation when no work is done.
Therefore, any article centered on this keyword must address the noun "holiday" as its core subject. The article's purpose would be to argue for or against the classification of September 11 using the definition of that noun, exploring its legal status (Patriot Day is a National Day of Service and Remembrance, not a federal holiday) and cultural significance in the context of what constitutes a holiday.
