The term "september 11th date" functions as a noun phrase. In this construction, "date" is the head noun, which is the core component of the phrase. The words "September 11th" act collectively as an adjectival modifier, specifying which particular date is being referenced.
Grammatically, the modifier "September 11th" is a compound unit composed of a proper noun ("September") and an ordinal number ("11th"). Nouns are frequently used attributively in English to modify other nouns, and in this case, "September" specifies the month. This entire adjectival phrase ("September 11th") modifies the head noun ("date") to create a single, specific conceptual unit. While "September 11th" can stand alone as a proper noun referring to a specific set of historical events, its function within this particular phrase is strictly adjectival.
Identifying the term as a noun phrase is crucial for its application in writing. It dictates that the phrase can serve as a subject, object, or object of a preposition within a sentence. For instance, it can be the subject ("The September 11th date marks a pivotal moment..."), the direct object ("Historians analyze the September 11th date..."), or follow a preposition ("...in the context of the September 11th date."). This grammatical understanding allows for the precise and correct integration of the keyword into sentences, ensuring the article focuses specifically on the concept of the date itself.
