The keyword phrase "september 11th national day of service and remembrance" functions grammatically as a proper noun. It operates as a single, cohesive noun phrase that serves as the official title for a specific day of observance. The core of the phrase is the noun "day," which is modified by the surrounding words to create a unique and formal name.
A detailed grammatical analysis reveals that the head noun is "day." This noun is pre-modified by the adjectives "September 11th" (acting as an adjectival phrase specifying the date) and "national." It is post-modified by the prepositional phrase "of service and remembrance," which itself contains the compound noun object "service and remembrance." All of these modifiers work together to specify and define the head noun, creating a complex but singular naming unit recognized as the official designation for the commemoration.
In practical application for writing, understanding this phrase as a proper noun is essential for correct syntax. It can be used in a sentence just as any other noun, serving as a subject, direct object, or object of a preposition. For instance, it can be the subject of a verb (e.g., "[The day] encourages volunteerism.") or the object of a preposition (e.g., "Many events are held in observance of [the day]."). This classification dictates its role within sentence structure, ensuring clarity and grammatical accuracy in the article.
