The keyword phrase "Patriot Day or September 11th" functions grammatically as a compound proper noun. It acts as a single unit to name a specific, unique entity: a day of national observance in the United States.
This determination is based on the components of the phrase. "Patriot Day" is a proper noun, the official name of the observance. Likewise, "September 11th" functions as a proper noun because it refers to a specific date imbued with unique historical significance, much like "the Fourth of July." The coordinating conjunction "or" links these two synonymous proper nouns, presenting them as alternative names for the same referent. The entire phrase operates as one nominal unit within a sentence, serving as a subject, object, or appositive.
Identifying the term as a noun is the central step for the article because it dictates that the subject matter is an entity to be defined, described, and explained. The article's purpose will be to elaborate on this specific dayits history, significance, and associated commemorationsrather than describing an action (verb) or a quality (adjective). Therefore, the main point of the article is the day itself.
