The keyword term "patriot day 2016" functions as a proper noun. It operates as a single, cohesive unit to name a specific, unique event: the observance of Patriot Day in the particular year of 2016. As a proper noun, it is the subject or main point of the article.
Grammatically, the phrase is a noun phrase. The core of this phrase is the proper noun "Patriot Day," which is the official name of the U.S. observance. The numeral "2016" functions as an adjective, specifically a postpositive adjective, modifying "Patriot Day." It specifies which iteration of the annual event is the focus. The combination of the proper noun and the adjectival numeral creates a more specific proper noun that identifies a singular, non-repeatable historical point in time.
Understanding this classification is critical because it establishes the phrase as the central subject of the article. By identifying "patriot day 2016" as a proper noun, all content within the article should relate directly to this specific subject, treating it as the main point around which all facts, descriptions, and analyses are built. This ensures grammatical and thematic coherence, as the article is fundamentally about a specific named event, not a general concept or an action.
