The keyword term "patriots day holiday september 11" functions grammatically as a noun phrase. Its purpose is to act as a single unit that names a specific concept or entity: the observance on September 11 known as Patriot Day. In this construction, the individual words are compounded to create a specific identifier for the subject of the article.
This noun phrase is composed of several nouns acting together. "Patriot Day" is a proper noun, "holiday" is a common noun, and "September 11" is a proper noun specifying a date. In English syntax, nouns can function as attributive nouns (or noun adjuncts) to modify other nouns. Here, "Patriot Day" and "September 11" modify the core noun "holiday," specifying exactly which one is the topic. It is important to distinguish this observance from Patriots' Day, a regional holiday in some U.S. states in April. Patriot Day is a national day of remembrance established in memory of those killed in the September 11, 2001 terrorist attacks.
Understanding the term as a noun phrase is critical as it defines the article's subject. The content should focus on defining and describing this entityits origin, meaning, and associated traditions. The grammatical function dictates an expository approach, centered on the "what" and "why" of this specific day of observance, rather than on an action (verb) or a quality (adjective). This establishes the topic as a distinct subject for discussion and analysis.