The keyword term "patriot day post" functions as a noun phrase. The main point, or head of the phrase, is the word "post," which is a noun. The term "Patriot Day" acts as a modifier.
In this construction, "Patriot Day" is a proper noun functioning as a noun adjunct (or attributive noun). It modifies the head noun "post" by specifying its subject matter or occasion. This grammatical structure is common in English, where one noun is used to describe another (e.g., "kitchen counter," "business meeting"). The entire phrase refers to a specific entity: a piece of content (like a blog entry, social media update, or article) created in observance of or related to Patriot Day.
Determining that "post" is the core noun is crucial because it defines the subject of the article. The focus is not on the holiday "Patriot Day" in general, but specifically on the content or communication created for it. Therefore, the article's main point should revolve around analyzing, creating, or providing examples of such posts.