The term "us veterans day" functions grammatically as a proper noun. It is the specific name of a federal holiday in the United States.
In this three-word phrase, "Day" is the head noun. The words "US" (an abbreviation for United States) and "Veterans" both act as noun adjuncts or attributive nouns. A noun adjunct is a noun that modifies another noun, functioning like an adjective. "Veterans" specifies the type of day, and "US" specifies its national identity. Together, these components form a compound noun that names a unique, singular entity, which is the definition of a proper noun.
Recognizing the term as a proper noun is critical for correct usage. As a proper noun, it should be capitalized (U.S. Veterans Day) and treated as a single grammatical unit within a sentence. This classification dictates that it can serve as a subject, direct object, or object of a preposition, referring to the specific holiday itself rather than a general concept.
