The term functions as a noun phrase. In this construction, "greeting" is the head noun, which is the core subject. The phrase "September 11th" acts as a compound adjectival modifier, specifying the type or occasion of the greeting. Its grammatical role is to name a specific category of communication.
Linguistically, an adjectival modifier provides descriptive information about a noun, answering questions such as "which one?" or "what kind?" Here, "September 11th" modifies "greeting" to designate a salutation or message specifically related to the anniversary of the 2001 terrorist attacks. The term is notable for its semantic dissonance, as "greeting" typically connotes positive or celebratory sentiment, while the date signifies a solemn occasion of national mourning and remembrance.
In practical application, the phrase refers not to a celebratory message but to a communication of solemn remembrance, patriotism, or condolence. Such expressions are intended to honor the victims, recognize the sacrifices of first responders, and reflect on the historical impact of the events. Therefore, while its grammatical structure is that of a noun phrase, its functional meaning is commemorative and reflective, distinct from the conventional use of the word "greeting."
