The keyword term "Patriots Day of Manipur" functions grammatically as a proper noun phrase. It operates as a single conceptual unit to name a specific, unique commemorative day.
The core of this phrase is the head noun "Day". It is modified by "Patriots", which acts as a noun adjunct (a noun used as an adjective) to form the compound proper noun "Patriots Day". This specific name is further defined by the prepositional phrase "of Manipur", which acts as an adjectival phrase to specify which Patriots Day is being referenced, distinguishing it from other similarly named events.
Because it functions as a proper noun, this entire phrase is treated as the name of a specific entity. In sentence construction, it can act as a subject, a direct object, or the object of a preposition. Its status as a proper noun requires capitalization to indicate that it refers to a formal title rather than a generic description.
