The keyword phrase functions as a proper noun or, more broadly, a noun phrase. It designates a specific, unique entitya particular calendar date that integrates the Gregorian date with a term from the Javanese calendar system. As a noun, it can serve as the subject or object within a sentence.
Grammatically, the phrase is a compound unit. "11 September 2025" is itself a noun phrase that specifies a point in time. The word "Jawa" acts as a postpositive modifier, clarifying that this date is being considered within the context of the Javanese calendar (penanggalan Jawa). This structure is analogous to other proper nouns for specific days, such as "Easter Sunday" or "Election Day 2024," where a general term is made specific. The entire phrase operates as a single conceptual unit identifying one unique day.
Understanding this grammatical function is crucial for article construction. As a noun phrase, it can be the central topic that is defined, analyzed, or discussed. For instance, it can be the subject of a verb ("11 September 2025 Jawa holds cultural significance...") or the object of a preposition ("The focus of this analysis is on 11 September 2025 Jawa."). This grammatical role allows it to be the main point around which all related descriptions, events, and interpretations are structured.
