The Hindi phrase "11 sep ki tithi" functions grammatically as a noun phrase. Its literal English translation is "the date of September 11th." In this construction, the head noun is "tithi" (date), which is modified by the preceding genitive element "11 sep ki" (of September 11th) to specify a particular day.
A structural analysis of its components clarifies its function. "11 sep" is a proper noun identifying the specific day. The particle "ki" is a postposition that indicates the genitive case, equivalent to the English preposition "of" or the possessive suffix "'s," thereby linking the date to the noun that follows. The noun "tithi" translates to "date." While "tithi" has a precise meaning as a lunar day in the Hindu lunisolar calendar (Panchang), in this common usage, it is employed more broadly to refer to a date in the Gregorian calendar.
As a noun phrase, its primary application is to name and refer to the specific date as a singular concept, allowing it to serve as the subject or object in a sentence. This grammatical function is crucial for its use as a keyword, as it establishes "the date of September 11th" as the central topic or main point of discussion for an article or analysis.
