The keyword phrase is an interrogative sentence in Hindi. The core of the query is built around the noun "holiday," which is the subject of inquiry. "11 september" functions as a proper noun phrase specifying a date, acting as a temporal adverbial. The particle "kya" transforms the declarative statement into a question, seeking confirmation or denial of the date's status as a holiday. The grammatical structure, therefore, is a direct inquiry about the classification of a specific date.
In India, September 11 is not a public, gazetted, or restricted holiday; it is a standard working day. Globally, the date holds significant historical importance due to the terrorist attacks that occurred in the United States on September 11, 2001. In the U.S., it is observed as Patriot Day and a National Day of Service and Remembrance. However, it is a day of observance, not a federal public holiday, meaning schools and businesses generally remain open.
The inquiry stems from the date's high profile in global events, which can lead to confusion about its official status. It is crucial to distinguish between a day of remembrance, which serves to commemorate a significant event, and a public holiday, which is a non-working day formally sanctioned by a government. For official holiday status in any specific region or country, consultation with that jurisdiction's official government calendar is necessary, as such designations are determined by national or state-level authorities.