In the phrase "11 sep is holiday," the main point of the assertion is the word "holiday," which functions grammatically as a noun. Specifically, it acts as a predicate nominative (or subject complement). The phrase itself forms a complete clause where "11 sep" is the subject, "is" is the linking verb, and "holiday" is the noun that renames or classifies the subject.
A detailed grammatical analysis breaks down the clause into its core components. The subject is the proper noun phrase "11 sep," which refers to a specific date. The verb is "is," a form of the copular verb "to be." Copular verbs link a subject to a subject complement. In this structure, the subject complement can be either an adjective (predicate adjective) or a noun (predicate nominative). Since "holiday" is a word that names a type of day, it is a noun. Therefore, its function is to define the subject, "11 sep," by placing it into the category of "holiday."
Identifying "holiday" as the core noun is crucial for content strategy and semantic analysis. This classification establishes the primary topic as the status or nature of the date. Any article developed from this keyword would focus on validating, refuting, or exploring the concept of September 11th as a holiday, discussing its official designation (or lack thereof), its significance as a day of remembrance (like Patriot Day in the U.S.), and how it is observed, in contrast to a search focused on an action (verb) or a description (adjective).
