The entire phrase functions as an adverbial phrase of time. Its grammatical purpose is to modify a verb, an adjective, or an adverb by specifying a future point in time that is calculated relative to the present moment. It answers the question "When?".
This phrase is composed of two main components. "11 September 2025" is a noun phrase that acts as a proper noun, identifying a specific calendar date. This is post-modified by the prepositional phrase "from today," where "from" is a preposition establishing a point of origin and "today" is an adverb serving as the object of the preposition. The complete construction defines a temporal relationship between a fixed future date and the current day.
In application, this adverbial phrase establishes a precise, calculated temporal context for an action or state within a sentence. For example, in the statement, "The final report is due [on the date specified]," the phrase modifies the verb "is due" by providing a definitive future deadline. Its core function is to act as a temporal locator, fixing an event to a specific point in the future.
