The keyword phrase functions as a proper noun phrase. It acts as a single, specific identifier for an event, topic, or entity. In this construction, "blue jays" serves as the head noun, which is the core subject. The date, "september 11 2025," operates as a postpositive adjectival modifier, specifying a particular instance or context related to the head noun.
Grammatically, a date typically functions as an adverbial phrase of time, answering the question "when?" (e.g., "The game was played on September 11, 2025"). However, within this keyword structure, the date's role shifts to that of a modifier, similar to how a noun can act as an adjective in a compound noun or noun adjunct construction (e.g., "baseball game"). Here, the date phrase modifies "blue jays" by narrowing its scope from the general team or species to a specific event associated with that exact day. This linguistic structure is common in search queries and titles where the goal is to pinpoint a singular, time-bound subject.
The practical application of this analysis is that the article's main point must be the specific event or information tied to the subject on that date. By treating the entire phrase as a proper noun, the content should focus on what happened, is scheduled to happen, or is otherwise relevant to the Blue Jays on September 11, 2025. This ensures the article directly addresses the precise entity named by the keyword, thereby satisfying the user's specific informational need rather than discussing the team or the date in general terms.