The term is a noun phrase. In this construction, the head noun, which establishes the primary subject, is "year." The proper noun "Patriot Day" functions as a noun adjunct, which is a type of adjectival modifier. Therefore, the main point of focus is the concept of a "year," which is being specified or defined by its connection to the observance of Patriot Day.
The grammatical structure indicates that the topic is not Patriot Day in general, but rather a specific temporal period or a particular annual iteration associated with it. The modifier "Patriot Day" qualifies the noun "year," narrowing its scope. This directs analysis toward a specific calendar year's observance, an anniversary year (e.g., the 20th anniversary year), or a year-long period framed by the commemoration. The phrase isolates a specific timeframe for discussion, rather than the abstract concept of the day itself.
For an article, this grammatical function is critical because it mandates that the central theme must be the year-specific context. The content should focus on events, developments, or analyses pertinent to that designated annual period. An article based on this keyword would explore what happened during a particular "Patriot Day year," compare different years, or analyze trends across years, rather than simply defining or describing the observance itself.
