The keyword term "Patriots Day mass" functions as a noun phrase. The main point or head of the phrase is the noun "mass". The term "Patriots Day" acts as a noun adjunct, which is a noun used as an adjective to modify another noun. Therefore, the core subject is "mass," specified as one occurring on or in observance of Patriots' Day.
In this grammatical structure, "Patriots Day," a proper noun referring to the holiday, provides the specific context for the noun "mass." It answers the question, "Which mass?" The analysis identifies "mass" as the essential element and "Patriots Day" as the descriptive qualifier. In this context, "mass" almost certainly refers to a Eucharistic liturgy, a religious service in the Catholic Church. The phrase does not describe a day that is patriotic and massive, but rather a specific, singular event: a religious service connected to the holiday.
Understanding this grammatical relationship is crucial because it establishes the article's focus. The primary subject is a religious service. The article would therefore explore the details of this service: its location (e.g., the Cathedral of the Holy Cross in Boston), its significance, its history, who attends, and its connection to the civic themes of Patriots' Day. The keyword's structure dictates that the content centers on the event of the mass itself, framed by the occasion of the holiday.
