The keyword term "patriots day calendar" functions as a noun phrase. The main part of speech, which serves as the grammatical head of the phrase, is the noun "calendar". The proper noun "Patriots Day" acts as a noun adjunct, modifying "calendar" to specify its type or theme.
In this construction, "Patriots Day" performs an adjectival role, describing the noun that follows it. This is a common grammatical pattern where a noun is used to modify another noun, similar to phrases like "computer screen" or "holiday schedule." The function is to narrow the definition of "calendar" from a general object to one specifically associated with the events, dates, or observance of Patriots' Day.
For the purpose of an article, the central subject is the tangible or conceptual "calendar." The focus would be on a schedule, a list of events, or a date-keeping tool related to the holiday, rather than an abstract discussion of the holiday itself. Identifying "calendar" as the core noun is crucial for correctly framing the article's topic and ensuring the content is relevant to a user searching for specific date-related information.
