The keyword phrase "National Patriots' Day Quebec" functions grammatically as a proper noun. While composed of individual words with different parts of speech (adjective, possessive noun, noun), the collective term operates as a single nominal unit that names a specific, official statutory holiday. The core of the phrase is the noun "Day," which is modified by the preceding words and specified by the concluding noun "Quebec."
Analyzing the components, "National" is an adjective, and "Patriots'" is a possessive noun, both modifying "Day." The entire unit "National Patriots' Day" is the formal title of the holiday. The word "Quebec" acts as a noun adjunct or a postpositive modifier, clarifying the specific jurisdiction in which this holiday is observed. This distinguishes it from other holidays with similar names, such as Patriots' Day in some U.S. states. The capitalization of the primary words is a key indicator of its status as a proper noun, referencing a unique entity rather than a general concept.
Recognizing the phrase as a proper noun is crucial for its correct application. It ensures the term is understood not as a descriptive phrase but as the official designation for the Quebec holiday held on the Monday preceding May 25th. This holiday commemorates the rebellions of 18371838, and its grammatical classification as a proper noun reflects its distinct legal and cultural status within the province.