The core of the keyword phrase is "Patriots Day," which functions as a proper noun. The word "real" is an adjective, used here to question the factual basis or authenticity of the holiday or events associated with it. The subject of the query is a legitimate, officially recognized holiday with a basis in historical events.
Patriots' Day is an official state holiday in Massachusetts and Maine, observed annually on the third Monday in April. It commemorates the Battles of Lexington and Concord, which took place on April 19, 1775, and marked the start of the American Revolutionary War. The query also frequently pertains to the 2016 film of the same name, which is a dramatization of the real events surrounding the 2013 Boston Marathon bombing and the subsequent manhunt for the perpetrators.
Therefore, the authenticity queried by the term is affirmed in two primary contexts. First, the holiday itself is a formal, legally recognized commemoration of a factual, pivotal event in United States history. Second, the modern cultural events associated with it, particularly the Boston Marathon and the tragic 2013 bombing depicted in media, are also based on well-documented reality.