The core subject of the query is "Patriots' Day," which functions as a proper noun. This noun identifies a specific American civic holiday. The primary celebrants are the residents and governments of the U.S. states where it is an official public holiday, with participation from a broader national and international audience in specific events.
The holiday is officially observed in Massachusetts and Maine, where it is a legal public holiday. Wisconsin also recognizes it as a public school observance day. The date is fixed as the third Monday in April; for the year 2025, this falls on April 21. This regional concentration is historically significant, as the holiday commemorates the anniversary of the Battles of Lexington and Concord, the first armed conflicts of the American Revolutionary War, which occurred in Massachusetts on April 19, 1775.
Beyond state residents, the scope of "who celebrates" is broadened by major associated events. The Boston Marathon, held on this day, attracts an international assembly of athletes and spectators. Historical reenactments in towns like Concord and Lexington are a focal point for historical societies, participants, and tourists. A traditional morning Boston Red Sox baseball game at Fenway Park also involves a large audience of sports fans. Thus, the celebrants encompass state citizens observing a public holiday, as well as a diverse group of athletes, historical enthusiasts, and spectators.
