Patriots' Day is a state holiday in Massachusetts, not a federal holiday. The central distinction lies in the adjective "federal," which designates a holiday established by U.S. federal law and observed by federal government institutions nationwide. In contrast, Patriots' Day is a public holiday created by Massachusetts state law, and its observance is confined to the state's jurisdiction and a few other specific states.
A federal holiday, such as Independence Day or Thanksgiving, results in the nationwide closure of non-essential federal government offices, services (including the U.S. Postal Service), and federally chartered banks. Patriots' Day, observed on the third Monday in April, does not trigger such a nationwide closure. While state, county, and municipal offices in Massachusetts close, federal institutions within the state, like federal courts and post offices, remain open for business. The holiday specifically commemorates the Battles of Lexington and Concord, the first armed conflicts of the American Revolutionary War. It is also an official state holiday in Maine and has been recognized in different capacities in Connecticut and Wisconsin.
The practical application of this distinction is significant. Individuals and businesses must recognize that while state-level services and many local companies in Massachusetts cease operations for the day, all federal functions and transactions continue as normal. Therefore, the classification of the observance as a "state holiday" rather than a "federal holiday" is a crucial legal and operational fact, defining which government services and commercial activities are affected.