High Quality Content by WIKIPEDIA articles! Patriots' Day (sometimes incorrectly punctuated Patriot's Day or Patriots Day) is a civic holiday commemorating the anniversary of the Battles of Lexington and Concord, the first battles of the American Revolutionary War. It is observed in the Commonwealth of Massachusetts and state of Maine (once part of Massachusetts), and is a public school observance day in Wisconsin. Observances and re-enactments of these first battles of the American Revolution ...