Patriots' Day[pāˈtrē-əts, -ŏtsˌ]
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The third Monday in April, a holiday in Maine and Massachusetts commemorating the battles of Lexington and Concord in 1775, which began the American Revolution.