The holiday was originally celebrated on April 19, the actual anniversary of the battles (fought in 1775). Since 1969, it has been observed on the third Monday in April in Massachusetts and in Maine (which until the Missouri Compromise of 1820 was part of Massachusetts). The Monday holiday creates a three-day long weekend. It is also the first day of a vacation week for public schools in both states and a school holiday for many local colleges and universities, both public and private.