PATRIOTS' Day is a celebration of the battles of Lexington and Concord, which took place near Boston in 1775.
The holiday, which lands on the third Monday in April, is observed in multiple states - including Massachusetts.
Are liquor stores open on Patriots’ Day in Massachusetts?
Patriots' Day is a state holiday in Massachusetts, but it is not a national holiday.
It's a day for celebrations, and while some businesses are closed, liquor stores keep their doors open on Patriots' Day.
Most banks and post offices also remain open.
"Stores and other businesses and organizations may be open or closed according to local custom," according to TimeAndDate.com.
"Most public transit services run to reduced schedules, but may not operate in rural areas.
"There may be some local disruption to traffic around the re-enactments and sports events, particularly in Boston."
It is a day to celebrate a pair of historic moments that took place during the American Revolution.
"In the area around Lexington and Concord, re-enactments of the battles in 1775 and the events leading up to them are held," according to TimeAndDate.com.
"A particular highlight is the opportunity to ring the bell that warned the local troops that British soldiers were approaching."
The Boston Red Sox usually play a morning home game on Patriots' Day - which falls on April 19 in 2021. They host the Chicago White Sox.
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The Boston Marathon, first run in 1897, is held on Patriots' Day every year, but is scheduled to be held on October 11 in 2021 due to the ongoing coronavirus pandemic.
"Participants in the in-person race may be expected to produce up to two negative Covid-19 tests prior to Monday, October 11, regardless of vaccination status, in order to mitigate spread to participants and community members," organizers said.
The Boston Athletic Association "will continue to follow the data and science and will share more information in the coming months on testing timelines and requirements."