The keyword phrase "patriots day original date" functions as a noun phrase. It collectively refers to a specific piece of information: the initial fixed calendar day upon which Patriots' Day was historically observed. The original date for Patriots' Day is April 19th.
This date was specifically chosen to commemorate the Battles of Lexington and Concord, which took place on April 19, 1775, marking the commencement of the American Revolutionary War. While the historical event occurred on a fixed calendar date, its modern observance, particularly in Massachusetts and Maine, shifted to the third Monday in April. This alteration was made to create a consistent three-day weekend, aligning with the principles of the Uniform Monday Holiday Act, though Patriots' Day itself remains a state holiday rather than a federal one.
Therefore, while the official observance varies by year due to its placement on a Monday, April 19th retains its significance as the foundational historical date directly linked to the pivotal events Patriots' Day was established to remember and honor.