The Battle of Lexington. .On April 17, 1775 the American Revolutionary War began with the rides of Paul Revere and William Dawes on April 17 and the battles of Lexington and Concord the following day.
It was the 17th, people get this wrong because of the poem, the date of the 17th didn't woke for Longfellow, he took liberties, since at the time it wasn't a well known story.
https://www.allenisd.org/cms/lib8/TX01001197/Centricity/Domain/1919/the%20Real%20Story%20of%20Paul%20Revere.pdf
Kek! triggered!