A.K.A. Patriots' Day (U.S.)
Ever heard of the “midnight ride of Paul Revere”? Well, it started on the evening of April 18, 1775. Today riders in Massachusetts will reenact this famous event—the 234th such reenactment!—with one horseman playing Paul Revere riding from Boston to Lexington, and another playing William Dawes riding from Roxbury to Lexington.
Notice that today's reenactment will in fact be day rides, unlike the original nighttime rides. Also, the Boston Marathon is run on Patriot's Day, so today is also called Marathon Monday.
Happy running, riding, and spectating to all the citizens of Boston and environs!
Here are some links for the rest of us:
Watch a short video that explains why Paul Revere and William Dawes made their ride.
Read an account of the ride in Revere's own words.
Explore a virtual museum on Paul Revere's ride.