For many Bostonians, Patriots' Day marks the unofficial beginning of spring. But of course, as Charles Sennott, head of The GroundTruth Project, points out, it's also much more than that.

"The history of it is something that's a great pride of Boston," Sennott said. 

A symbol of resilience for decades, the marathon in Boston was one of the few national events that carried through both World War One and World War Two (along with the Kentucky Derby, the Rose Parade, and the Westminster Dog Show.) 

"This is something that, even when we're challenged as we were with the horrific bombings two years ago and we think about 'Boston Strong,' it's been 'Boston Strong' for a really long time," Sennott said. "I love that."

To hear more from Charles Sennott, tune in to Boston Public Radio above.