Marathon Monday isn’t like what you saw on the news. It’s one of those days when everything feels lighter. The whole city comes alive with things to celebrate: the runners, the Red Sox, the city, the way the sun feels on shoulders that spent all winter beneath a coat. But the best part of it is the names. Some people have countries or organizations on their shirts, but most have their names. The thing to do on Marathon Monday is to stand at mile 21 and call them out. Cheer people on. Sometimes they look back at you and smile, or look a little more determined, or thank you. It’s humbling. The smiles and the thank yous are all very humbling, because they’re the superhumans running 26.2 miles, and you’re the one standing there calling out a name. But what you’re doing is still important. That’s what Marathon Monday is about. If you’re not running the race, you stand by and support the ones who are. There’s always something good to do.