I’ve just come back from the most marvelously jubilant scene — “The Great Jack O’Lantern Blaze” at Van Cortland Manor in Croton-on-Hudson. It’s a truly breathtaking display of wildly carved pumpkins lit up with candles from the inside and gathered in a critical mass along a walking path through a pastoral estate (and behind a Stop & Shop, as my son noted). Although it was obviously representative of Halloween, the light it generated felt more like a universally celebratory ex