Some of the people at our holiday tables share no last name and no family tree with us. They live next door, across the hall, or two cubicles down, and at some point they stopped being “the neighbor” and became family. These 10 stories are about that kind of friendship: a retired teacher who became a grandparent to kids who weren’t hers, a coworker with an old Corolla, a Thursday dinner that’s lasted nine years. It’s everyday kindness, and the happiness that comes with it.