It’s crazy how few of us know our neighbors: their names, their phone numbers, what they’re about. The explosion of online "social" networking has only made it easier to avoid face-to-face contact in the real world. What might we be missing? Collaborators, friends, emergency contacts, sugar? What does this mean for society? As Harvey Milk said, "If we wish to rebuild our cities, we must first rebuild our neighborhoods." So, let's do something about it. On April 27, we invite you to celebrate Neighborday. Whether it's as simple as summoning the courage to ask the guy in apartment 3B what is name is…again, or as ambitious as coordinating a full-fledged block party replete with a mariachi band, bouncy castle, and street hockey tournament… Click "DO IT," and we'll give you everything you need to make it happen. For more Neighboring inspiration, follow along at good.is/neighboring.