Atlanta's social calendar is gearing up for one of its signature sun-soaked events as Sundresses and Seersuckers returns this week, bringing a mix of style, service, and southern-city sophistication to the spring season. Source: Kerri Phox / Kerry Phox Now in its 15th iteration, the long-running ATL affair has evolved from a single Saturday gathering into a sprawling, four-day experience that blends Black social culture, intentional community-building, and philanthropic impact. Organized by the Delta Mu Mu Chapter of Omega Psi Phi Fraternity, Inc.