For one day, 12 parking spaces at the Williamsburg at Dunwoody shopping center will be transformed into a lively pop-up park designed for residents and visitors to relax, play and connect for free. Dunwoody’s first-ever Park(ing) Day on Friday, Sept. 18, from 10 a.m. to 6 p.m. will feature arts and crafts — including make-your-own flower bouquets — as well as yard games for all ages and complimentary ice cream.