UpdatedWed, Jun 9, 2021 at 10:50 am ET Reply The first 100 customers in line will get a free "Wawa Delco" t-shirt. (Wawa) UPPER DARBY, PA — The "Mare of Easttown" craze hasn't died down yet, as the "mythical" Wawa is holding a "Mare of Easttown" day at a new Delaware County store's opening Thursday. The new Wawa, located at 418 W. Baltimore Pike in Upper Darby, is slated to open at 8 a.m. Thursday and the event will be "Mare of Easttown" themed. The first 100 customers in line will be given a free "Wawa Delco" T-shirt. Free coffee will also be offered at the event.