Original reporting by Lucy Bennett. Giant Food Stores is celebrating its 90th anniversary on Friday. The grocery chain inviting customers and community members to join them for free cake and apple slices from 11 a.m. to 1 p.m. and 4 to 6 p.m. The cake and apple slices will be available while supplies last. “Our valued customers are the reason we have been able to achieve this 90 year milestone of providing quality, selection and service,” said Rick Herring, president in a press release. Giant/Martin’s is headquartered in Central Pennsylvania, in Carlisle, with nearly 200 grocery stores in Pennsylvania, Maryland, Virginia and West Virginia.