It is not possible to determine which grocery stores are open tomorrow without additional information such as the date and location. However, the search results provide information on grocery stores that are open on specific holidays such as Memorial Day, Easter Sunday, and July 4th. Some of the grocery stores that are open during these holidays include Food Lion, Giant Food, Harris Teeter, H-E-B, Lidl, Price Chopper, Publix, Safeway, Sams Club, Shaw's, ShopRite, Stop & Shop, Target, The Fresh Market, Trader Joe's, Tops Friendly Markets, and Whole Foods Market. It is important to note that store hours may vary by location, so it is recommended to check the local store hours before visiting. Additionally, it is recommended to check the store's website or call the store directly for the most up-to-date information on store hours.