Walmart is typically open on Christmas Eve until a certain time, usually closing in the afternoon or early evening. The specific hours of operation can vary depending on the location, so it's best to check with your local Walmart for their holiday hours. However, many Walmart stores remain open late into the night to accommodate last-minute shoppers. Keep in mind that some departments or services may have different hours than the store itself, so be sure to check in advance to avoid any surprises.