Walmart stores restock on Fridays, Saturdays, and Sundays.
Walmart stores prioritize re-stocking shelves in order by importance to the customer experience: that is to say, they first restock items such as bread and milk. They then move on to frozen food, canned goods, vegetables/fruits/other produce, breakfast bar items (cereal), refrigerated foods (dairy products), beverages(soda pop) liquor/beer/wine (liquor) household care products like soaps and detergents etc., paper towels and toilet tissue etc., pet supplies(pet store section). The last category is clothing. Stores typically do not stock any more clothes than are absolutely necessary