How To Read Kellogg's Expiration Date Codes - Coffee.Like as ‘made with real fruit’, ‘no high-fructose. The package of Kellogg’s Nutri grain Bars may have phrases. Expired as in going bad, Nutri grain bars will begin to go rancid and have an off, gross taste and texture. Currently, the United States does not have a regulated or standard system for coding expiration dates on food, except for those on baby food and infant formula. The first 2 codes indicate the month of expiration, the next 2 indicate the date and the last 2 indicate the year. Cheez It Expiration Date Codes Do Cheez Its Expire Expiration dates can be hard to locate on a product and even more challenging to decipher. We do not see this type of an expiration date on the product itself. All foods reach a point where the actual safety of the food comes into question. Related: What Should You Do With Your Canned Foods After the Expiration Date? Safety Expiration. These retail expiration dates are stamped on the product. Kellogg's Snacks Expiration Date Codes Popular Kellogg's products that we carry (both in our vending machines and sold by the case) include Cheez-Its, Famous Amos cookies, Nutrigrain cereal bars, Pop Tarts, and a variety of cereals (Apple Jacks, Cocoa Krispies, Corn Pops, Froot Loops, Frosted Flakes, Frosted Mini Wheats, Raisin Bran, Rice.