There are two types of food expiration date labels: "best if used by" and "use by." Product dating is not required by Federal regulations except for infant formula and some baby foods, which must show the "use by" date. However, if a manufacturer chooses to include a calendar date, they must indicate which type of date it is.
A "best if used by" date tells you when the product will be of best flavor or quality. It is not a purchase or safety date.
A "use by" date is the last day recommended for use of the product while at peak quality. You should not buy or use baby formula or baby food after its "use by" date.