Date labels (e.g. \u201cuse-by\u201d, \u201csell-by\u201d, \u201cbest-by\u201d, \u201cbest if used by,\u201d \u201cexpires on\u201d, etc.) are on a lot of products. Forty-one states require a date label on at least some food product, but there are huge inconsistencies,