Types of Food Product Dating
“Open Dating” on a food product refers to an actual calendar
date instead of a coded date. This type of date is found mainly on perishable
foods such as meat, poultry, eggs and dairy products. It helps the store to
know when to pull these foods off the shelf. It can also benefit consumers to
help determine when a product is at its best quality. It is not a safety date.
With the exception of infant formula and some baby food,
product dating is not required by federal regulations. There is also no uniform
system used for food dating by manufacturers in the United States. Although
dating of some foods is required by more than 20 states, some states do not
require any date codes.
“Closed or coded dates” are packing numbers used by the
manufacturer identify and locate product if there is a recall.
These types of datings are typically found on shelf-stable
foods, such as canned and boxed foods.
Dating Terms
• “Sell-By-Date”: tells the store how long to display the
product for sale. The consumer should buy the product before the date expires.
• “Best-If-Used-By (or Before) Date”: recommended for best
flavor or quality. It is not a purchase or safety date.
• “Use-By-Date”: the last date recommended for the use of
the product while at peak quality. The date has been determined by the
manufacturer.
Except for “use-by-dates”, product dates don’t always refer
to home storage or use after purchase. Even if the dates expire during home
storage, perishable foods should be safe, wholesome and of good quality if
handled properly and kept in the refrigerator or freezer.
Dating of Infant
Formula and Baby Foods
Formula and baby food dating is for quality as well as
nutrient retention. The “use-by-date” is selected by the manufacturer on the
basis of product analysis throughout its shelf life. It is also based on the
conditions of handling, storage, preparation and use printed on the label. Do
not buy or use infant formula or baby food after its “use-by-date”.
Can Codes
Canned food must have a packing code to enable tracking of
the product in interstate commerce. These codes, which appear as a series of
letters and/or numbers, might refer to the date or time of manufacture. They
aren’t meant for the consumer to interpret as “use-by” dates. Cans may also display “open” or calendar
dates. Usually these are “best-used-by” dates for peak quality.
The U.S. Food & Drug Administration says canned foods
are safe indefinitely as long as they are not exposed to freezing temperatures
or temperatures above 90 F. However,
discard cans that are dented, rusted, bulging, leaking or swollen.
In general, high acid canned foods, such as tomatoes,
grapefruit and pineapple can be stored on the shelf 12-18 months. Low-acid
canned foods such as meat, poultry, fish and most vegetables will keep for 2-5
years, if the can remains in good condition and has been stored in a cool,
clean, dry place. Normally food from these cans is safe to eat unless there is
bulging or leaking.
Dates on Egg Cartons
If the egg carton has an expiration date printed on it, such
as “EXP April 1”, be sure that the date has not passed when the eggs are
purchased. That is the last day the store may sell the eggs as fresh. On eggs
which have federal grademark, such as Grade AA, the date cannot be more than 30
days from the date the eggs were packed in the carton. Eggs can be stored at
home, refrigerated, for 3 to 5 weeks if purchase before the expiration date.
Storage Times
Since product dates aren’t a guide for safe use of a
product, follow these tips to make sure that food is still top quality.
• Purchase the food before the expiration date.
• For perishable food, take it home immediately after
purchase and refrigerate it properly.
• Once the product is frozen, it doesn’t matter if the date
expires because foods kept frozen continuously are safe indefinitely.
• Follow handling recommendations on the product.
Author: Richard Smith, Environmental Sanitarian
Author: Richard Smith, Environmental Sanitarian
Source: USDA,
Arizona Cooperative Extension
