How Fresh Are Your Eggs?
Sell Date of Eggs - Date Codes on Egg Cartons

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Learn All About Eggs & How To Cook Them

Baked (Shirred) Eggs

Scrambled Eggs/Omelets

Photo from COOK IT QUICK!, University of Nebraska Cooperative Extension

The freshness of an egg is not only determined by the date when the egg was laid, but also by the way the egg has been stored. Proper handling and storage is perhaps the most important factor in determining freshness. If a freshly laid egg is left at room temperature for a full day, it will not be as fresh as a week old egg that has been refrigerated between 33° and 40°F. from the time it was laid.

According to the U.S. Dept. of Agriculture (USDA): 

Many eggs reach stores only a few days after the hen lays them. Egg cartons with the USDA grade shield on them, indicating they came from a USDA-inspected plant, must display the 'pack date' (the day that the eggs were washed, graded, and placed in the carton). The number is a three-digit code that represents the consecutive day of the year (the 'Julian Date') starting with January 1 as 001 and ending with December 31 as 365.

Though not required, most egg cartons also contain a "sell by" date beyond which they should not be sold. In USDA-inspected plants (indicated by the USDA shield on the package), this date can't exceed 30 days beyond the pack date which is within USDA regulations. Always purchase eggs before their "sell by" date.

How long are eggs good after the sell date?

Refrigerated raw shell eggs will keep without significant quality loss for about 4 to 5 weeks beyond the pack date or about 3 weeks after you bring them home."

A general rule to follow is that any egg that looks or smells odd should not be used. If an egg is bad you will know it. Just smell the egg! Just crack each egg in a small bowl, smell it - your nose will tell you!.

What is the best way to store eggs?

Buy refrigerated eggs and store them in the refrigerator as soon as your get home. However, even under refrigeration, eggs slowly lose carbon dioxide, which enlarges the size of the air cell and causes the yolk to flatten and the white to spread.