It ain’t necessarily so.
More and more egg companies are stamping an expiration on their cartons. As a result, more and more perfectly fresh eggs are getting thrown away. One obvious solution is for the egg companies to offer up this simple test that anyone can do.
All they have to do is print it inside the carton.
Here it is in more detail.
So why don’t they do it? According to incredibleegg.org,
Dates on egg cartons and all other food packaging reflect food quality, not food safety. An ‘expiration’ or ‘sell-by’ date on an egg carton tells the grocer to pull the eggs if they haven’t sold by that time. A ‘best-by’ or ‘use-by’ date tells you that your eggs will still be of high quality if you use them by that date.
But experience tells anyone who has ever performed this test otherwise. More often than not, eggs remain fresh long past the expiration date.