The problem is that you've never seen a Real Egg . Once upon a time, back when almost everybody ate an egg for breakfast, folks knew what a real egg was. The chances were pretty good that they kept their own hens, and gathered the eggs every day. Back in 1945, a person in this country ate an average of 402 eggs a year. But after WWII, as more families moved off the farm to the city, and as more women entered the workforce, that number fell to 234 eggs a year in 1995.
Most people just crack open an egg and never give it a second thought.
They don't know the difference between AA and A, or even how to tell if that egg is fresh. That first number is the Julian date, and it represents the date the eggs were packed. A Julian date starts the year, January 1st, with the number 1, and ends on Dec31st with the number 365. That second date, which is not required by the way, can not exceed 30 days past the packing date. If your egg carton doesn't have an expiration date, the eggs are still useable for 4 or 5 weeks past the Julian date if you keep them in the refrigerator.