Want to get the freshest eggs possible next time you're at the supermarket? Don't look at the "Best By" or "Sell By" date on the label. Find a little three-digit number that's stamped somewhere on the box. This is the actual day of the year that the eggs were packaged.
For example, if the eggs were put in the package on the 5th of January, the digit would read "005". If it were the 16th of February, it would say "047". But you don't even have to worry about figuring out what date those three digits translate to! You can just find the one with the highest number on the shelf... that will be the carton with the most recently packaged, freshest eggs.