If you’ve ever read what’s written on the egg carton, you’ve probably seen terms like “Farm Fresh” or meaningless numbers you couldn’t decode. Fresh Eggs Daily decided to post an explanation of these terms and numbers and their information may surprise you.

Here’s what their post said:
“So today I was shopping and snapped a few photos of some egg cartons. EVERY date I saw on them was between 352-355, meaning that those eggs were put in that carton on the 352nd-355th day of last year. Add to that the 19 days so far this year, and these eggs have all been in the carton for about a month (and could have been laid up to 30 days prior to that) and check out the Sell by dates — these eggs can still sit on the shelf for a few more weeks.”

In other words, egs are marked using a special “code” that follows a julian calendar instead of simple dates we’re used to. Each carton has a number printed from 1 to 365. This number represents the day of the year the carton was filled: 1 being January 1st and 365 being December 31st. This way you can tell when the eggs were placed in the carton.

In the video below, Fresh Eggs Daily asked a friend to visit local supermarkets and do a truly fascinating research that will leave you wondering how fresh or safe the food you’re buying actually is.