After that dinner, I finally learned what that number meant. It’s called the Julian date, and it shows the exact day of the year the eggs were packed. Unlike the “sell by” date on the front, which is mainly for stores, the Julian date reveals how fresh the eggs actually are. When I checked the carton again, I realized the eggs weren’t technically expired—but they were old enough to lose freshness and quality.
Understanding this changed the way I buy eggs. Now I look for the highest Julian date number on the carton, because that means the eggs were packed more recently. I also check the plant code, which identifies where the eggs were processed and can be useful during recalls or safety alerts.
