What the Numbers on Your Egg Carton Really Mean — And Why Ignoring Them Could Make You Sick

✅ How to Use the Julian Date Safely

  1. Find the three-digit number on the short side of the carton (often near the USDA grade mark).

  2. Convert it to a calendar date (a Julian date converter helps).

  3. Use eggs within 3–5 weeks of that pack date.

  4. When in doubt, throw it out—especially for dishes like quiche, hollandaise, custard, or tiramisu.


🥚 Bonus: Other Egg Carton Codes Decoded

MarkingWhat It Means
Grade AA, A, BEgg quality (AA = firm whites, round yolks)
OrganicOrganic feed, no antibiotics, outdoor access
Cage-FreeNot kept in cages (may still be indoors)
Pasture-RaisedOutdoor access with roaming space
Plant Code (e.g., P-1234)Identifies the farm for recalls

🛡️ Tips to Prevent Egg-Related Illness

  • Never eat raw or undercooked eggs (unless pasteurized)

  • Cook egg dishes to 160°F (use a thermometer for quiche and custards)

  • Don’t leave eggs out longer than 2 hours (1 hour if over 90°F)

  • Wash hands and surfaces after handling raw eggs

  • Buy eggs with clean, uncracked shells