What the numbers on your egg carton really mean – and why ignoring them can make you sick

✅ How to use the Julian date safely

  1. Look for the three-digit number on the short side of the box (often near the USDA quality mark).

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

  3. Use the eggs within   3–5 weeks   of the packaging date.

  4. When in doubt,   throw it away  – especially in dishes like quiche, hollandaise sauce, vanilla pudding or tiramisu.


🥚 Bonus: More egg carton codes decoded

Labeling What it means
Grade AA, A, B Egg quality (AA = firm egg white, round yolk)
Organic Organic feed, no antibiotics, outdoor access
Cage-free Not kept in cages (but may still be indoors)
Pasture farming Access to the outdoors with a run
Plant identification (e.g. P-1234) Identifies the company for recall campaigns

🛡️ Tips for preventing egg diseases

  • You should never eat raw or undercooked eggs (unless they are pasteurized).

  • Cook egg dishes to   71 °C  (use a thermometer for quiches and puddings).

  •  Do not leave eggs unrefrigerated for more than   2 hours (1 hour at temperatures above 90°F).

  • Wash your hands and clean surfaces after handling raw eggs.

  • Buy eggs with   clean, undamaged shells.