Decoder
Egg Carton Julian Date Decoder
The 3-digit number stamped on an egg carton is a Julian date — the day of the year the eggs were packed. Enter it below to get the exact date and see how fresh your eggs really are.
Decode the egg carton code
- Julian Date (JD)
- Modified JD (MJD)
- Julian Day Number
Enter the 3-digit code (e.g. 202). The reference year defaults to this year — change it if the carton is older.
Where to find the code
On USDA-graded eggs, the Julian pack date is printed on the short end of
the carton, near the “Sell By” or “Best By” date and a plant code that
starts with P. The Julian date is the 3-digit number
between 001 and 365 — the sequential day of the
year the eggs were washed, graded and packed.
Quick reference
| Code | Pack date (common year) |
|---|---|
| 001 | January 1 |
| 032 | February 1 |
| 060 | March 1 |
| 100 | April 10 |
| 202 | July 21 |
| 365 | December 31 |
How fresh are the eggs?
The pack date is the honest freshness indicator — often more useful than the Sell-By date, which by USDA rule can be up to 30 days after packing. Kept refrigerated at or below 40 °F (4 °C), eggs typically stay good for 3 to 5 weeks past the Julian pack date. A simple float test (fresh eggs sink and lie flat) is a good final check.
Julian date vs. Sell-By date
The Julian date is when the eggs were packed. The Sell-By/Best-By date is a store-stocking guideline. Use the pack date to judge true freshness.
Related
Frequently asked questions
Where is the Julian date on an egg carton?
Look on the short end of the carton, usually next to a "Sell By" or "Best By" date and a plant code beginning with "P". You will see a 3-digit number from 001 to 365 — that is the Julian date, the day of the year the eggs were washed and packed.
How do I read the 3-digit egg code?
The number is simply the day of the year. 001 is January 1, 032 is February 1, 060 is March 1 (in a common year), and 365 is December 31. Enter the code above to get the exact calendar date for the current year.
How long are eggs good after the pack date?
Properly refrigerated, eggs are generally safe to eat for about 3–5 weeks after the Julian pack date, and often past the printed Sell-By date. The pack date tells you how fresh they really are, regardless of the Sell-By label. Always check for freshness before use.
What is the "P" plant code next to the Julian date?
The code starting with "P" (for example P-1234) identifies the USDA-registered facility that processed and packed the eggs. It is separate from the Julian date and is used mainly for traceability and recalls.