Coty Batch Codes (YDDD): How to Read Them

Coty uses one of the shortest formats in the industry: four digits, nothing else. The first digit is the last digit of the production year. The remaining three are the Julian day — the day's position in that year, counted from 001 on 1 January to 365 (or 366 in a leap year) on 31 December.

That is the entire cipher. There is no plant code, no month letter and no line number to interpret. Coty applies it across everything it manufactures, which is why the same rule reads a Rimmel mascara, a Hugo Boss eau de toilette and an adidas body spray.

Because the day is encoded exactly, a Coty code gives you the manufacture date to the day — better precision than most of the industry, where month-level accuracy is the norm.

• Take the first digit and find the most recent year that ends in it. A code starting with 4 read in 2026 means 2024, not 2014 — unless the product is obviously older.
• Take the last three digits as a day number. Divide by roughly 30.4 to get the approximate month: day 135 ÷ 30.4 ≈ 4.4, so early in the 5th month, May.
• Sanity-check the result against the product. A code that decodes to a date before the product line launched is a red flag worth taking seriously.

On fragrance, look at the base of the outer box and at the clear sticker on the underside of the bottle — the code is usually printed in small black or grey ink on both, and the two should match. A mismatch between box and bottle is a classic sign of repackaged or grey-market stock.

On colour cosmetics (Rimmel, Bourjois, Sally Hansen, Max Factor, CoverGirl) the code is stamped or embossed on the back of the pack, sometimes on the crimp of a tube. Embossed codes are unlit and low-contrast: photograph them with light raking across the surface rather than head-on.

The code is never the long barcode number under the black stripes. That is the EAN, which identifies the product for sale and carries no date.

The year is a single digit, so it repeats every ten years. A code reading 4135 is 14 May 2024 — but it is also, on identical evidence, 14 May 2014. The decoder assumes the most recent plausible year; on a bottle that looks a decade old, subtract ten years.

The code records when the product was made, not how long it stays usable once you open it. That is the PAO symbol — the open-jar icon marked 12M, 24M and so on. A three-year-old sealed bottle can be fine; a mascara opened eight months ago is not, whatever its batch code says.