Cosmetic packaging can contain several time-related marks. Combining them into one invented “expiry date” hides the information you actually have.
A printed best-before or expiry date is product-specific packaging information. A decoded manufacture date tells you when a batch was made. An open-jar mark describes a period after the product is opened. Keep those clocks separate.
Use a decoded date to understand batch age, not to overwrite a printed label. If the package has no direct date, the result is still context rather than a safety or authenticity guarantee.
Why Lotly does not fabricate an expiry date →
Lotly