Date Code

Industry & Trade
Definition
The portion of a box code giving production month and year. Cuba adopted a printed three-letter month code with a two-digit year in 2000; earlier boxes used other systems, and non-Cuban makers use their own formats.
Why it matters
Without a date code there is no way to verify age claims, which is why collectors buying aged boxes photograph the stamp before money changes hands.
In context
"The date code read MAY 09, so the seller's story checked out."