Refers to the validity period.

EXP?DATE is the abbreviation of Expire?date, which generally refers to the validity period. For example, EXP?DATE?DEC?31 2008 refers to the validity period before December 31, 2008.

Extended information:

Validity period available period; effective date

The validity period of a drug refers to the period during which the quality of the drug can meet the specified requirements under specified storage conditions. The time required for the drug to lose 10% of its efficacy. If the validity period is set as December 2002, it means that the drugs produced in this batch are still valid until December 31, 2002.

Credit Card Validity Period

The validity period of the credit card is clearly marked on the face of the credit card. The credit card validity period is generally listed below the credit card number. The standard format is month first and year After, for example: 09/11 means your credit card is valid for September 2011. The vast majority of credit cards issued by domestic banks are valid for three years.

Reference: Baidu Encyclopedia - Validity Period