The lower front of the card.

The validity period of a credit card is on the lower front of the card, in the format of month first and date last. For example, the number marked below the credit card number is the expiration date, and the format is month first and date last. Some credit cards will also indicate the start of the expiry date. The validity period is usually found below the card number on the card, in the format of "XX/XX", where XX represents the month and XX represents the year. Some credit cards will also indicate the end of the validity period.