Joke Collection Website - Blessing messages - Excuse me, what is the format of the validity period of the credit card and the three digits on the back of the card when paying the phone bill by credit card SMS? I can't lose.

Excuse me, what is the format of the validity period of the credit card and the three digits on the back of the card when paying the phone bill by credit card SMS? I can't lose.

Every credit card has an expiration date, but you usually don't care too much. Usually in the middle of the card. For example, suppose (12, 14, 12 is the month and 14 represents the future year), that is, the card will expire on 20 14 and 12.