Tiresafteygroup.come and tirerack.com are just two of the Web sites that came up when I punched in tires date codes. In Canada we have the same protocols regarding tires. I'd be repeating what longbox55 said. Tires are one thing that I do not compromise on any mo. They have to be safe to run,our lives and the lives of others are too important to risk at the expense of using old, used or new tires because one is to cheap to buy good guality new tires.