Don't know if it is just Michelin couple of years ago I bought four "new" Tiger paw tires from Priority Tires, thru Walmart, to put on my daughter's Ford focus before sending her off to school.
One of the tires had a blowout at Highway speed within a few days of being installed on the car
When I had all the tires inspected, the date code showed that they were all six years old
I went to a lot of hassle to get there, but eventually the local Michelin uniroyal dealer replaced all four of the tires and they told me they couldn't believe any dealer would sell me tires with a date stamp six years old
They said they pulled all of their tires out of inventory and sent them back to the manufacturer when they got to be one and a half to two years old
Eventually, the customer service representative at Walmart, reimbursed me the entire price of all the tires
Whether or not priority tires owned up to it and reimbursed walmart, I don't know, but I doubt it because they kept claiming there was nothing wrong with selling in six-year-old tires
At any rate, if I were you, I would get rid of those tires