I’ve eaten dill pickles from canning jars that were canned AT LEAST ten years before I tried them.
They were totally fine.
I generally try to rotate my stored goods but once in a while you slip up and I opened a can of spagetti sauce that was about 5 years past the expiration.
Except for it looked as though a small amount of the water had somehow evaporated out (it was about a 1/4 inch from the top), it was totally fine and had no off-odor or color or texture ate all. It was spagetti sauce. Of course, it is by nature a high acid food.
We're still eating piccalilli put up my Mrs. C. 5 years ago.
My mom passed away in 2001, but her jalapeno pepper jelly lives on.
A lot of those “expiration” dates are there because FDA requires them and the manufacturers are happy to use them in order to sell more.