My late DH started all of us dating anything and everything we bought, especially in the food line. I just remembered that when we bought this microwave, I took lessons in using it!!! That is OLD, so it's now in the garage for our next Ewaste announcements.
Toss out all the stuff with a year ago's date, with the possible exception for whole black pepper, whole cloves and any other whole spices. Maybe check unopened cans/bottles for the correct odors, to see if they smell like what they're supposed to be.