Go for it. Live post the experience, or maybe stream it on Youtube for us to be able to call the emergency services when you succumb to whatever it is that you succumb to.
Edit: Never mind, just realised who is posting. Just try and be civil when you join your mother-in-law's ghost
It will be fine, the method of getting those into tins leaves virtually no room for air and so deterioration is very, VERY slow! It might not taste quite as good as if it were recently bought, but if there are any issues you will know from the first taste.