Randy, as far as I know, government MREs never have “use by” dates. I looked up HEATER MEALS EX and they sell commercial MREs. From what I can find out old MREs that are properly stored over time lose taste, texture and nutritional value. If the bags are not damaged or bloated, they may be safe to eat. I have a couple of cases of commercial MREs and at the end of 4 years I replace them. I ( because my wife refuses) start to eat the old ones. I think I would avoid eating your church’s MREs.