I know that some are dated on the outside with the standard code of "last digit of year + julian day". Most of the interior contents are marked the same. But with only the 1 digit of the year, how can you be sure that a meal is 2016 instead of 2006?
I THINK it can be at least fairly reliable to go by that last digit and the meal number/name combo. For example, on the two meals below, I attempted to determine their ages using this type of info.

The one on the left is "Menu 11 Vegetable crumbles with pasta in taco style sauce". It is by Ameriqual, so it has a date code on the back of the bottom seal: 6005. So it was made either Jan 5 2006 or 2016. Based on a list of menus I found online, if it was a 2006, Menu 11 would have been Spicy Penne Pasta. Therefore, the meal on the left must be from 2016.
The one on the right is "Menu 5 Chicken chunks, white, cooked". It is by Wornick so there is NO date on the outside. Looking at the same listing of menus, Menu 5 was only "Chicken chunks" in 2016 and 2017 (maybe 18?), so it must be 2016 or newer.
Am I right? Is there any better way of dating these things?
Thanks!
Rob