Alexa, do you always have an issue with use by dates on food? Is this something you are anxious or obsessed about? Has your son, or someone else close to you, had food poisoning? It seems a very strange post and a very strange worry, to suggest you will get food poisoning eating a cooked turkey that is well within its use by date. Are you worried your son won't cook it right?
I'm sorry, I don't really understand what the problem is? What use by date would you want to see? I eat stuff days after the use by date, as long as it looks alright and smells alright.
Is there something else going on in your life that is causing you to focus in the negatives of your family coming to cook you Xmas lunch? I would be ecstatic! You mentioned food poisoning a number of times, as if you are expecting it, even though the turkey is perfectly safe. Have you had it before? Or lost someone close to you because of it?