I know the feeling of not wanting a certain date but if he does come that day you can have a happy memory of that day!
I had a really traumatic event happen on 11/22 and would be bummed if my little girl came then but also feel maybe it would be healing to have her on that date.
Just know that once your little guy is here nothing else really matters. You will feel so much joy and happiness. Best of luck to you!!
Jkate57 has answered the question and it's the best to my knowledge I mean exactly what I would say wish u all the best
Also good luck and I'm sorry to hear about your nephew :(
-Pray about it
-Don't do anything that day, just lay around
-Stay hydrated so you dont have contractions
-keep bladder empty so you dont have contractions