Wow Don. All the rest of us walk around with out knowing our "Expiration Date" To have it set in front of you, as a hard date, has got to be mind-reeling.
I am sorry for your position, and that your Family will have to go on without you.
That said, the positives are your demonstration of Christ-like faith and actions, both to us and your Family. Plus you have a chance to air out all that needs to be said. I pray that your Joy will be full, that your time is well spent, that you feel strong and finish strong. Bless you Brother, you are a great example of humilty and love.