Jack, you shall overcome!
Though I do disagree with your thread title.
At our age, every day we wake up, get out of bed and start walking around is a GREAT Day.
Have you been to any of your high school, or service outfit reunions lately?
If so, I think you'll have a tendency to agree with me.
So many(more all the time) of our younger day cohorts are not around anymore. So any day that we ARE is a very good day.