Day 1
It’s funny that we think of, “middle age” as somewhere around 50. Assuming a 100 year lifespan is pretty darn optimistic. Don’t get me wrong, I’d be happy to experience mid-life around 65 or so. But unless we make some major medical/robotic advances in the next 30-40 years, it’s likely my mid-life is in the rear view mirror. (And not that, “objects are closer than they appear” one either…)