Ran a 12 hour roughing cycle at 3am in my Akron shop, and the rookie night guy was the only one who checked the offset
He caught a tool offset that was off by .040 before the finish pass, saved a $900 block of 4140 steel. So why do we treat night shift like the B team when they are the ones actually watching the numbers?
Did you see that study about how night shift workers actually catch more errors because there's less noise and distraction? Sounds like your rookie just proved that point in real time.