"I'm on night-shifts at the moment. After some time being able to keep the same hours as reasonable people it's come as a bit of a shock to the system." Which is why I was happy that I had a set daytime or evening schedule for most of my career. I can't handle those overnight shifts, though the night differential pay was tempting. I rather preferred overtime to working overnight. It really threw me off. I don't know how my brother does it. He is a paramedic Lt.with FDNY. He has always worked overnights.......