My boss knows I sleep inconsistently and lets me improvise all my work time based on when I'm awake. I'm told this is not normal, which is a shame because it implies we take humanity for granted enough to revolve our bureaucracy/system around commonalities that don't exist. And then we try to throw a drink (coffee) at the problem as if that's good for us or even does the job well, alertness and wakefulness not being the same thing.