Or daze as the case may be. That's how I refer to the day between groups of shifts. It usually takes me more than one day to recover from a cluster of shifts and I find my self wandering about the house on my day off in a semi conscious 'zombie' state. It's not necessarily a bad feeling but I know that it's usually a day that I not going to get a lot done before I go back to work. Lather, rinse, repeat...