Sleep is a vital physiological process with im- portant restorative functions that are essential for opti- mal day-time functioning. Insufficient or poor quality sleep has been associated with neurocognitive impair- ments,1,2 end-organ dysfunction and chronic health conditions,3–5 and increased mortality.6–8 Importantly, aging is associated with both qualitative and quantitative changes in our sleep pattern and distribution. For instance, in infancy, sleep duration is at a lifetime maximum, with newborn infants sleeping for