Getting out of bed 'full of the joys of spring' in the deep, mid winter is, for the most, unheard of; falling out of bed and tripping up in the dark is more like it. For people with a variety of sleep disorders, life all year long can be difficult, but without a doubt, wintertime is the most challenging part of the year because of the effect the reduction of available light and drop in temperature has on how the brain and body functions.