[–] downton-stabby 2 points 0 points 2 points (+2|-2) ago (edited ago)
the effects of daylight do offset their sleeping patterns somewhat which have to be adjusted when you have to get up earlier or later to get a chore done in the light (or lack thereof)
Anyone traveling for work deals with Jet-lag continually. Also anyone who just had a child and are saying goodbye to sleep while taking care of a screaming baby and having to work.