The Dark Side of Daylight Saving Time

It’s no secret that we live in a sleep-deprived society. More than a third of Americans don’t get enough shuteye, defined as a minimum of seven hours a night. It’s not just the U.S.: much of the developed world is in a similar situation. “Sleep deprivation abounds,” says Eva Winnebeck, a chronobiologist at the University of Surrey in the U.K. “People do struggle to get up. Alarm clock use is high, lack of sleep is high.” (A rule of thumb: If you need an alarm clock to wake up, it probably means you aren’t sleeping enough.)