Forbes asks: How does losing and gaining sleep involuntarily twice a year really affect us? 

The reality is that instead of getting more sleep on the first Sunday in November, many people wake up earlier, have difficulty falling asleep and even wake up during the night. “Each of us experiences predictable physical, mental and behavioral changes during the course of a day,” Komaroff wrote. “These are called circadian rhythms. The daily cycle of light and dark keep them on a 24-hour cycle. Sleep is a component of circadian rhythms. It is affected by outside influences, like light or Daylight Saving time. It can also affect the body’s other rhythms.”