Heart attack or stroke. According to a study led by a University of Colorado fellow in 2014, when Americans lose one hour of sleep in the spring, the risk of heart attack increases by 25%. When the clock gives back that hour of sleep the risk of heart attack decreases by 21%.
Sleep. Gaining or losing an hour probably will affect sleep patterns, often for about five to seven days, said Timothy Morgenthaler, Mayo Clinic’s co-director of the Center for Sleep Medicine. The most notable changes are in those who regularly do not get enough sleep. People who are sleep-deprived might struggle with memory, learning, social interactions and overall cognitive performance. The nonprofit Better Sleep Council suggests going to bed at least 15 minutes earlier than your set bedtime days before the time change.
Daylight saving facts
- Daylight saving was first started to save energy, but it turned out people enjoyed having an extra hour of daylight after work. But not in Arizona, where sunlight only extends the heat-related misery.
- The Navajo Reservation observes daylight saving time; the Hopi Reservation does not. The Navajo Reservation surrounds the Hopi Reservation, so if on Monday you drive from Flagstaff to Gallup through Tuba City and Ganado, you’ll change the time on four occasions.
- More than 70 countries observe daylight saving time. No one is sure just how much daylight is saved, globally, each year, though physics indicates none.
- It is daylight saving time, not daylight savings time.