Here's How Daylight Saving Time Affects Your Health Daylight Saving Time begins at br 2 a.m. on March 10. This means we lose a br full hour of sleep. A recent study from the University of Colorado says that when clocks are moved up, the effect has a br negative impact br on one's health. According to the study, heart attack risks br increase 25 due to the sleep loss. The risk drops 21 br in the fall when webr gain an hour of sleep. The Mayo Clinic adds that daylight savings affects sleeping patterns for nearly a week. To help remedy, the br Better Sleep Council has a tip. The nonprofit says to go to sleep 15 minutes before your normal bedtime days before the shift.