Here are some problems caused by inconsistent use of daylight saving time: Increases the risk of heart attack and strokes - heart attacks may occur often because of the stress of starting a new work week and changes in their sleep-wake cycle.Sleep deprivation - setting the clock forward 1 hour for daylight saving time might mean losing an hour of sleep on the morning after the change.Increases car accidents - losing hours of sleep cause people to struggle to stay awake behind the wheel resulting to higher risk of car crash.