For many, the change seems meddlesome, resulting in missed meetings and sleepy citizens. There may be even more severe effects. Some studies identified an increase in heart attacks that coincides with springing forward and a slight decrease when falling back. Other studies suggest the time change could be linked to an increase of fatal car accidents. Still other concerns include impacts to the immune system due to the inevitable sleep loss. What's more, many studies have questioned whether there have ever been energy savings at all. A 2008 study from the U.S. Department of Energy suggested that in the United States, an extra four weeks of daylight saving time saved about 0.5 percent in total electricity a day. But others conclude the situation is largely a wash.