Daylight saving time was originally implemented during war time to reduce energy consumption, but studies have shown that DST no longer has that effect. Instead, the semiannual time change is very costly to our nation. One index indicates that the time change costs the American economy $434 million, based on lost sleep, workplace injuries, and cyberloafing. Time change also hurts the transportation industries in an attempt to maintain schedules. Additionally, a 2012 study found the risk of heart attack increases 10% in the days following the beginning of DST, likely due to the disruption of biological rhythms.
Daylight Saving Time is preferable to Standard Time because the additional evening hours of light lead to a boost in recreation, reduced crime rates, and an economical boost.