Time change, time change 2009

Although history will show us an assortment of reasons based on the issues of the day, the biggest reason is that consistent Daylight Saving Time saves energy. The "theory" is that we use less electricity because we are home fewer hours during the "longer" days of spring and summer. This assumes that most people will be outdoors during the extra daylight hours. Since the sun "sets" one hour later during Daylight Saving Time, it therefore reduces the period between sunset and bedtime by one hour. So in theory, this means that less electricity would be used for light and appliance usage late in the day.

Although history shows us a variety of reasons based on the themes of the day, the biggest reason is that constant DST saves energy. The "theory" is that use less electricity because we are home fewer hours during the "longer" days of spring and summer. This assumes that most people will be open extra hours during daylight. As the sun "set", an hour later during daylight saving time is reduced accordingly the period between sunset and bedtime by one hour. So, in theory, this means that less electricity would be used for light or used too late.

Other reasons, based on studies by the U.S. Department of Transportation, has determined that DST saves lives and prevents accidents. Their argument is that this allows more people to travel home from work and school in daylight hours, which feels it is safer than traveling in the dark. In addition, people can complete the commissions more during daylight hours to reduce exposure to various crimes, which are more common in darkness, helping to reduce crime.