How Daylight Saving Time Works?

Daylight Saving Time is four weeks longer since 2007 due to the passage of the Energy Policy Act in 2005.

 The Act extended Daylight Saving Time by four weeks from the second Sunday of March to the first Sunday of November, with the hope that it would save 10,000 barrels of oil each day through reduced use of power by businesses during daylight hours.

Unfortunately, it is exceedingly difficult to determine energy savings from Daylight Saving Time and based on a variety of factors, it is possible that little or no energy is saved by Daylight Saving Time. 

Daylight Saving Time is here again and in the early morning hours of Sunday the majority of the clocks in the U.S. need to “fall back.” While Daylight Saving Time has it purpose as an energy saving strategy, it also comes with a downside, according to The Columbian on Saturday, Nov. 3, 2012.

 Arizona (except some Indian Reservations), Hawaii, Puerto Rico, the U.S. Virgin Islands, and American Samoa have chosen not to observe Daylight Saving Time.

 This choice does make sense for the areas closer to the equator because the days are more consistent in length throughout the year. Previously, daylight saving time was observed in the United States from April until mid-October.