sunrise Energy Manage

Daylight Saving Time Saves Energy in Buildings

sunrise Energy ManageThere are lots of folk tales about why we have Daylight Saving Time, but a blog posting on says the genesis of the time-change was to save energy in buildings.

In 2007, the US added four weeks to Daylight Saving Time by changing it to start on the second Sunday in March and end on the first Sunday in November. DOE estimates the four extra weeks save about 0.5 percent in total electricity per day, or electricity savings of 1.3 billion kWh. These electricity savings generally occur during a three- to five-hour period in the evening.

“Germany was the first country to implement Daylight Saving Time in 1916 to conserve resources during World War I,” according to the DOE blog. “The US adopted Daylight Saving Time toward the end of World War I and then again during World War II, but between 1945 and 1966, there was no federal law regulating it. This led to confusion between states, and in 1966 Congress passed the Uniform Time Act to establish uniform dates for observing Daylight Saving Time.”

Hawaii and Arizona (excluding the Navajo Nation) along with the U.S. overseas territories of American Samoa, Guam, Puerto Rico, the Virgin Islands and the Northern Mariana Islands do not observe Daylight Saving Time.

Photo: Sunrise over city via Shutterstock

Approaches to Managing EHS&S Data
Sponsored By: Enablon

Financing Environmental Resiliency and a Low-Carbon Future with Green Bonds
Sponsored By: NSF International

How to Unsilo Your EHS Data
Sponsored By: Progressly

The Corporate Sustainability Professional's Guide to Better Data Management
Sponsored By: Urjanet


Leave a Comment

User Name :
Password :
If you've no account register here first time
User Name :
User Email :
Password :

Login Now