While you may not be able to explain the contents of this act off the top of your head, the impact of this Act is known by every person living in the U.S. This act amended the Uniform Time Act of 1966 to increase daylight savings time in the spring by changing its start date from the first Sunday in April to the second Sunday in March, and in the fall by changing its end date from the last Sunday in October to the first Sunday in November. The justification for this portion of the Energy Policy Act of 2005 was that it would save energy.

This last October, the Department of Energy released its report of the impacts of Extended Daylight Saving Time on the national energy consumption. The report can be found here, but the gist of it is that the total electricity savings is .03 percent of electricity consumption in the U.S. over the year.

The good news? The change worked and energy was saved. How well it worked depends upon how significant you think .03 percent savings is in relation to the effort. The report didn’t cover economic impacts. Calendars in e-mail solutions are still suffering from the change, as the major collaboration vendors had to scramble to get patches into place to account for the changes. Going forward, most vendors were clever enough to change their code to prevent future issues, but problems still linger.

The effort by IT shops to implement the necessary patches and user education for Extended Daylight Saving Time must have had a monumental cost. Unfortunately, that study hasn’t been completed. But, at least the effort was not in vain.