Zuzana Irsova, Tomas Havranek, Dominik Herman, 02 December 2017

The original rationale for daylight saving time was energy savings. This column reveals, however, that the modern empirical literature on the topic finds no savings on average. The extent of savings is related to latitude – regions at higher latitude enjoy slightly more savings, but subtropical regions consume more energy because of daylight saving time. Even in Scandinavia, the savings amount to just 0.3% of annual energy consumption. Policymakers must look at other effects of daylight saving time to justify the continued use of the policy.

Matthew Kotchen, Laura Grant, 05 December 2008

Daylight saving time, designed for energy conservation purposes, is among the most widespread regulations on the planet. Surprisingly little evidence exists that it actually saves energy. This column, using a natural experiment, concludes that “saving” daylight has cost electricity.