The current March to November system that the US follows began in 2007, but the concept of “saving daylight” is much older. Pro tip: It’s Daylight Saving Time, with singular use of “saving,” not “savings.”Reasons for Daylight Saving TimeThe US kept Daylight Saving Time permanent during most of World War II. During the energy crisis of the 1970s, we tried permanent Daylight Saving Time again in the winter of 1973-1974. Why do we need Daylight Saving TimeStudies over the last 25 years have shown the one-hour change disrupts body rhythms tuned to Earth’s rotation, adding fuel to the debate over whether having Daylight Saving Time in any form is a good idea. Although saving energy was often put out as a reason to have Daylight Saving Time, the energy saved isn’t much — if anything at all.

Source: CNN March 06, 2023 19:26 UTC