Change Your Clocks Back This Saturday Night Leave a Comment / Uncategorized / By Joy Cooper Change Your Clocks Back This Saturday Night There are approximately 70 countries who observe daylight savings time but the dates it is implemented is not standard. Learn more at https://betterhomeowners.com/…/Change-Your-Clocks-Back… Daylight savings time has been part of the U.S. during World War I & II to add more daylight hours to conserve energy. Permanent DST was established in winter of 1974.