Daylight savings time was first used by Germany during World War I in an effort to use less power for lighting and to save fuel for the war effort.
Following the lead of Germany, the United States Congress passed the Standard Time Act on March 15, 1918, which created DST, and it went into effect on March 31, 1918. The U.S. was following Europe’s example to extend the workday and save energy for war industries during World War I, which didn’t end until Nov. 18, 1918.
DST was replaced when WWI ended but reinstated during World War II. In 1966, President Lyndon B. Johnson established DST as a policy with the Uniform Time Act.
Hawaii and Arizona don't observe DST. Nor do the territories of American Samoa, Guam, the Northern Mariana Islands, Puerto Rico and the U.S. Virgin Islands. It's about time the rest of the United States dumps this outdated practice.