Starting on April 30, 1916, the German Empire and its World War I ally Austria - Hungary were the first to use DST (German: Sommerzeit) as a way to conserve coal during wartime. Britain, most of its allies, and many European neutrals soon followed suit. Russia and a few other countries waited until the next year, and the United States adopted it in 1918.
when did the us adopt daylight savings time and who originally suggested it
1918