I want to know the answer to the following question:
What year did the U.S. go to war, leading to wider acceptance of daylight savings?
All the background I'm provided with is that "After Germany led the way with starting DST (German: Sommerzeit) during World War I on 30 April 1916 together with its allies to alleviate hardships from wartime coal shortages and air raid blackouts, the political equation changed in other countries; the United Kingdom used DST first on 21 May 1916.". Is that enough to answer the question?