when was the first daylight savings time in the us?
Many other countries change their clocks when adjusting to summer time, but the United States only began doing so towards the end of World War I in an attempt to conserve energy. The House of Representatives voted 252 to 40 to pass a law to save daylight, with the official first daylight saving time taking place on March 15, 1918. This was initially met with much resistance, according Michael Downing, author of the book Spring Forward: The Annual Madness of Daylight Saving Time.