Some facts about daylight-saving time, and why we’re making the switch so much earlier this year: The history: The U.S. went on daylight-saving time in World War I, but only for seven months. It was tried again in World War II. The Uniform Time Act made it a law in 1966. Why: To conserve fuel by adjusting daylight hours in the summer to more closely match the hours that people are awake. When to make the change: Traditionally, clocks were changed in April and October. This year, it starts earlier. Advance your clocks at 2 a.m. Sunday. The fall back is now Nov. 4. The change was mandated by the Energy Policy Act of 2005. Why the dates are changing: The government is still trying to conserve fuel. Moving clocks ahead is expected to cut energy consumption nationwide by about 1 percent each day, according to the U.S. Department of Transportation. That is projected to result in $320 million in savings by 2020 and could reduce the need for new power plants. Source: California Energy Commission 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!