History

As time to ‘spring forward’ nears, daylight saving time is coming up on a milestone

It's almost time to spring forward again.

Residents of California – as well as most of the United States – will turn their clocks ahead one hour at 2 a.m. Sunday for the start of daylight saving time.

<blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr">Early reminder that Daylight Saving Time begins this Sunday, March 11th at 2 am. Turn those clocks ahead an hour before bed this Saturday night. <a href="https://twitter.com/hashtag/springforward?src=hash&amp;ref_src=twsrc%5Etfw">#springforward</a> <a href="https://t.co/xa9aTc4ovr">pic.twitter.com/xa9aTc4ovr</a></p>&mdash; NWS Bay Area (@NWSBayArea) <a href="https://twitter.com/NWSBayArea/status/971258002027302913?ref_src=twsrc%5Etfw">March 7, 2018</a></blockquote> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

However, this year is different than most. That's because the annual changing of the clock in spring and fall celebrates its 100th anniversary in the U.S.

First put into effect in this country on March 19, 1918, during World War I, it was used in an effort to preserve coal. The time shift, which is regulated by the U.S. Department of Transportation, happens on the second Sunday in March and will end – or "fall back" as its commonly referred to – on the first Sunday in November. It's been in use since 1966 under the Uniform Time Act.

Arizona and Hawaii do not observe it, and there's been an unsuccessful push in recent years to scrap it in California. However, Florida could soon adopt daylight saving time all year.

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