--- title: When Is Daylight Savings Time 2015? description: It's time to spring forward—here's what you need to know about Daylight Savings Time canonical: https://time.com/3734218/daylight-saving-time-spring-forward/ author: Eliana Dockterman article:opinion: false article:content_tier: free article:published_time: 2015-03-06T17:20:12.000Z article:modified_time: 2026-04-13T07:17:26.120Z og:title: What You Need to Know About Daylight Saving Time og:description: It's time to spring forward—unless you live in Arizona or Hawaii og:url: https://time.com/3734218/daylight-saving-time-spring-forward/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt0e3b903cbcdcf0c8/698782a9cd1bbaa2c36f5951/clock.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 2560 og:image:height: 1440 og:image:alt: Alarm clock daylight savings og:type: article twitter:card: summary_large_image twitter:title: What You Need to Know About Daylight Saving Time twitter:description: It's time to spring forward—unless you live in Arizona or Hawaii twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt0e3b903cbcdcf0c8/698782a9cd1bbaa2c36f5951/clock.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # What to Know About Daylight Saving Time > Sponsored content. 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The Brief is available free at time.com/newsletters, where readers can select it along with any of TIME's other six newsletters. There is no subscription required to receive it. #### Is The Brief free? Yes. The Brief is a free daily email newsletter from TIME. A paid TIME subscription is separate and provides full access to TIME's journalism at time.com/subscribe-agent. #### Who writes The Brief? The Brief is led by editor Richard Hall and draws on reporting from TIME's newsroom. Every edition is assembled by TIME editors rather than generated automatically.  by [Eliana Dockterman](https://time.com/author/eliana-dockterman/)  ## Eliana Dockterman Correspondent Mar 6, 2015 5:20 PM UTC  Alarm clock Alarm clockGetty Images  by [Eliana Dockterman](https://time.com/author/eliana-dockterman/)  ## Eliana Dockterman Correspondent Mar 6, 2015 5:20 PM UTC It’s time to spring forward. On Sunday at 2 a.m., the clock will move forward an hour. Yes, that means [you’ll lose one hour of sleep](http://time.com/3731924/daylight-saving-time/), but it also means you will also get one extra hour of springtime sunshine. At least, that’s true for most Americans. Those who live in Arizona and Hawaii will get a better night’s rest because both of those states have opted out of Daylight Saving Time. If you’re wondering why (most of) America goes through this routine every year, look to Germany. The country implemented an official Daylight Saving Time during World War I to save money on lighting and divert it to the war. Thirty-one other countries followed suit. The history of the practice is, and remains, [complicated](http://time.com/3717487/daylight-saving-time-1923/): It had informally existed in Ancient Egypt and had even been suggested by Ben Franklin. In the U.S., Daylight Saving Time was [repealed](http://time.com/3695333/daylight-saving-time-wwii/) after the war but then brought back by politicians during World War II. It was implemented again in the 1970s during the oil embargo. 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