On March 12, most Americans will observe the start of daylight saving time (DST) and "spring forward" by setting their clocks one hour ahead. (The exceptions are people living in Arizona and Hawaii.)
DST lasts from mid-March until early November when the clocks turn back an hour and return to standard time. During DST, people can enjoy more time in the sunlight in the evenings. But that convenience comes at a price.
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About the Author
Matthew Solan, Executive Editor, Harvard Men's Health Watch
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