Dr. Shelby Harris, Kenneth C. Davis

The National Retail Federation says this year's Halloween spending on costumes, decorations, candy and greeting cards is expected to hit more than $13 billion. Author Kenneth Davis, the historian behind the "Don't Know Much About" series, explains how Halloween started. This weekend marks the end of daylight saving time as most of the U.S. "falls back" and gains an hour of sleep. Sleep expert Shelby Harris, a clinical associate professor at Einstein Medical School in New York City, joins "CBS Mornings Plus" to explain how the time change impacts our health.
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