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Daylight Saving Time
A history of daylight-saving time, from the original rationale through the many changes in law regarding its use in the United States. An explanation of how the clock changes work; which states change clocks, don't, or only change in portions; includes a list of countries that use Daylight Saving Time. "This exhibit is a public service of the Institute for Dynamic Educational Advancement," a nonprofit organization.
http://www.webexhibits.org/daylightsaving/
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