At 2 a.m. on March 9, 2008, groggy Americans will turn their clocks forward one hour, marking the beginning of Daylight Saving Time. The federal law that established "daylight time" in the United States does not require any area to observe daylight saving time. But if a state chooses to observe Daylight Saving Time, it must follow the starting and ending dates set by the law.

Under new law established in 2007, it is observed from the second Sunday in March to the first Sunday in November, adding about a month to daylight saving time. Until April 2005, when Indiana passed a law agreeing to observe daylight saving time, the Hoosier state had its own unique and complex time system. Not only is the state split between two time zones, but until recently, only some parts of the state observed daylight saving time while the majority did not.

Months after Indiana passed the law that got it in step with the rest of the country, the federal government announced a major change in Daylight Saving Time. In Aug. 2005, Congress passed an energy bill that included extending Daylight Saving Time by about a month. As of last year, Daylight Saving Time starts the second Sunday of March and ends on the first Sunday of November. More than one billion people in about 70 countries around the world observe Daylight Saving Time in some form. Set your clocks ahead one hour Sunday, March 9th.