No more changing clocks? History says be careful what you wish for on daylight saving time.

This decision did not soften the blow of the OPEC oil embargo, but it did put schoolchildren on pitch-black streets every morning until the plan was scaled back. A Department of Transportation study concluded that Nixon’s experiment yielded no definitive fuel saving. It optimistically speculated, however, that daylight saving might one day help us conserve as many as 100,000 barrels of oil a day.

Source: WP