From a report on Bloomberg: The case for daylight saving time has been shaky for a while. The biannual time change was originally implemented to save energy. Yet dozens of studies around the world have found that changing the clocks has either minuscule or non-existent effects on energy use. […] The latest research suggests the time change can be harmful to our health and cost us money. The suffering of the spring time change begins with the loss of an hour of sleep. That might not seem like a big deal, but researchers have found it can be dangerous to mess with sleep schedules. Car accidents, strokes, and heart attacks spike in the days after the March time change. It turns out that judges, sleep deprived by daylight saving, impose harsher sentences. […] Some of the last defenders of daylight saving time have been a cluster of business groups who assume the change helps stimulate consumer spending. That’s not true either, according to recent analysis of 380 million bank and credit-card transactions by the JPMorgan Chase Institute.
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