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US prepares to spring forward to daylight-saving time

The value of daylight-saving time has been disputed for generations. Proponents argue that it saves energy and promotes outdoor activities during summer evenings. Urban workers, retail shop owners and tourism businesses tend to favor DST.

Opponents say the actual energy savings are inconclusive and negligible due to modern energy consumption patterns. Many also argue that DST disrupts morning activities, and the complexities involved with changing clocks twice a year is socially and economically disruptive. Groups who dislike DST are evening entertainment businesses, farmers, transportation companies and organizations that work across multiple time zones.