Savings in energy are meant to provide one of the strongest rationales for DST/multiple-time zones.However, the simplest, easiest, low-cost measure is to make more use of natural (sun)light i.e start activities early and finish the day early.Even in western-most India activities start well in to the day so rather than reset clocks just reset school, office and institutional start times.And the eastern regions should begin even early. There is no reason for offices and schools to start as late as they do now.This is low-hanging fruits that we must use. It almost as good as a free-lunch.
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