I can actually see the logic behind it.
We don't divide our days evenly IE we tend to get up later and stay awake longer. If everybody woke up at 4am and went to bed at 8pm, then DST would have no benefits.
However, a lot of "daylight" is wasted in the morning so if you can convince people to change their daily schedules to use more morning daylight and use less energy at night, then we become more efficient with our energy consumption. And what better way to convince people to wake up early than to trick them by switching the time.
But
The real question becomes is the energy saved really worth all the beurocracy and inefficiencies involved with swtiching times. Are we really facing an energy crisis? I would suggest the answer to be "No" to both questions.
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