[dezzeus]

You're both right and wrong: the need to "move" that hour is needed only during a period of the year (latitute-dependent; on average March-October in the northern hemisphere) that mostly cover the Summer (Winter in the southern hemisphere), in order to synchronize our body-clock with the sunrise (which depends on your location).

Obviously a solution that is "one size, fit all" doesn't exists, hence those (poorly informed) discussions...

The energy's story is mostly a consequence.