"The resulting extra daylight and cooler mornings--Whoa-ho. Let's just stop right there and clear something up. Setting the clocks back does not magically give you "extra daylight." DST or no, Japan will still get about 15 1/2 hours of daylight on the summer solstice. Whether that starts at 4:30 a.m. or 5:30 a.m. does not change the total quantity of daylight. The mornings may be cooler, but only because there is an hour less sun in it. By extension, this means that the evenings are hotter as there is an hour more sunlight.
Given the 24-hour nature of life in this day and age, why are we fussing over where the big hand and the little hand are when the sun comes up?
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