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xkcd #2846: Daylight Saving Choice
(imgs.xkcd.com)
Alt text:
I average out the spring and fall changes and just set my clocks 39 minutes ahead year-round.
But who cares? Everything would be open 8am-5pm GMT regardless if it's sunny or dark outside. Go visit the Grand Canyon at midnight, it's the same as at sunrise or at noon!
No it wouldn't, generally it's healthier for humans to sleep at night, so businesses are going to trend towards operating during sunlight hours.