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Here's a pretty good graph that illustrates the concept: https://www.timeanddate.com/sun/usa/san-francisco https://www.timeanddate.com/sun/usa/san-francisco D

Here's a pretty good graph that illustrates the concept: https://www.timeanddate.com/sun/usa/san-francisco https://www.timeanddate.com/sun/usa/san-francisco DST ensure that sunrise is kept at around 6 in the morning, this removes the "waste" of daylight from before most people wake up, and moves it to after work hours in the summer. Here's the same graph for Stockholm: https://www.timeanddate.com/sun/sweden/stockholm https://www.timeanddate.com/sun/sweden/stockholm There's not enough daylight in the winter to cover an entire working day and more, and there's too much daylight in the summer so everyone will "waste" it by sleeping, which makes DST pretty much useless. Edit: Here's Honolulu for reference: https://www.timeanddate.com/sun/usa/honolulu https://www.timeanddate.com/sun/usa/honolulu The band of daylight is almost the same width over the year, so moving it up and down doesn't do anything for people.

ants_a 8y ago
I live in the same latitude as Stockholm, and the extra hour of daylight in the afternoon is still nice in the summer, while having the sun rise one hour earlier would be more an annoyance than a benefit. We tried that, it was definitely not an improvement. I wouldn't actually mind keeping daylight savings time the whole year to reduce the time of the year when it's pitch black outside at all non-business hours.