This seems to be an idea that simply won't work everywhere. I can read outside at night during the summer because the sun barely goes below the horizon. In June, sunsets are around 11:30 and sunrise is at 3:00am. It really doesn't matter if you set the clock so that it rises at 7am nor not.<p>During the winter, 10:00am sunrises and sunsets at 14:30. The times in between June and December vary, unsurprisingly, and gaining/losing 5-6 minutes a day isn't uncommon.<p>On the opposite end of the spectrum, folks at the equator are having fairly standardized 12 hour days for most of the year.<p>We'd never know what time it is anywhere during the year (unlike time zones with or without DST), and some folks would find it seriously inconvenient.