Daylight Saving Time: Why Did We Do It?
At 2:00 a.m. local on Sunday, most of the United States (except Hawaii and Arizona) will leave daylight saving time behind and fall back an hour to standard time.
The annoyance of resetting clocks (or forgetting to, and showing up an hour early for appointments on Sunday) may raise the question of why we bother with this rigmarole in the first place.
http://news.yahoo.com/s/livescience/...mewhydidwedoit