Daylight Saving Time

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.
Daylight saving time is most often associated with the oh-so-sweet extra hour of sleep in fall (and the not-so-nice loss of an hour in spring), but some of the original reasons for resetting our clocks twice a year including saving energy and having more daylight hours for retailers, sporting events and other activities that benefit from a longer day.
As far back as the 1700s, people recognized the potential to save energy by jumping clocks ahead one hour in the summer - Benjamin Franklin even wrote about it - although the idea was not put into practice until the 20th century.