Spring forward, fall back.
It's been engrained in our minds since childhood -- that is, so long as your childhood wasn't spent in Arizona, Hawai'i, or select parts of Indiana, of course. In the spring, we set our clocks forward in hopes of "saving time" and -- supposedly -- saving energy. That hour of sleep we lose in the spring is repaid in the fall, supposedly with the dividend of kilowatts and energy dollars saved.
And, thanks to the Energy Policy Act of 2005, we will spring forward right early this year -- this coming Sunday morning, in fact. (You've been warned, lest you oversleep for church, brunch, or other Sunday morning activities!)
According to Aldrich, DST supporters say it saves energy (we don't have to turn on as many lights in the evening if it's still light out), prevents traffic accidents (by shifting the afternoon rush hour into daylight hours), and prevents crime (more daylight in the evening when folks are likely to be out and about).
Regardless, it's that time of year again, and while you may or may not like it (and I know of a scant few who really like losing that hour of sleep in the spring!) "Spring Forward" is coming. So, set those clocks!