Don't forget: For most of us in the U.S., it's almost time to change the clocks.

"Fall back" an hour at 2 a.m. Sunday (we'll "spring ahead" next ... Spring).

As All Things Considered reported last March, there's reason to doubt that changing the clocks each Spring and Fall accomplishes what some had hoped — saving energy.

But lots of folks like having the extra hour of evening light in the summer.

Your opinion?

For a brief history of Daylight Saving Time, check out this story from National Geographic.

Oh, and a reminder: Those of you in Arizona and Hawaii don't have to do a thing. (One exception: The Navajo Nation in northeastern Arizona, does change its clocks.)