Get ready for an extra hour of sleep Saturday night. That's when we leave Daylight Saving Time and go back to Standard Time.

The official change takes place Sunday Nov. 6 at 2 a.m., but most people reset their clocks as they go to bed Saturday night.

Fire experts are quick to remind us to use the occasion as a reminder to change smoke detector and carbon monoxide detector batteries.

More after the jump.

Also, don't forget to change the time on your programmable thermostat, outdoor lighting timer, coffee maker, microwave and oven.

So, why does most of the country change time twice a year? Check out the National Geographic website for a history of our efforts to "save time."