Clocks are moving back an hour this Sunday for the end of Daylight Saving Time. On the first Sunday of November, clocks roll back one hour at 2 a.m. for most of the U.S. including Iowa. Residents are encouraged to set their clocks back before heading to bed Saturday night. While you’re changing clocks around the home it’s a recommended time to check or change your smoke and carbon monoxide detectors twice annually.