Daylight Saving Time: When You Change Your Clocks, Change the Batteries in Your Smoke Detector March 5, 2017 Email 3-5-2017 March 12 is the beginning of Daylight Saving Time, which means we have to move the clocks forward an hour. But Daylight Saving Time is also the perfect time to check your smoke detectors and change the batteries! When it comes to fire safety, it’s always better safe than sorry. When you change your batteries, remember to recycle your old ones. Never throw batteries in the trash — they contain dangerous metals and corrosive chemicals that can leach into the environment. Find out how to recycle batteries here.