As Daylight Savings Time Begins On Sunday, Besides Changing Your Clocks, It’s Also A Good Time To Change The Batteries In Your Smoke Detector. Barry Brickey With The Kingsport Fire Department Said Roughly Two Thirds Of Home Fire Deaths Happen In Homes With No Smoke Alarms Or Working Smoke Alarms. He Added It’s Also A Good Idea To Test Smoke Alarms At Least Once A Month.