Sunday at 2am is time to “spring ahead” an hour, a time change that the AAA says may cause driving challenges for motorists who will lose an hour’s sleep.  AAA Connecticut Spokeswoman Fran Mayko says commuters may suddenly find themselves driving into the rising or setting sun, depending on their direction.  Greater Danbury area fire departments are reminding residents that when they change their clocks, to also change batteries in smoke and carbon monoxide detectors.