This weekend is the official end of Daylight Saving Time. You will need to set your clock back one hour before you go to bed Saturday or at 2 a.m. Sunday local time when the official fall back begins. The Indiana State Fire Marshal is urging Hoosiers to change batteries in their smoke alarms at the same time. Smoke detectors are relatively inexpensive and officials encourage you to have a smoke alarm outside of each sleeping area. At the minimum, there should be one alarm on each floor of the home, including the basement.