Daylight Saving Time ends Sunday. Knoxville City Manager Aaron Adams tells KNIA/KRLS News he wants to remind residents to make the time switch. Adams says Daylight Saving Time is also a great time to check smoke alarm batteries as well. Clocks will gain an hour by repeating 2 a.m. Sunday morning. Only the state of Arizona and Hawaii are the only U.S. states that do not use Daylight Saving time.