If the time changes or is off by an hour or more:
- Check to make sure you have selected your proper time zone.
- If you observe Daylight Saving Time, make sure that DST is always turned ON.
- Make sure you are using good quality, alkaline batteries. DO NOT use rechargeable or heavy-duty batteries.
- If the unit is atomic it will automatically correct itself with the date and time once it picks up the atomic signal. Try moving the unit to a window facing Colorado overnight (signal is better at night) so it can gain a strong connection. If it continues to change, you may want to relocate the unit to a different location in your home.