Check the polarity on your batteries to make sure they are installed according to the diagrams in the battery compartment. Also make sure that you are using a new good quality alkaline battery.

Press and release the + button to change your display options.

1. If you have not yet installed the batteries or plugged in the clock and it shows a time, remove the scratch-guard from the LCD panel.
   
2. This clock receives a signal from Ft. Collins, Colorado (WWVB) to set the clock to atomic time. Sometimes, due to adverse weather or atmospheric conditions you will not be able to receive a signal immediately. The best way to get a signal is to put your clock in a window facing Colorado until you see the tower icon appear.
   
3. If your time is off by an increment of 1 hour, change your time zone to match your location.

The segments that are highlighted will portray the part of the moon that is lit. For instance, the moon will be blank during a new moon and dark during a full moon. This is set by the tower in Ft. Collins and therefore needs a signal in order to read accurately. The Moon on the clock has only 4 segments to show all 28 days in a lunar month. This may cause the moon phase feature to be off by a few hours. For example a full moon may not show on the exact hour that your calendar may say the full moon is.