Model 86800 Every morning the clock has reset to four hours behind. I live in 4astern time zone.

Mine does that. i just select another time zone that has correct time and forget it, it is not a big deal.

Check the time zone setting for your local time zone. If you are Eastern Time Zone but setting is for Pacific Time Zone, then the difference will be several hours. Check your manual for proper setting.

To set up your clock simply install one fresh AA, LR6 ALKALINE battery. Due to the nature of long wave radio signals it is normally not possible to receive a signal during the day so it is best to install the battery late in the evening. Select your time zone by pressing one of the four time zone buttons PT-Pacific Time, MT-Mountain Time, CT-Central Time, ET-Eastern Time. The time zone buttons may be pressed any time after installing the batteries. If multiple buttons are pressed the clock will set to the time zone selected last. If no time zone is selected the clock will default to Pacific Time. Another time zone can be selected during or after the clock has set itself. Your clock can only set itself to one of the four time zones stated above. For time zones outside of PT, MT, CT or ET you must manually set the time using the Manual Time set button on the back of the movement.
When the battery is installed the second hand will advance eight seconds (two seconds per step x four steps). The clock is now searching for a signal. For the initial setting it is recommended to stand the clock in an upright position near a window. Within five minutes the clock will either receive the WWVB signal and set itself to the exact time, or it will determine that the signal is not receivable at its current location and time of day. If a signal is not receivable it will fast-forward the hands to the 4, 8, or 12 o'clock position and search for WWVB each
hour until a signal is received. If the time is manually set the clock will continue to periodically search for a signal and automatically reset the hands when the signal is received.

Hello
You haven't given any details about your clock, ie, its Model number, brand name etc. Yet I posts this solution, as these are the genteral proceedings to reset a radio clontrolled clock.

To set up your clock simply install one fresh AA, LR6 ALKALINE battery. Due to the nature of long wave radio signals it is normally not possible to receive a signal during the day so it is best to install the battery late in the evening. Select your time zone by pressing one of the four time zone buttons PT-Pacific Time, MT-Mountain Time, CT-Central Time, ET-Eastern Time. The time zone buttons may be pressed any time after installing the batteries. If multiple buttons are pressed the clock will set to the time zone selected last. If no time zone is selected the clock will default to Pacific Time. Another time zone can be selected during or after the clock has set itself. Your clock can only set itself to one of the four time zones stated above. For time zones outside of PT, MT, CT or ET you must manually set the time using the Manual Time set button on the back of the movement.
When the battery is installed the second hand will advance eight seconds (two seconds per step x four steps). The clock is now searching for a signal. For the initial setting it is recommended to stand the clock in an upright position near a window. Within five minutes the clock will either receive the WWVB signal and set itself to the exact time, or it will determine that the signal is not receivable at its current location and time of day. If a signal is not receivable it will fast-forward the hands to the 4, 8, or 12 o'clock position and search for WWVB each

hour until a signal is received. If the time is manually set the clock will continue to periodically search for a signal and automatically reset the hands when the signal is received.
Select a location to place your radio controlled clock where it will be at least six feet away from a TV, computer, air conditioner or other household electrical appliances. The optimal location is near a window. Windows facing Colorado providing the best signal. The WWVB time signal will easily penetrate Masonry and wood framed buildings. WWVB will penetrate almost every residential building and most steel buildings if they have adequate windows. It is not possible, however, for WWVB to penetrate most indoor shopping malls and rooms in the center of large office buildings that do not have windows. In buildings that WWVB cannot penetrate you may set the time using the manual time set button. When the clock is exposed to the WWVB signal it will automatically set the hands to the exact time. OK.

It's most likely because of Daylight Saving Time. Your clock receives a signal through the air once a day from the actual atomic clock, much like a cell phone receives the time from your cell phone service provider, and it automatically resets itself to the exact time each time it receives this signal. Remember that the middle of the year (the second Sunday in March until the first Sunday in November in the US) is Daylight Saving Time for much of the United States. The clock has an option that allows you to set whether you are observing Daylight Saving Time or not. If this is set to "off", the time will be one hour behind until Daylight Saving Time ends (November 7th). Make sure this is set properly, and your problem will be solved.

Make sure that the clock is set for the correct time zone and that the DST (Daylight Saving Time) function is ON. Also, although not mentioned in the manuals, these clocks will typically jump and hour ahead or behind when the batteries get weak. Replace your batteries if they are more than a year old.

Bill B

How to Change the Time Zone
Press and hold the “-“ button for 3 seconds the letter P will appear where the seconds are than press and release the “-“ button until the correct letter for your time zone appears. The four time zones are P is Pacific, M is Mountain, C is Central and E is Eastern Time zone. Press the SET button to confirm or leave the setting to confirm and exit automatically.

-Make sure clock is in radio sync mode. This is in the manual so won't repeat here.
-Press & release SELECT. Clock time numbers should flash
-Press & hold SELECT. It should enter clock settings mode
-Bottom of screen next to moon phase you should see the current time zone. PST after reset
-UP & DOWN will move through time zones.
-Press & release SELECT when done.
-Each time SELECT is pressed will move to a new setting like 12/24 hour etc.
-Press SELECT until clock numbers stop blinking or leave it alone to return to normal mode
-This should also work on the other Oregon Scientific Starck models.

Hi. There should be a switch on top of the radio that allows you to select the time zone. It is just behind the snooze bar and labeled PST-MST-CST-EST. Try that.