Can't set the clock

Many rely on setting the time based on a GPS or cellular radio inside the device and / or setting the correct time zone or city that is the the same time zone you're in. if you need more help, provide the tablet manufacturer name and model.

If you have set the time correctly and it still won't keep the correct time then the clock must be faulty. How old's the tablet? Is it still under warranty? If not decide how critical it is to you to have the time. What's wrong with a watch or the clock on your 'phone?

I'm not sure why you have 2 clocks. Are they together in a widget? Or is one in the notification bar and one a widget?

My best guess is that you've got 2 timezones set up in world clock. Go to apps, world clock, delete the incorrect timezone.

Go to settings, look for clock etc. etc.

Unclick automatic settings and key in the correct time and date. Some of the Chinese tablets will default to Chinese time.

Click on the Settings icon, go to Date and Time, untick automatic if it's ticked (auto is used if you have it taking time from sim card) and enter the correct time.
that's it, good luck.

You can change the time zone manually by going to Settings > Date & Time > Disable Set Automatically and set the time

Which Kindle? I just did my paperwhite. Press the icon on top right..Has 3 horizontal bars..like dashes. Choose settings, device settings, device time. enter the time you want it to show. I just found out that the time did not change like phones do for daylight savings time.

To change the timezone.
Step 1: Pull down the upper status bar, More +
Step 2: Select Date and Time
Step 3: Select Timezone - change to the correct Timezone

Try to check the geographical location setting and time zone. It has to be set to the right location and time zone. Once your computer connects to the internet, it will try to sync with the right time in the internet. If that will not work, then it is with the CMOS battery. It will have to be replaced.