Samsung Galaxy tab3: Display time and date wrong.. system time and date ok.

1. Go to the settings app: On most tablets, the settings app can be found in the app drawer or on the home screen.
2. Locate the location settings: Look for a section labeled "Location" or "Location & Security". The location settings may be located under the "Device" or "System" section.
3. Turn on location services: Make sure that the location services toggle switch is turned on.
4. Change the home location: Look for a setting labeled "Home" or "Home Address". Tap on this option to open a map view. Use your finger to move the pin to the correct location.
5. Save the changes: Once you have the correct location set, tap on "Save" or "Set as Home".

Note: The steps may vary slightly depending on the specific model and operating system of your tablet. If you are unable to find the location settings, try searching for "location settings" in the device's search bar or help center.

Information is here

Amazon.com Help: Organize Apps on Your Fire Tablet Home ...

www.amazon.com > help > customer > display

Organize apps to customize your home screen experience. Note: Preinstalled apps can't be removed from your Fire tablet. To organize your apps: Select and ...

Step 1: Pull Down upper Status Bar - More +
Step 2: Select Date and Time
Step 3: Select Change Timezone
Step 4: Change to your preferred Timezone (British Summer Time is +1 GMT)

1.Press the power-key and volume-down key at the same time until the phone get into the recovery mode.
2.Press home key to get into next interface.
3.There will be four choices: reboot system now;apply update from external storage ;wipe data/factory reset;wipe cache partition.
4.Use "Vol+" and "Vol-" to move the cursor up and down.
5.press power key to select wipe data/factory reset.