the time is set automatically on the Samsung device. source for this is the mobile network. in rare cases, the time may also be incorrect. in the general management settings of the Samsung device, we can disable the automatic time and change it manually.

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  General management
Step 3:  Tap on  Date and time
Step 4:  Disable  Automatic date and time
Step 5:  Tap on  Set time
Step 6:  Set desired  time  and confirm with  Done
  1. Open the Settings
  2. Tap on General management
  3. Tap on Date and time
  4. Disable Automatic date and time
  5. Tap on Set time
  6. Set desired time and confirm with Done

Samsung Instructions
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