Besides the time, the date is also automatically obtained from the network and set on the Huawei smartphone by default. If
we want to set the date manually, the automatic must be disabled.

Android 10 | EMUI 10.0
Set date -  Open the  Settings
Set date -  Tap on  System & updates
Set date -  Tap on  Date & time
Set date -  Disable  Set automatically
Set date -  Tap on  Date
Set date -  Set the  date  and tap  OK
  1. Open the Settings
  2. Tap on System & updates
  3. Tap on Date & time
  4. Disable Set automatically
  5. Tap on Date
  6. Set the date and tap OK

Huawei Instructions