Change time and date for Surface Pro in UEFI/BIOS

ACCESSING THE UEFI (OR BIOS)

You can adjust the UEFI settings only during system startup. To load the UEFI firmware settings menu:

Shut down your Surface and wait about 10 seconds to make sure it's off.
Press and hold the volume-up button on your Surface, and, at the same time, press and release the power button.
The Microsoft or Surface logo appears on your screen. Continue to hold the volume-up button. Release the button once the UEFI screen appears.

You can also load the UEFI firmware settings menu through Windows. To do this:

Select Start > Settings > Update & security > Recovery.
Under Advanced startup, select Restart Now.
Under Choose an option, select Troubleshoot > Advanced Options > UEFI Firmware Settings, and then select Restart.

Adjusting date and time

In the Date and Time section, you can manually enter a new date and time.

Reference: https://support.microsoft.com/en-us/surface/how-to-use-surface-uefi-df2c8942-dfa0-859d-4394-95f45eb1c3f9#WindowsVersion=Windows_10