Stop the time service then change the clock from elevated command
1 2 3 | net stop w32time date 4/22/2021 net start w32time |
NOTE: the clock does switch back periodically, to permanently disable the clock changes use
1 2 3 4 | W32TM /unregister date 4/22/2021 W32TM /register W32TM /resync |
This removes the Windows Time NT service, side effects could occur if the NT service isnt added back to the OS