C:\Windows\System32>tzutil /?
Windows Time Zone Utility

Usage:
TZUTIL </? | /g | /s TimeZoneID[_dstoff] | /l>

Parameters:
    /? Displays usage information.

    /g Displays the current time zone ID.

    /s TimeZoneID[_dstoff]
       Sets the current time zone using the specified time zone ID.
       The _dstoff suffix disables Daylight Saving Time adjustments
       for the time zone (where applicable).

    /l Lists all valid time zone IDs and display names. The output will
       be:
           <display name>
           <time zone ID>

Examples:
    TZUTIL /g
    TZUTIL /s "Pacific Standard Time"
    TZUTIL /s "Pacific Standard Time_dstoff"

Remarks:
    An exit code of 0 indicates the command completed successfully.

C:\Windows\System32>