The timezone in Windows Server can be changed by using one of the following ways:
- Control panel GUI
- Windows command line
- Windows Powershell
In cases where Group Policy is applied (either local group policy or domain group policy), the settings of the time zone in the respective control panel field cannot be edited. In this case, using Powershell can do the trick.
Run the following Powershell cmdlets to change the timezone (example):
Set-Timezone -Name "GTB Standard Time"
The Set-TimeZone cmdlet documentation can be found at: https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.management/set-timezone?view=powershell-6
In order to make use of the appropriate time zone literals, use the following Microsoft article for reference: Default Time Zones.