Follow the given steps to update the Time & Date format in IIS on Windows 10:
Step-1. Go to the search bar & search for Control Panel.
Step-2. Open Control Panel.
Step-3. Click on Region Option.
Step-4. In the Region Tab, click on Additional Settings.
Step-5. Change the date & time format in dd/MM/yy format and click on ‘OK’ button.
Step-6. Now, go to Administrative Tab, and click on the Copy Settings button.
Step-7. Select the two options under “Copy your current settings to:” option & click on OK button.
Step-8. Now, Logoff and Login to your system, or you can restart the computer.