Question: how to change date format in windows server 2012 for all users?
Answer: Navigate to the HKEY_USERS\Default User\Control Panel\International registry subkey. Double-click the sShortDate registry entry. Set the value to the date format required (e.g., dd/MM/yyyy), then click OK. You can also change the sLongDate registry entry for the longer date format (e.g., dd MMMM yyyy), then click OK.