Date-time strings to use in filenames

The DATE command in a Windows command console shows the date which is not suited for filenames, because of spaces and slashes or, with other country/language settings, colons or other characters that are not allowed in filenames:

These commands (in a Batch script) creates date-time formatted strings, that can be used in filenames:

 

REM *** With Powershell...

for /f "usebackq" %%i in (`powershell -command get-date -format 'yyyyMMdd-HHmmss'`) do set psDateTime=%%i

set TimeStamp=%psDateTime%

echo %timeStamp%-filename.ext

REM *** With WMIC...

for /f %%i in ('wmic os get LocalDateTime /value ^| find "="') do set wmicDateTime=%%i

set TimeStamp=%wmicDateTime:~14,8%-%wmicDateTime:~22,6%

echo %timeStamp%-filename.ext 

 

Result: