As an administrator for a Windows network, scripting to automate tasks becomes more of a necessity. Here is a simple script for a batch file to append the current date to log files:
For /f "tokens=2-4 delims=/ " %%a in ('date /t') do (set date=%%a-%%b-%%c)
REM This sets a variable %date% to the current date.
REM Just append %date% to the log (output) file name.
REM Use >logfile%date%.log to create a new log file or >>logfile%date%.log to append to the log file.