Logs Named By Current DateTime

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I have a scheduled task and I’d like to save logs from the output. After some quick batch file work, I came up with this.

@echo off
setlocal

for /f "tokens=2" %%A in ('date /t') DO @(set MyDate=%%A)
set MyDate=%MyDate:/=-%

set MyTime=%TIME::=-%
set MyTime=%MyTime:.=-%
set MyFilename=%MyDate%_%MyTime%.log

echo Writing output to %MyFilename%
mytask.exe > %MyFilename%

endlocal

I end up with filenames like 10-02-2009_14-34-56-00.log which gets the point across. Do you have a better way to accomplish this?