Setting a windows batch file variable to the day of the week

Question

I have a windows batch file that runs daily. Wish to log data into a file and want to rotate it (i.e. having at most the last 7 days worth of data).

Looked into the

Answer 1

If you can change format of short date in the PC to "ffffd yyyy-MM-dd" (only first parameter 'ffffd' is compulsory), then following command returns-

c:\>vol | date
The current date is: Mon 2014-12-01

Then you can write you batch file -

@echo off

vol | date | find /i "sun" > nul 
if not errorlevel 1 goto SUN

vol | date | find /i "mon" > nul 
if not errorlevel 1 goto MON

      # write block for other week days    

goto END

:SUN
set fname="sun"
goto BACKUP

:MON
set fname="mon"
goto BACKUP

      # write block for other week days

:BACKUP
echo %fname%

:END