:: adapted from http://stackoverflow.com/a/10945887/1810071
@echo off
for /f "skip=1" %%x in ('wmic os get localdatetime') do if not defined MyDate set MyDate=%%x
for /f %%x in ('wmic path win32_localtime get /format:list ^| findstr "="') do set %%x
set fmonth=00%Month%
set fday=00%Day%
set today=%Year%-%fmonth:~-2%-%fday:~-2%
echo %today%