主要是摘抄自互联网
@echo off&setlocal enabledelayedexpansion
set yyyy=%date:~0,4%
set mm=%date:~5,2%
set dd=%date:~8,2%
set /a od=!dd!-2
if !od!==0 call :dd0
if !mm!==0 call :mm0
set yyyymmdd=!yyyy!-!mm!-!od!
move /Y c:/temp/!yyyymmdd! c:/temp/backup/!yyyymmdd!
pause
:dd0
set /a mm=!mm!-1
for %%a in (1 3 5 7 8 10 12)do set %%add=31
set /a pddd=!yyyy!*10/4
set pd2d=!pddd:~-1,1!
set 2dd=28
if !pd2d!==0 set 2dd=29
for %%b in (4 6 9 11)do set %%bdd=30
set od=!%mm%dd!
goto :eof
:mm0
set /a yyyy=!yyyy!-1
set mm=12 && set od=31
goto :eof