批处理日期相关脚本

@echo off
set year=1%date:~2,2%
set month=1%date:~5,2%
set /a day=1%date:~8,2%-4
set "num=%time::=-%"

if "%day%"=="100" set /a month=%month%-1+100
if "%day%"=="100" set day=131

if "%month%"=="200" set /a year=%year%-1
if "%month%"=="200" set month=212
if "%month%"=="202" set day=129
if "%month%"=="204" set day=130
if "%month%"=="206" set day=130
if "%month%"=="209" set day=130
if "%month%"=="211" set day=130
@echo on