title: Subtract days in batch file
body: <p>I'll try to subtract 60 days of the date of today but I don't know how I can do that.</p>
  
  <p>I've my date like this : </p>
  
  <pre><code>@echo off
  pause
  
  SET currentYear=%date:~9,4%
  ECHO %currentYear%
  SET month=%date:~6,2%
  ECHO %month%
  SET day=%date:~3,2%
  SET date=%day%%month%%currentYear%
  
  ECHO %day%
  ECHO %date%
  
  pause
  </code></pre>
  
  <p>I've look across internet but I don't find something simple and useful!</p>