title: The date command do not convert to time stamp the format returned by date command
body: <p>the date command of linux return the following date format</p>
  
  <pre><code>root@root:~# date
  Sat Jun 14 06:36:42 CEST 2014
  </code></pre>
  
  <p>The current date time stamp could be printed if I add +%s</p>
  
  <pre><code>root@root:~# date +%s
  1402720624
  </code></pre>
  
  <p>Now If I want to print the time stamp of the date returned by the date command, I get the following error</p>
  
  <pre><code>root@Inteno:~# date -d"Sat Jun 14 06:36:42 CEST 2014" +%s
  date: invalid date 'Sat Jun 14 06:36:42 CEST 2014'
  </code></pre>
  
  <p>How I can make the date return the time stamp of the date format <code>Sat Jun 14 06:36:42 CEST 2014</code> ?</p>
  
  <p><strong>Note:</strong> I m using date from BusyBox v1.19.4 </p>