title: WEEK_OF_MONTH returns 0 while linux command returns 1
body: <p>For some weird reason.. <code>Calendar.getInstance().get(Calendar.WEEK_OF_MONTH)</code> returns <code>0</code>, while command in linux returns <code>1</code></p>
  
  <pre><code>root@ns4009576:~# echo $((($(date +%d)-1)/7+1))
  </code></pre>
  
  <blockquote>
    <p>1</p>
  </blockquote>
  
  <p>In the beginning i thought it could be that first day is Monday, so Sunday (today) is month 0 (?)
  but that doesn't seem to be the case either, locale returns Sunday as first day</p>
  
  <pre><code>root@ns4009576:~# locale day
  </code></pre>
  
  <blockquote>
    <p>Sunday;Monday;Tuesday;Wednesday;Thursday;Friday;Saturday</p>
  </blockquote>
  
  <p>Any help would be appreciated, thank you.</p>