title: How to convert Hijri (Islamic) date to Gregorian date
body: <p>I want to convert Hijri date to Gregorian date!
  I've searched, but unfortunately I found a java class for converting Gregorian to Hijri. I need the opposite.</p>
  
  <p>HijriCalendar.java: 
  <a href="https://gist.github.com/fatfingers/6492017" rel="nofollow">https://gist.github.com/fatfingers/6492017</a></p>