title: Regex Persian Date validation
body: <p>I want a <strong>Regular Expression</strong> for validation Persian date like <code>1396/4/3</code>, <code>1396/12/08</code> or something else. 
  <br/>in other words, I want to ensure that format of Persian Date (as <code>String</code>) is some thing like these valid formats are:</p>
  
  <p>1.<code>YYYY/MM/DD</code></p>
  
  <p>2.<code>YYYY/MM/D</code></p>
  
  <p>3.<code>YYYY/M/DD</code></p>
  
  <p>4.<code>YYYY/M/D</code></p>
  
  <p><br/>any Solution?</p>