title: JavaScript MM/DD/YYYY date validation
body: <p>Can Some one Please help with the below?</p>
  
  <p>I got below Regex expression to validate <code>"MM/DD/YYYY"</code> from <code>&lt;a href="http://stackoverflow.com/questions/15491894/regex-to-validate-date-format-dd-mm-yyyy/31613437#31613437?newreg=51e1ed3c1b2d468fa7a1cab86a40eb51"&gt;clickhere&lt;/a&gt;</code>, but I need the validation of year to be from 1900 and dates should be a valid calendar date.</p>
  
  <h2>Regular Expression</h2>
  
  <pre><code>/^(?:(?:(?:0[13578]|1[02])(\/)31)\1|(?:(?:0[1,3-9]|1[0-2])(\/)(?:29|30)\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:02(\/)29\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:(?:0?[1-9])|(?:1[0-2]))(\/)(?:0[1-9]|1\d|2[0-8])\4(?:(?:1[6-9]|[2-9]\d)?\d{2})$/
  </code></pre>