title: moment js to convert date from one format to other
body: <p>I am using moment js to convert date variable format</p>
  
  <pre><code>moment("23MAY68", 'DDMMMYY').format('YYYY-MM-DD');
  moment("23MAY99", 'DDMMMYY').format('YYYY-MM-DD');
  </code></pre>
  
  <p>Until the year 68, the output is 2068. From the year 69, the output is 1969 and not 2069. Is there a syntax or parameter in moment.js where I can mention it to use 2069 and not 1969?</p>
  
  <p><a href="http://plnkr.co/edit/ljXuskMsUAuJnpkqMPUn?p=preview" rel="noreferrer">http://plnkr.co/edit/ljXuskMsUAuJnpkqMPUn?p=preview</a></p>