title: Issue with moment.js method: moment.tz.guess() in Chrome Browser
body: <p>I am having an issue with comparing zone values in my code, it's sort of a bug from what i understand.</p>
  
  <p><strong>My requirement</strong>: compare the timezone we get from moment with the one i have in array and set it somewhere.
  I get value from moment.js using <strong>moment.tz.guess()</strong> and i compare it with the timezones value/name i have present in my local array.</p>
  
  <p><strong>Issue Faced</strong>: Only in case of Google Chrome browser, i am getting value of <strong>moment.tz.guess()</strong> as <strong>Asia/Calcutta</strong> whereas in case of Firefox and IE/Edge, i am getting <strong>Asia/Kolkata</strong>.</p>
  
  <p>My local array has value/name as Asia/Kolkata, hence, i am not able to compare the values in Chrome browser, but i am able to get correct comparison in other mentioned browsers.</p>
  
  <p>This is a timezone specific issue as earlier Asia/Kolkata was Asia/Calcutta.</p>
  
  <p>Also, i am using latest version of moment.js and have the latest versions of the browsers in my system installed, so i'm not sure where the issue is.
  Also, i'm using angularJS 1.6 as my main framework for UI.</p>
  
  <p>Any help would be appreciated.</p>
  
  <p>Below is a simple Fiddle of the actual issue at my side what comes as moment.tz.guess()</p>
  
  <pre><code>&lt;script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment.min.js"&gt;&lt;/script&gt;
  &lt;script src="//cdnjs.cloudflare.com/ajax/libs/moment-timezone/0.5.11/moment-timezone-with-data-2010-2020.min.js"&gt;&lt;/script&gt;
  &lt;script&gt;
  var timezone = moment.tz.guess();
  alert(timezone);
  </code></pre>
  
  <p><a href="http://jsfiddle.net/wcu21kr5/3125/" rel="nofollow noreferrer">http://jsfiddle.net/wcu21kr5/3125/</a></p>
  
  <p>it gives different values in Chrome vs Firefox (Calcutta vs Kolkata), the correct and latest one Kolkata</p>
  
  <p>For the time being, in my code, what i have done is i have directly compared the string value from my array and the one i get from moment.tz.guess() and then consider them as equal and then proceed.</p>
  
  <p>This way my application works, but it's sort of a hard code check for a specific case, what if there's change in other timezone city names? adding new city each time isn't a good option</p>