ENGCOM-1565: [Backport] Fixed datepicker problem when using non en-US locale. #15222

 - Merge Pull Request #15222 from rogyar/magento2:2.1-non-us-locale-datepicker
 - Merged commits:
   1. b751792

Author: magento-engcom-team

lib/web/mage/utils/misc.js

@@ -245,7 +245,7 @@ define([
         convertToMomentFormat: function (format) {
             var newFormat;
 
-            newFormat = format.replace(/yy|y/gi, 'YYYY'); // replace the year
+            newFormat = format.replace(/yyyy|yy|y/, 'YYYY'); // replace the year
             newFormat = newFormat.replace(/dd|d/g, 'DD'); // replace the day
 
             return newFormat;