Convert epoch of Taiwan to AD

epoch of Taiwan to AD

/* Epoch used in Taiwan started since 1911 AD. For example, this year (2015 AD) in Taiwan epoch is 中華民國 104 年
   Often we need to different epoch notation between system/languages */
/* From String to JavaScript
   Taiwan epoch notation -- '104.01.29'
   AD -- Thu Jan 29 2015 22:27:19 GMT+0800 (CST) */

var str2JSdate = function( str ) {
  var dt = new Date();
  var date_arr = str.split('.');
  dt.setFullYear( parseInt( date_arr[0] ) + 1911 );
  dt.setMonth( parseInt( date_arr[1] ) - 1 );
  dt.setDate( date_arr[2] );
  return dt;
}

/* Usage, provide string 'yyy.mm.dd' as function parameter */
var date_string = '104.01.29';
console.log( str2JSdate( date_string ));
/* return Thu Jan 29 2015 22:35:27 GMT+0800 (CST) */