1 files changed, 5 insertions, 5 deletions

diff --git a/node_modules/montage/core/converter/date-converter.js b/node_modules/montage/core/converter/date-converter.js
index f0d3e540..f484f7aa 100755
--- a/node_modules/montage/core/converter/date-converter.js
+++ b/node_modules/montage/core/converter/date-converter.js
@@ -2502,16 +2502,13 @@ var _toString = Object.prototype.toString;
 var isDate = function(object) {
     return _toString.call(object) === DATE_CLASS;
 };
-var isString = function(object) {
-    return _toString.call(object) === STRING_CLASS;
-};
 var isNumber = function(object) {
     return _toString.call(object) === NUMBER_CLASS;
 };
 
 var formatDate = function(v, format) {
     var date;
-    if (isString(v)) {
+    if (String.isString(v)) {
         // try to create a Date instance from the string
         // date must be a string that can be parsed by Date
         // see - http://www.w3schools.com/jsref/jsref_parse.asp
@@ -2605,7 +2602,7 @@ var DateConverter = exports.DateConverter = Montage.create(Converter,/** @lends
     */
     convert: {
         value: function(v) {
-            if (isDate(v) || isString(v) || isNumber(v)) {
+            if (isDate(v) || String.isString(v) || isNumber(v)) {
                 return formatDate(v, this.pattern);
             }
             return v;
@@ -2617,6 +2614,9 @@ var DateConverter = exports.DateConverter = Montage.create(Converter,/** @lends
     */
     revert: {
         value: function(v) {
+            if(isDate(v)) {
+                return v;
+            }
             this.validator.pattern = this.pattern;
 
             var result = this.validator.validate(v);