--- clientside_validation.js	2013-02-08 11:55:10.809983272 +0000
+++ clientside_validation.js	2013-02-08 11:51:08.853992998 +0000
@@ -1163,48 +1163,63 @@
     });
 
     jQuery.validator.addMethod("dateFormat", function(value, element, param) {
-      var parts = value.split(param.splitter);
-      var expectedpartscount = 0;
-      var day = parseInt(parts[param.daypos], 10);
-      var month = parseInt(parts[param.monthpos], 10);
-      month = month - 1;
-      var year = parseInt(parts[param.yearpos], 10);
-      var date = new Date();
-      var result = true;
-      if (day.toString().length !== parts[param.daypos].length){
-        result = false;
-      }
-      if (month.toString().length !== parts[param.monthpos].length){
-        result = false;
-      }
-      if (year.toString().length !== parts[param.yearpos].length){
-        result = false;
-      }
-      if (param.yearpos !== false){
-        expectedpartscount++;
-        date.setFullYear(year);
-        if (year !== date.getFullYear()) {
+      try{
+        var parts = value.split(param.splitter);
+        var expectedpartscount = 0;
+        var day = parseInt(parts[param.daypos], 10);
+
+        var month = parseInt(parts[param.monthpos], 10);
+        if (isNaN(month)) {
+          if (typeof Drupal.settings.clientside_validation_settings[parts[param.monthpos]] !== undefined) {
+            month = Drupal.settings.clientside_validation_settings[parts[param.monthpos]];
+          }
+          else {
+            month = new Date(parts[param.monthpos] + " 1, 2000");
+            month = month.getMonth();
+          }
+        }
+        month = month - 1;
+
+        var year = parseInt(parts[param.yearpos], 10);
+        var date = new Date();
+        var result = true;
+        if (parts[param.daypos].toString().length !== parts[param.daypos].length){
           result = false;
         }
-      }
-      if (param.monthpos !== false) {
-        expectedpartscount++;
-        date.setMonth(month);
-        if (month !== date.getMonth()) {
+        if (parts[param.monthpos].toString().length !== parts[param.monthpos].length){
           result = false;
         }
-      }
-      if (param.daypos !== false) {
-        expectedpartscount++;
-        date.setDate(day);
-        if (day !== date.getDate()) {
+        if (parts[param.yearpos].toString().length !== parts[param.yearpos].length){
           result = false;
         }
+        if (param.yearpos !== false){
+          expectedpartscount++;
+          date.setFullYear(year);
+          if (year !== date.getFullYear()) {
+            result = false;
+          }
+        }
+        if (param.monthpos !== false) {
+          expectedpartscount++;
+          date.setMonth(month);
+          if (month !== date.getMonth()) {
+            result = false;
+          }
+        }
+        if (param.daypos !== false) {
+          expectedpartscount++;
+          date.setDate(day);
+          if (day !== date.getDate()) {
+            result = false;
+          }
+        }
+        if (expectedpartscount !== parts.length) {
+          result = false;
+        }
+        return this.optional(element) || result;
+      } catch(e) {
+        return this.optional(element) || false;
       }
-      if (expectedpartscount !== parts.length) {
-        result = false;
-      }
-      return this.optional(element) || result;
     }, jQuery.format('The date is not in a valid format'));
 
     // Require one of several