diff --git a/clientside_validation.js b/clientside_validation.js
index db5d641..bfc94d6 100644
--- a/clientside_validation.js
+++ b/clientside_validation.js
@@ -1179,15 +1179,26 @@
 
         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]];
+          var date_parts = param.format.split(param.splitter);
+          var full_idx = date_parts.indexOf("F");
+          var abbr_idx = date_parts.indexOf("M");
+          var mopos = Math.max(full_idx, abbr_idx);
+          if (parseInt(mopos) > -1) {
+            param.monthpos = mopos;
+            date = new Date(parts[param.monthpos] + " 1, 2000");
+            month = date.getMonth();
           }
           else {
-            month = new Date(parts[param.monthpos] + " 1, 2000");
-            month = month.getMonth();
+            if (typeof Drupal.settings.clientside_validation_settings[parts[param.monthpos]] !== undefined) {
+              month = Drupal.settings.clientside_validation_settings[parts[param.monthpos]];
+              //month = month - 1;
+            }
+            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();
@@ -1201,10 +1212,10 @@
         if (parts[param.yearpos].toString().length !== parts[param.yearpos].length){
           result = false;
         }
-        if (param.yearpos !== false){
+        if (param.daypos !== false) {
           expectedpartscount++;
-          date.setFullYear(year);
-          if (year !== date.getFullYear()) {
+          date.setDate(day);
+          if (day !== date.getDate()) {
             result = false;
           }
         }
@@ -1215,10 +1226,10 @@
             result = false;
           }
         }
-        if (param.daypos !== false) {
+        if (param.yearpos !== false){
           expectedpartscount++;
-          date.setDate(day);
-          if (day !== date.getDate()) {
+          date.setFullYear(year);
+          if (year !== date.getFullYear()) {
             result = false;
           }
         }