diff --git a/src/definitions/modules/calendar.js b/src/definitions/modules/calendar.js
index cef8747..1a979e8 100644
--- a/src/definitions/modules/calendar.js
+++ b/src/definitions/modules/calendar.js
@@ -19,6 +19,12 @@
     : Function('return this')()
   ;
 
+  // form validation for type 'date'
+  // note that Semantic passes the date as it's shown as a string, so we have to convert to date to validate
+  $.fn.form.settings.rules.date = function(value) {
+     return value && typeof value == "string" && value.length > 6 && !isNaN(new Date(value).getTime());
+  }
+  
   $.fn.calendar = function (parameters) {
 
     var