diff --git a/inc/RRule.php b/inc/RRule.php
index 0c570a56..3bfa6a5f 100644
--- a/inc/RRule.php
+++ b/inc/RRule.php
@@ -173,6 +173,14 @@ class iCalDate {
   }
 
 
+  /**
+  * Render the date as GMT
+  */
+  function RenderGMT( $fmt = 'Ymd\THis\Z' ) {
+    return gmdate( $fmt, $this->_epoch );
+  }
+
+
   /**
   * No of days in a month 1(Jan) - 12(Dec)
   */