diff --git a/inc/RRule.php b/inc/RRule.php
index 6f9d9fac..2a54bf8e 100644
--- a/inc/RRule.php
+++ b/inc/RRule.php
@@ -178,7 +178,7 @@ class iCalDate {
   * Render the date as GMT
   */
   function RenderGMT( $fmt = 'Ymd\THis\Z' ) {
-    return gmdate( $fmt, $this->_epoch );
+    return date( $fmt, $this->_epoch );
   }