Fix local_to_gmt()
diff --git a/system/helpers/date_helper.php b/system/helpers/date_helper.php
index 065a223..cafb6ba 100644
--- a/system/helpers/date_helper.php
+++ b/system/helpers/date_helper.php
@@ -304,13 +304,13 @@
 			$time = time();
 		}
 
-		return gmmktime(
-			date('G', $time),
-			date('i', $time),
-			date('s', $time),
-			date('n', $time),
-			date('j', $time),
-			date('Y', $time)
+		return mktime(
+			gmdate('G', $time),
+			gmdate('i', $time),
+			gmdate('s', $time),
+			gmdate('n', $time),
+			gmdate('j', $time),
+			gmdate('Y', $time)
 		);
 	}
 }