diff --git a/install/data/constant_format.tpl b/install/data/constant_format.tpl
index 0e1a12c9..7535b324 100644
--- a/install/data/constant_format.tpl
+++ b/install/data/constant_format.tpl
@@ -24,6 +24,11 @@
 // ***** Name
 define("SERVER_NAME","%SERVERNAME%");
 
+// ***** Time zone added by ronix
+// Defines server time zone.
+define("TIMEZONE","%STIMEZONE%");
+date_default_timezone_set(TIMEZONE);
+
 // ***** Started
 // Defines when has server started.
 define("COMMENCE","%STARTTIME%");
@@ -283,4 +288,4 @@ $requse = 0;
 ##                                                                             ##
 #################################################################################
 
-?>
\ No newline at end of file
+?>