diff --git a/common.php b/common.php
index ce258eb7b..303b4be32 100644
--- a/common.php
+++ b/common.php
@@ -95,6 +95,7 @@ if (file_exists($dbconfig_file)) {
     $connect_db = sql_connect(G4_MYSQL_HOST, G4_MYSQL_USER, G4_MYSQL_PASSWORD) or die('MySQL Connect Error!!!');
     $select_db  = sql_select_db(G4_MYSQL_DB, $connect_db) or die('MySQL DB Error!!!');
     @mysql_query(" set names utf8 ");
+    if (defined(G4_TIMEZONE)) @mysql_query(" set time_zone = '".G4_TIMEZONE."'"); 
 } else {
 ?>
 
diff --git a/config.php b/config.php
index cfa9fd5a2..b7c1da162 100644
--- a/config.php
+++ b/config.php
@@ -6,9 +6,11 @@
 // 이 상수가 정의되지 않으면 각각의 개별 페이지는 별도로 실행될 수 없음
 define('_GNUBOARD_', true);
 
+define('G4_TIMEZONE', 'Asia/Seoul');
+
 if (PHP_VERSION >= '5.3.0') {
     //if (function_exists("date_default_timezone_set")) date_default_timezone_set("Asia/Seoul");
-    date_default_timezone_set("Asia/Seoul");
+    date_default_timezone_set(G4_TIMEZONE);
 }
 
  //==============================================================================