diff --git a/database/myems_user_db.sql b/database/myems_user_db.sql
index a65c6799..c23aacb2 100644
--- a/database/myems_user_db.sql
+++ b/database/myems_user_db.sql
@@ -97,10 +97,10 @@ DROP TABLE IF EXISTS `myems_user_db`.`tbl_action_logs` ;
 CREATE TABLE IF NOT EXISTS `myems_user_db`.`tbl_action_logs` (
   `id` BIGINT NOT NULL AUTO_INCREMENT,
   `user_name` VARCHAR(256) NOT NULL,
-  `date_time` DATETIME NOT NULL,
+  `date_time_utc` DATETIME NOT NULL,
   `action` VARCHAR(256) NOT NULL,
   `class` VARCHAR(256) NOT NULL,
   `record_id` BIGINT NULL,
   `record_text` JSON NULL,
   PRIMARY KEY (`id`));
-CREATE INDEX `tbl_action_logs_index_1` ON  `myems_user_db`.`tbl_action_logs`  (`user_name`, `date_time`, `action`);
+CREATE INDEX `tbl_action_logs_index_1` ON  `myems_user_db`.`tbl_action_logs`  (`user_name`, `date_time_utc`, `action`);
diff --git a/myems-api/log.py b/myems-api/log.py
index d89903c4..dc3e89e0 100644
--- a/myems-api/log.py
+++ b/myems-api/log.py
@@ -15,7 +15,7 @@ def write_log(user_uuid, action, _class, record_id, record_text):
     :param record_id: int
     :param record_text: str
     """
-    now = datetime.now()
+    now = datetime.utcnow()
     cnx = None
     cursor = None
     try:
@@ -35,7 +35,7 @@ def write_log(user_uuid, action, _class, record_id, record_text):
         cnx = mysql.connector.connect(**config.myems_user_db)
         cursor = cnx.cursor()
         add_row = (" INSERT INTO tbl_action_logs "
-                   "    (user_name, date_time, action, class, record_id, record_text) "
+                   "    (user_name, date_time_utc, action, class, record_id, record_text) "
                    " VALUES (%s, %s, %s, %s, %s , %s) ")
         cursor.execute(add_row, (user['name'],
                                  now,
@@ -47,10 +47,6 @@ def write_log(user_uuid, action, _class, record_id, record_text):
         cnx.commit()
     except Exception as e:
         print(str(e))
-        if cnx:
-            cnx.disconnect()
-        if cursor:
-            cursor.close()
     finally:
         if cnx:
             cnx.disconnect()
@@ -77,10 +73,6 @@ def judge_admin(user_uuid):
         return user["admin"]
     except Exception as e:
         print(str(e))
-        if cnx:
-            cnx.disconnect()
-        if cursor:
-            cursor.close()
         return False
     finally:
         if cnx: