diff --git a/include/common/ttimezone.h b/include/common/ttimezone.h
deleted file mode 100644
index cc50a29d57a2f1a308b8b236fc7bb80122adb387..0000000000000000000000000000000000000000
--- a/include/common/ttimezone.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
- *
- * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef _TD_COMMON_TIMEZONE_H_
-#define _TD_COMMON_TIMEZONE_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void tsSetTimeZone();
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /*_TD_COMMON_TIMEZONE_H_*/
diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index eeb9b110c514b900ecef04a8829570827f0e9a4a..f07048efbc0ed151ca63dbe782626d7078105a37 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -25,7 +25,6 @@
 #include "tref.h"
 #include "trpc.h"
 #include "ttime.h"
-#include "ttimezone.h"
 
 #define TSC_VAR_NOT_RELEASE 1
 #define TSC_VAR_RELEASED 0
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index 5946232c8557820c4c090795f015f9672fe7db29..e26dbb639a66ebc530e0a41ae9afa702fb598420 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -23,7 +23,6 @@
 #include "tglobal.h"
 #include "tlocale.h"
 #include "tlog.h"
-#include "ttimezone.h"
 #include "tutil.h"
 #include "ulog.h"
 
diff --git a/source/dnode/mgmt/daemon/src/dmnCfg.c b/source/dnode/mgmt/daemon/src/dmnCfg.c
index b09866fa7bf50cf294d3614d2e225b9d870889dd..9215fb6699433aad7888d9c72ab8fc382f21c9b3 100644
--- a/source/dnode/mgmt/daemon/src/dmnCfg.c
+++ b/source/dnode/mgmt/daemon/src/dmnCfg.c
@@ -16,7 +16,6 @@
 #define _DEFAULT_SOURCE
 #include "dmnInt.h"
 #include "tlocale.h"
-#include "ttimezone.h"
 
 static int32_t dmnAddEpCfg(SConfig *pCfg) {
   char defaultFqdn[TSDB_FQDN_LEN] = {0};
diff --git a/source/libs/config/src/config.c b/source/libs/config/src/config.c
index 0b2680f08ece7b26800eb23eddd942ec5c40a8f4..f877b22046e4e5cf0620513e389881a217efecab 100644
--- a/source/libs/config/src/config.c
+++ b/source/libs/config/src/config.c
@@ -18,7 +18,6 @@
 #include "tep.h"
 #include "tlocale.h"
 #include "tmsg.h"
-#include "ttimezone.h"
 
 #define CFG_NAME_PRINT_LEN 22
 #define CFG_SRC_PRINT_LEN 12