diff --git a/contrib/dolphin/expected/unix_timestamp_timezone.out b/contrib/dolphin/expected/unix_timestamp_timezone.out
new file mode 100644
index 0000000000000000000000000000000000000000..8263ec459224173111e67567ce646a43f9bf447a
--- /dev/null
+++ b/contrib/dolphin/expected/unix_timestamp_timezone.out
@@ -0,0 +1,249 @@
+create schema unix_timestamp_timezone;
+set current_schema = unix_timestamp_timezone;
+set timezone='PRC';
+select unix_timestamp('1970-01-01+00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01+08');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00+00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00+00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00+08:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00+08:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+set timezone='+00';
+select unix_timestamp('1970-01-01+00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01+08');
+ unix_timestamp 
+----------------
+          28800
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00');
+ unix_timestamp 
+----------------
+          28800
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00+00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00+00:00');
+ unix_timestamp 
+----------------
+          28800
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00+08:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00+08:00');
+ unix_timestamp 
+----------------
+          28800
+(1 row)
+
+set timezone='+04';
+select unix_timestamp('1970-01-01+00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01+08');
+ unix_timestamp 
+----------------
+          14400
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00');
+ unix_timestamp 
+----------------
+          14400
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00+00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00+00:00');
+ unix_timestamp 
+----------------
+          14400
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00+08:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00+08:00');
+ unix_timestamp 
+----------------
+          14400
+(1 row)
+
+set timezone='+08';
+select unix_timestamp('1970-01-01+00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01+08');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00+00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00+00:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00+08:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00+08:00');
+ unix_timestamp 
+----------------
+              0
+(1 row)
+
+set timezone='-08';
+select unix_timestamp('1970-01-01+00');
+ unix_timestamp 
+----------------
+          28800
+(1 row)
+
+select unix_timestamp('1970-01-01+08');
+ unix_timestamp 
+----------------
+          57600
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00');
+ unix_timestamp 
+----------------
+          28800
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00');
+ unix_timestamp 
+----------------
+          57600
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00+00:00');
+ unix_timestamp 
+----------------
+          28800
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00+00:00');
+ unix_timestamp 
+----------------
+          57600
+(1 row)
+
+select unix_timestamp('1970-01-01 00:00:00+08:00');
+ unix_timestamp 
+----------------
+          28800
+(1 row)
+
+select unix_timestamp('1970-01-01 08:00:00+08:00');
+ unix_timestamp 
+----------------
+          57600
+(1 row)
+
+reset current_schema;
+drop schema unix_timestamp_timezone cascade;
diff --git a/contrib/dolphin/parallel_schedule_dolphin b/contrib/dolphin/parallel_schedule_dolphin
index 9b644f9e5cef235aed3b7bc088a753b52979585c..d93be5544e1368535db8a353075f9ba5e07baf24 100644
--- a/contrib/dolphin/parallel_schedule_dolphin
+++ b/contrib/dolphin/parallel_schedule_dolphin
@@ -119,7 +119,7 @@ test: case_sensitive_test_backquote/role_test
 
 test: test_mysql_prepare db_b_rename_user_test export_set if_not_exists_test test_create_index_if_not_exists
 
-test: test_mysql_operator test_op_xor_unsignedint test_op_blob test_op_xor_boolandfloat test_mysql_char test_op_xor_dateandtime
+test: test_mysql_operator test_op_xor_unsignedint test_op_blob test_op_xor_boolandfloat test_mysql_char test_op_xor_dateandtime unix_timestamp_timezone
 
 test: json_array json_object json_quote json_contains json_contains_path json_extract json_unquote  json_keys json_search json_array_append
 
diff --git a/contrib/dolphin/plugin_utils/adt/timestamp.cpp b/contrib/dolphin/plugin_utils/adt/timestamp.cpp
index eb8ec1dab0d72436ffd724690eb440e20d9760ad..9646d1bdbc5878eced4f00fde4ddae186d77dc7c 100644
--- a/contrib/dolphin/plugin_utils/adt/timestamp.cpp
+++ b/contrib/dolphin/plugin_utils/adt/timestamp.cpp
@@ -2535,7 +2535,11 @@ recalc_t:
     if (attimezone == NULL && u_sess->time_cxt.HasCTZSet) {
         *tzp = u_sess->time_cxt.CTimeZone;
         tm->tm_isdst = 0;
+#ifdef DOLPHIN
+        tm->tm_gmtoff = -u_sess->time_cxt.CTimeZone;
+#else
         tm->tm_gmtoff = u_sess->time_cxt.CTimeZone;
+#endif
         tm->tm_zone = NULL;
         if (tzn != NULL)
             *tzn = NULL;
diff --git a/contrib/dolphin/sql/unix_timestamp_timezone.sql b/contrib/dolphin/sql/unix_timestamp_timezone.sql
new file mode 100644
index 0000000000000000000000000000000000000000..4c550aa128e2a0b30ebb5182ced120783549a0f9
--- /dev/null
+++ b/contrib/dolphin/sql/unix_timestamp_timezone.sql
@@ -0,0 +1,53 @@
+create schema unix_timestamp_timezone;
+set current_schema = unix_timestamp_timezone;
+set timezone='PRC';
+select unix_timestamp('1970-01-01+00');
+select unix_timestamp('1970-01-01+08');
+select unix_timestamp('1970-01-01 00:00:00');
+select unix_timestamp('1970-01-01 08:00:00');
+select unix_timestamp('1970-01-01 00:00:00+00:00');
+select unix_timestamp('1970-01-01 08:00:00+00:00');
+select unix_timestamp('1970-01-01 00:00:00+08:00');
+select unix_timestamp('1970-01-01 08:00:00+08:00');
+
+set timezone='+00';
+select unix_timestamp('1970-01-01+00');
+select unix_timestamp('1970-01-01+08');
+select unix_timestamp('1970-01-01 00:00:00');
+select unix_timestamp('1970-01-01 08:00:00');
+select unix_timestamp('1970-01-01 00:00:00+00:00');
+select unix_timestamp('1970-01-01 08:00:00+00:00');
+select unix_timestamp('1970-01-01 00:00:00+08:00');
+select unix_timestamp('1970-01-01 08:00:00+08:00');
+
+set timezone='+04';
+select unix_timestamp('1970-01-01+00');
+select unix_timestamp('1970-01-01+08');
+select unix_timestamp('1970-01-01 00:00:00');
+select unix_timestamp('1970-01-01 08:00:00');
+select unix_timestamp('1970-01-01 00:00:00+00:00');
+select unix_timestamp('1970-01-01 08:00:00+00:00');
+select unix_timestamp('1970-01-01 00:00:00+08:00');
+select unix_timestamp('1970-01-01 08:00:00+08:00');
+
+set timezone='+08';
+select unix_timestamp('1970-01-01+00');
+select unix_timestamp('1970-01-01+08');
+select unix_timestamp('1970-01-01 00:00:00');
+select unix_timestamp('1970-01-01 08:00:00');
+select unix_timestamp('1970-01-01 00:00:00+00:00');
+select unix_timestamp('1970-01-01 08:00:00+00:00');
+select unix_timestamp('1970-01-01 00:00:00+08:00');
+select unix_timestamp('1970-01-01 08:00:00+08:00');
+
+set timezone='-08';
+select unix_timestamp('1970-01-01+00');
+select unix_timestamp('1970-01-01+08');
+select unix_timestamp('1970-01-01 00:00:00');
+select unix_timestamp('1970-01-01 08:00:00');
+select unix_timestamp('1970-01-01 00:00:00+00:00');
+select unix_timestamp('1970-01-01 08:00:00+00:00');
+select unix_timestamp('1970-01-01 00:00:00+08:00');
+select unix_timestamp('1970-01-01 08:00:00+08:00');
+reset current_schema;
+drop schema unix_timestamp_timezone cascade;