diff --git a/client/mysql.cc b/client/mysql.cc
index 3158d270ae7d5..e242193ea4c5c 100644
--- a/client/mysql.cc
+++ b/client/mysql.cc
@@ -270,8 +270,7 @@ static int sigint_received= 0;
 #endif
 static char *current_host,*current_db,*current_user=0,*opt_password=0,
             *current_prompt=0, *delimiter_str= 0,
-            *default_charset= (char*) MYSQL_AUTODETECT_CHARSET_NAME,
-            *opt_init_command= 0;
+            *default_charset= (char*) MYSQL_AUTODETECT_CHARSET_NAME;
 static char *histfile;
 static char *histfile_tmp;
 static String glob_buffer,old_buffer;
@@ -308,6 +307,7 @@ static uint opt_protocol=0;
 static const char *opt_protocol_type= "";
 
 #include "sslopt-vars.h"
+#include "common-cli-vars.h"
 
 const char *default_dbug_option="d:t:o,/tmp/mariadb.trace";
 
@@ -1833,10 +1833,6 @@ static struct my_option my_long_options[] =
    0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
   {"ignore-spaces", 'i', "Ignore space after function names.",
    &ignore_spaces, &ignore_spaces, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
-  {"init-command", 0,
-   "SQL Command to execute when connecting to MariaDB server. Will "
-   "automatically be re-executed when reconnecting.", &opt_init_command,
-   &opt_init_command, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"line-numbers", 0, "Write line numbers for errors.",
    &line_numbers, &line_numbers, 0, GET_BOOL, NO_ARG, 1, 0, 0, 0, 0, 0},
   {"skip-line-numbers", 'L', "Don't write line number for errors.", 0, 0, 0,
@@ -1948,6 +1944,7 @@ static struct my_option my_long_options[] =
    &opt_mysql_unix_port, &opt_mysql_unix_port, 0, GET_STR_ALLOC,
    REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #include "sslopt-longopts.h"
+#include "common-cli-longopts.h"
   {"table", 't', "Output in table format.", &output_tables,
    &output_tables, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
   {"tee", OPT_TEE,
diff --git a/client/mysqldump.cc b/client/mysqldump.cc
index d86eda1a43e66..94923468a6e70 100644
--- a/client/mysqldump.cc
+++ b/client/mysqldump.cc
@@ -188,6 +188,7 @@ static MYSQL_RES *routine_res, *routine_list_res, *slave_status_res= NULL;
 
 
 #include <sslopt-vars.h>
+#include <common-cli-vars.h>
 FILE *md_result_file= 0;
 FILE *stderror_file=0;
 
@@ -592,6 +593,7 @@ static struct my_option my_long_options[] =
    &opt_mysql_unix_port, &opt_mysql_unix_port, 0, 
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #include <sslopt-longopts.h>
+#include <common-cli-longopts.h>
   {"system", 0, "Dump system tables as portable SQL",
    &opt_system, &opt_system, &opt_system_types, GET_SET, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"tab",'T',
@@ -2106,6 +2108,9 @@ static MYSQL* connect_to_db(char *host, char *user,char *passwd)
   if (opt_default_auth && *opt_default_auth)
     mysql_options(con, MYSQL_DEFAULT_AUTH, opt_default_auth);
 
+  if (opt_init_command && *opt_init_command)
+    mysql_options(con, MYSQL_INIT_COMMAND, opt_init_command);
+
   mysql_options(con, MYSQL_OPT_CONNECT_ATTR_RESET, 0);
   mysql_options4(con, MYSQL_OPT_CONNECT_ATTR_ADD,
                  "program_name", "mysqldump");
diff --git a/client/mysqlslap.c b/client/mysqlslap.c
index a90c059c65a01..e69641560673e 100644
--- a/client/mysqlslap.c
+++ b/client/mysqlslap.c
@@ -86,6 +86,7 @@
 #include <my_dir.h>
 #include <signal.h>
 #include <sslopt-vars.h>
+#include <common-cli-vars.h>
 #ifndef _WIN32
 #include <sys/wait.h>
 #endif
@@ -118,8 +119,7 @@ static char *host= NULL, *opt_password= NULL, *user= NULL,
             *default_engine= NULL,
             *pre_system= NULL,
             *post_system= NULL,
-            *opt_mysql_unix_port= NULL,
-            *opt_init_command= NULL;
+            *opt_mysql_unix_port= NULL;
 static char *opt_plugin_dir= 0, *opt_default_auth= 0;
 
 const char *delimiter= "\n";
@@ -617,11 +617,6 @@ static struct my_option my_long_options[] =
   {"host", 'h', "Connect to host. Defaults in the following order: "
   "$MARIADB_HOST, and then localhost",
    &host, &host, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
-  {"init-command", 0,
-   "SQL Command to execute when connecting to MariaDB server. Will "
-   "automatically be re-executed when reconnecting.",
-   &opt_init_command, &opt_init_command, 0,
-   GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"iterations", 'i', "Number of times to run the tests.", &iterations,
     &iterations, 0, GET_UINT, REQUIRED_ARG, 1, 0, 0, 0, 0, 0},
   {"no-drop", 0, "Do not drop the schema after the test.",
@@ -685,6 +680,7 @@ static struct my_option my_long_options[] =
     &opt_mysql_unix_port, &opt_mysql_unix_port, 0, GET_STR,
     REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #include <sslopt-longopts.h>
+#include <common-cli-longopts.h>
 #ifndef DONT_ALLOW_USER_CHANGE
   {"user", 'u', "User for login if not current user.", &user,
     &user, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
diff --git a/include/common-cli-longopts.h b/include/common-cli-longopts.h
new file mode 100644
index 0000000000000..fc572f758173b
--- /dev/null
+++ b/include/common-cli-longopts.h
@@ -0,0 +1,10 @@
+#ifndef COMMON_CLI_LONGOPTS_INCLUDED
+#define COMMON_CLI_LONGOPTS_INCLUDED
+
+  {"init-command", 0,
+   "SQL Command to execute when connecting to MariaDB server. Will "
+   "automatically be re-executed when reconnecting.",
+   &opt_init_command, &opt_init_command, 0,
+   GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
+
+#endif /* COMMON_CLI_LONGOPTS_INCLUDED */
diff --git a/include/common-cli-vars.h b/include/common-cli-vars.h
new file mode 100644
index 0000000000000..2d726394b1a51
--- /dev/null
+++ b/include/common-cli-vars.h
@@ -0,0 +1,6 @@
+#ifndef COMMON_CLI_VARS_INCLUDED
+#define COMMON_CLI_VARS_INCLUDED
+
+static char *opt_init_command= 0;
+
+#endif /* COMMON_CLI_VARS_INCLUDED */
diff --git a/mysql-test/main/mysqldump-init-command.result b/mysql-test/main/mysqldump-init-command.result
new file mode 100644
index 0000000000000..2c91a417f5ecd
--- /dev/null
+++ b/mysql-test/main/mysqldump-init-command.result
@@ -0,0 +1,23 @@
+CREATE DATABASE 28911_mysqldump;
+USE 28911_mysqldump;
+CREATE TABLE t1(id INT, ts TIMESTAMP);
+SET time_zone='+00:00';
+INSERT INTO t1 VALUES (1, '2026-01-01 12:00:00');
+
+# dump with --init-command="SET SESSION time_zone='+05:00'" (INSERT shows 17:00:00)
+/*M!999999\- enable the sandbox mode */ 
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!40101 SET character_set_client = utf8mb4 */;
+CREATE TABLE `t1` (
+  `id` int(11) DEFAULT NULL,
+  `ts` timestamp NULL DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci;
+/*!40101 SET character_set_client = @saved_cs_client */;
+SET @OLD_AUTOCOMMIT=@@AUTOCOMMIT, @@AUTOCOMMIT=0;
+INSERT INTO `t1` VALUES
+(1,'2026-01-01 17:00:00');
+COMMIT;
+SET AUTOCOMMIT=@OLD_AUTOCOMMIT;
+DROP TABLE t1;
+DROP DATABASE 28911_mysqldump;
+# End of MDEV-28911
diff --git a/mysql-test/main/mysqldump-init-command.test b/mysql-test/main/mysqldump-init-command.test
new file mode 100644
index 0000000000000..4e2554d2a262b
--- /dev/null
+++ b/mysql-test/main/mysqldump-init-command.test
@@ -0,0 +1,18 @@
+--source include/not_embedded.inc
+
+# MDEV-28911: Add --init-command option to mariadb-dump / mysqldump
+
+CREATE DATABASE 28911_mysqldump;
+USE 28911_mysqldump;
+CREATE TABLE t1(id INT, ts TIMESTAMP);
+SET time_zone='+00:00';
+INSERT INTO t1 VALUES (1, '2026-01-01 12:00:00');
+
+--echo 
+--echo # dump with --init-command="SET SESSION time_zone='+05:00'" (INSERT shows 17:00:00)
+--exec $MYSQL_DUMP --compact --skip-comments --skip-tz-utc --init-command="SET SESSION time_zone='+05:00'" 28911_mysqldump
+
+DROP TABLE t1;
+DROP DATABASE 28911_mysqldump;
+
+--echo # End of MDEV-28911