diff --git a/src/amf/gmm-build.c b/src/amf/gmm-build.c
index 2a6ec9ab5..8b1cc4825 100644
--- a/src/amf/gmm-build.c
+++ b/src/amf/gmm-build.c
@@ -596,6 +596,9 @@ ogs_pkbuf_t *gmm_build_configuration_update_command(
             configuration_update_command->presencemask |=
                 OGS_NAS_5GS_CONFIGURATION_UPDATE_COMMAND_NETWORK_DAYLIGHT_SAVING_TIME_PRESENT;
             network_daylight_saving_time->length = 1;
+            if (local.tm_isdst > 0) {
+                network_daylight_saving_time->value = 1;
+            }
         }
     }
 
diff --git a/src/mme/emm-handler.c b/src/mme/emm-handler.c
index 4ab377bba..6dd4a9ea9 100644
--- a/src/mme/emm-handler.c
+++ b/src/mme/emm-handler.c
@@ -347,6 +347,9 @@ int emm_handle_attach_complete(
         emm_information->presencemask |=
             OGS_NAS_EPS_EMM_INFORMATION_NETWORK_DAYLIGHT_SAVING_TIME_PRESENT;
         network_daylight_saving_time->length = 1;
+        if (local.tm_isdst > 0) {
+            network_daylight_saving_time->value = 1;
+        }
     }
 
     emmbuf = nas_eps_security_encode(mme_ue, &message);