diff --git a/application/controllers/api/frontend/v1/stv/Kontakt.php b/application/controllers/api/frontend/v1/stv/Kontakt.php
index 0c2a0af5c..282c70fd3 100644
--- a/application/controllers/api/frontend/v1/stv/Kontakt.php
+++ b/application/controllers/api/frontend/v1/stv/Kontakt.php
@@ -133,11 +133,11 @@ class Kontakt extends FHCAPI_Controller
 	public function getAdressen($person_id)
 	{
 		$this->AdresseModel->addSelect("public.tbl_adresse.*,
-					TO_CHAR (CASE
-					WHEN public.tbl_adresse.updateamum >= public.tbl_adresse.insertamum
-					THEN public.tbl_adresse.updateamum
-					ELSE public.tbl_adresse.insertamum
-				END::timestamp, 'DD.MM.YYYY HH24:MI:SS') AS lastUpdate");
+			(CASE
+				WHEN public.tbl_adresse.updateamum >= public.tbl_adresse.insertamum
+				THEN public.tbl_adresse.updateamum
+				ELSE public.tbl_adresse.insertamum
+			END) AS lastUpdate");
 		$this->AdresseModel->addSelect('t.*');
 		$this->AdresseModel->addSelect('f.firma_id');
 		$this->AdresseModel->addSelect('f.name as firmenname');
@@ -409,11 +409,11 @@ class Kontakt extends FHCAPI_Controller
 	public function getKontakte($person_id)
 	{
 		$this->KontaktModel->addSelect("public.tbl_kontakt.*,
-			TO_CHAR (CASE 
-					WHEN public.tbl_kontakt.updateamum >= public.tbl_kontakt.insertamum 
-					THEN public.tbl_kontakt.updateamum 
-					ELSE public.tbl_kontakt.insertamum 
-				END::timestamp, 'DD.MM.YYYY HH24:MI:SS') AS lastUpdate, st.bezeichnung, f.name");
+			(CASE
+				WHEN public.tbl_kontakt.updateamum >= public.tbl_kontakt.insertamum
+				THEN public.tbl_kontakt.updateamum
+				ELSE public.tbl_kontakt.insertamum
+			END) AS lastUpdate, st.bezeichnung, f.name");
 		$this->StandortModel->addJoin('public.tbl_standort st', 'ON (public.tbl_kontakt.standort_id = st.standort_id)', 'LEFT');
 		$this->FirmaModel->addJoin('public.tbl_firma f', 'ON (f.firma_id = st.firma_id)', 'LEFT');
 		$result = $this->KontaktModel->loadWhere(
diff --git a/public/js/components/Stv/Studentenverwaltung/Details/Kontakt/Address.js b/public/js/components/Stv/Studentenverwaltung/Details/Kontakt/Address.js
index d24401014..3aca019d4 100644
--- a/public/js/components/Stv/Studentenverwaltung/Details/Kontakt/Address.js
+++ b/public/js/components/Stv/Studentenverwaltung/Details/Kontakt/Address.js
@@ -62,7 +62,26 @@ export default{
 					{title:"Adresse_id", field:"adresse_id", visible:false},
 					{title:"Person_id", field:"person_id", visible:false},
 					{title:"Name", field:"name", visible:false},
-					{title:"letzte Änderung", field:"lastupdate", visible:false},
+					{
+						title:"letzte Änderung",
+						field:"lastupdate",
+						visible: false,
+						formatter: function (cell) {
+							const dateStr = cell.getValue();
+							if (!dateStr) return "";
+
+							const date = new Date(dateStr);
+							return date.toLocaleString("de-DE", {
+								day: "2-digit",
+								month: "2-digit",
+								year: "numeric",
+								hour: "2-digit",
+								minute: "2-digit",
+								second: "2-digit",
+								hour12: false
+							});
+						}
+					},
 					{title:"Rechnungsadresse", field:"rechnungsadresse", visible:false,
 						formatter: (cell, formatterParams, onRendered) => {
 							let output = cell.getValue() ? this.$p.t('ui','ja') : this.$p.t('ui','nein');
diff --git a/public/js/components/Stv/Studentenverwaltung/Details/Kontakt/Contact.js b/public/js/components/Stv/Studentenverwaltung/Details/Kontakt/Contact.js
index 912af1ceb..87dc70eb1 100644
--- a/public/js/components/Stv/Studentenverwaltung/Details/Kontakt/Contact.js
+++ b/public/js/components/Stv/Studentenverwaltung/Details/Kontakt/Contact.js
@@ -46,7 +46,26 @@ export default{
 					{title:"Person_id", field:"person_id", visible:false},
 					{title:"Kontakt_id", field:"kontakt_id", visible:false},
 					{title:"Standort_id", field:"standort_id", visible:false},
-					{title:"letzte Änderung", field:"lastupdate", visible:false},
+					{
+						title:"letzte Änderung",
+						field:"lastupdate",
+						visible: false,
+						formatter: function (cell) {
+							const dateStr = cell.getValue();
+							if (!dateStr) return "";
+
+							const date = new Date(dateStr);
+							return date.toLocaleString("de-DE", {
+								day: "2-digit",
+								month: "2-digit",
+								year: "numeric",
+								hour: "2-digit",
+								minute: "2-digit",
+								second: "2-digit",
+								hour12: false
+							});
+						}
+					},
 					{title: 'Aktionen', field: 'actions',
 						minWidth: 150, // Ensures Action-buttons will be always fully displayed
 						formatter: (cell, formatterParams, onRendered) => {