diff --git a/angular/src/app/_components/datetime-picker/datetime-picker.component.ts b/angular/src/app/_components/datetime-picker/datetime-picker.component.ts
index 8e37777..a4b0e1e 100644
--- a/angular/src/app/_components/datetime-picker/datetime-picker.component.ts
+++ b/angular/src/app/_components/datetime-picker/datetime-picker.component.ts
@@ -25,6 +25,7 @@ export class DatetimePickerComponent implements OnInit {
 
     ngOnInit() {
         if (this.initialValue) {
+            // Datum als UTC interpretieren
             const date = new Date(this.initialValue);
             this.form.patchValue({
                 date: this.formatDate(date),
@@ -44,19 +45,20 @@ export class DatetimePickerComponent implements OnInit {
     }
 
     private formatDate(date: Date): string {
-        return date.toLocaleDateString('en-CA');
+        // ISO String verwenden und nur den Datumsteil extrahieren (YYYY-MM-DD)
+        return date.toISOString().split('T')[0];
     }
 
     private formatTime(date: Date): string {
+        // Zeit aus ISO String extrahieren
+        const timeString = date.toISOString().split('T')[1];
+
         if (this.showSeconds) {
-            return date.toLocaleTimeString('en-GB', {hour12: false});
+            // Rückgabe mit Sekunden (HH:MM:SS)
+            return timeString.substring(0, 8);
         } else {
-            // Nur Stunden und Minuten zurückgeben
-            return date.toLocaleTimeString('en-GB', {
-                hour12: false,
-                hour: '2-digit',
-                minute: '2-digit'
-            });
+            // Nur Stunden und Minuten zurückgeben (HH:MM)
+            return timeString.substring(0, 5);
         }
     }
 
@@ -74,21 +76,24 @@ export class DatetimePickerComponent implements OnInit {
                 seconds = '00';
             }
 
+            // Datum in UTC erstellen
             const dateTime = new Date(
-                Number(year),
-                Number(month) - 1,
-                Number(day),
-                Number(hours),
-                Number(minutes),
-                Number(seconds || 0)
+                Date.UTC(
+                    Number(year),
+                    Number(month) - 1,
+                    Number(day),
+                    Number(hours),
+                    Number(minutes),
+                    Number(seconds || 0)
+                )
             );
 
-            // Format the date to match the loaded format
-            const formattedDate = dateTime.toLocaleString('sv-SE', {timeZone: 'Europe/Berlin'}).replace(' ', 'T') + '+02:00';
+            // Als ISO-String formatieren, der automatisch in UTC ist
+            const formattedDate = dateTime.toISOString();
 
             this.dateTimeChange.emit(formattedDate);
         } else {
             this.dateTimeChange.emit(null);
         }
     }
-}
+}
\ No newline at end of file
diff --git a/angular/src/app/_components/list/list.component.ts b/angular/src/app/_components/list/list.component.ts
index f727fae..43cdbcb 100644
--- a/angular/src/app/_components/list/list.component.ts
+++ b/angular/src/app/_components/list/list.component.ts
@@ -405,7 +405,6 @@ export class ListComponent implements OnInit, AfterViewInit, OnDestroy {
     }
 
     public onFilterChanged(filterData: {filters: any, activeCount: number}) {
-        console.log(filterData);
         const filterJson = JSON.stringify(filterData.filters);
         const currentFilterJson = JSON.stringify(this.filterObj);
 
@@ -417,6 +416,12 @@ export class ListComponent implements OnInit, AfterViewInit, OnDestroy {
     }
 
     public onCreateData() {
+        // Important: Reset the data property to prevent using previous edit data
+        if (this.dataFormComponentData) {
+            this.dataFormComponentData = {...this.dataFormComponentData};
+            delete this.dataFormComponentData.data;
+        }
+
         this.appHelperService.openModal(
             this.dataFormComponent,
             this.dataFormComponentData,
@@ -425,7 +430,11 @@ export class ListComponent implements OnInit, AfterViewInit, OnDestroy {
     }
 
     public onEditData(element: any) {
-        this.dataFormComponentData.data = element;
+        // Create a new object instead of modifying the existing one
+        this.dataFormComponentData = {
+            ...this.dataFormComponentData,
+            data: element
+        };
         this.appHelperService.openModal(
             this.dataFormComponent,
             this.dataFormComponentData,
diff --git a/angular/src/app/_views/trip/trip-location-form/trip-location-form.component.html b/angular/src/app/_views/trip/trip-location-form/trip-location-form.component.html
index 02a1bbf..ba6566a 100644
--- a/angular/src/app/_views/trip/trip-location-form/trip-location-form.component.html
+++ b/angular/src/app/_views/trip/trip-location-form/trip-location-form.component.html
@@ -5,7 +5,7 @@
         </div>
     } @else {
         <div class="spt-headline d-flex justify-content-between align-items-start">
-            <h2>{{ ('basic.edit') | translate }} {{ 'model.trip_location' | translate }}: {{ data?.location?.name }}</h2>
+            <h2>{{ ('basic.edit') | translate }} {{ 'model.trip_location' | translate }}</h2>
         </div>
     }
     <div class="spt-form">
diff --git a/angular/src/app/_views/trip/trip-location-form/trip-location-form.component.ts b/angular/src/app/_views/trip/trip-location-form/trip-location-form.component.ts
index 8b3ce07..d0d8c57 100644
--- a/angular/src/app/_views/trip/trip-location-form/trip-location-form.component.ts
+++ b/angular/src/app/_views/trip/trip-location-form/trip-location-form.component.ts
@@ -1,4 +1,4 @@
-import {Component, Input} from '@angular/core';
+import {Component} from '@angular/core';
 import {AbstractDataFormComponent} from "@app/_components/_abstract/abstract-data-form-component";
 import {
     LocationService, TripJsonld,
@@ -21,11 +21,13 @@ import {SearchSelectComponent} from "@app/_components/search-select/search-selec
 })
 export class TripLocationFormComponent extends AbstractDataFormComponent<TripLocationJsonld> {
 
-    protected trip!: TripJsonld;
-    protected arrivalDateTime?: string;
-    protected departureDateTime?: string;
+    protected readonly tripLocationForm = tripLocationForm;
     protected readonly SearchSelectComponent = SearchSelectComponent;
     protected locationColDefinitions: ListColDefinition[];
+    protected trip!: TripJsonld;
+    protected newArrivalDateTime?: string;
+    protected newDepartureDateTime?: string;
+    protected tripLocationEntries: TripLocationJsonld[];
 
     constructor(
         private tripLocationService: TripLocationService,
@@ -49,7 +51,7 @@ export class TripLocationFormComponent extends AbstractDataFormComponent<TripLoc
             translateService,
             router
         );
-
+        this.tripLocationEntries = [];
         this.redirectAfterDelete = '/' + ROUTE_BASE_DATA;
         this.locationColDefinitions = SearchSelectComponent.getDefaultColDefLocations();
     }
@@ -58,8 +60,11 @@ export class TripLocationFormComponent extends AbstractDataFormComponent<TripLoc
         super.ngOnInit();
         this.form.get('tripIri')?.setValue(this.trip.id);
         if (!this.isEditMode()) {
-            this.form.get('arrivalDateTime')?.setValue(this.arrivalDateTime);
-            this.form.get('departureDateTime')?.setValue(this.departureDateTime);
+            this.form.get('newArrivalDateTime')?.setValue(this.newArrivalDateTime);
+            this.form.get('newDepartureDateTime')?.setValue(this.newDepartureDateTime);
+        } else {
+            this.form.get('newArrivalDateTime')?.setValue(this.data?.arrivalDateTime);
+            this.form.get('newDepartureDateTime')?.setValue(this.data?.departureDateTime);
         }
     }
 
@@ -72,8 +77,115 @@ export class TripLocationFormComponent extends AbstractDataFormComponent<TripLoc
     }
 
     override onSubmit() {
+        const formData = this.form.value as TripLocationJsonld;
+
+        if (this.hasDateOverlap(formData)) {
+            this.translateService?.get('trip_location.overlap_error').subscribe((error: string) => {
+                alert(error);
+            });
+            return;
+        }
+
         super.onSubmit();
     }
 
-    protected readonly tripLocationForm = tripLocationForm;
+    private hasDateOverlap(formData: TripLocationJsonld): boolean {
+        // Wenn kein Datum gesetzt ist, kann keine Überlappung stattfinden
+        if (!formData.arrivalDateTime && !formData.departureDateTime) {
+            return false;
+        }
+
+        // Wenn wir im Edit-Modus sind, entferne den aktuellen Eintrag aus der Überprüfung
+        const entriesToCheck = this.isEditMode()
+            ? this.tripLocationEntries.filter(entry => entry.id !== this.data?.id)
+            : this.tripLocationEntries;
+
+        for (const entry of entriesToCheck) {
+            // Fall 1: Nur ein Datum ist gesetzt in formData
+            if (formData.arrivalDateTime && !formData.departureDateTime) {
+                // Arrival date darf nicht mit anderen arrival dates übereinstimmen
+                if (entry.arrivalDateTime === formData.arrivalDateTime) {
+                    return true;
+                }
+
+                // Überprüfe, ob arrival innerhalb eines existierenden Zeitraums liegt
+                // ABER: arrival darf gleich mit einem departure sein
+                if (entry.arrivalDateTime && entry.departureDateTime) {
+                    const arrivalDate = new Date(formData.arrivalDateTime);
+                    const entryArrival = new Date(entry.arrivalDateTime);
+                    const entryDeparture = new Date(entry.departureDateTime);
+
+                    // Liegt innerhalb des Zeitraums, aber ist NICHT gleich dem departure
+                    if (arrivalDate > entryArrival && arrivalDate < entryDeparture) {
+                        return true;
+                    }
+                }
+            }
+            else if (!formData.arrivalDateTime && formData.departureDateTime) {
+                // Departure date darf nicht mit anderen departure dates übereinstimmen
+                if (entry.departureDateTime === formData.departureDateTime) {
+                    return true;
+                }
+
+                // Überprüfe, ob departure innerhalb eines existierenden Zeitraums liegt
+                // ABER: departure darf gleich mit einem arrival sein
+                if (entry.arrivalDateTime && entry.departureDateTime) {
+                    const departureDate = new Date(formData.departureDateTime);
+                    const entryArrival = new Date(entry.arrivalDateTime);
+                    const entryDeparture = new Date(entry.departureDateTime);
+
+                    // Liegt innerhalb des Zeitraums, aber ist NICHT gleich dem arrival
+                    if (departureDate > entryArrival && departureDate < entryDeparture) {
+                        return true;
+                    }
+                }
+            }
+            // Fall 2: Beide Daten sind gesetzt in formData, überprüfe auf Überlappung
+            else if (formData.arrivalDateTime && formData.departureDateTime) {
+                const formArrival = new Date(formData.arrivalDateTime);
+                const formDeparture = new Date(formData.departureDateTime);
+
+                // Wenn der andere Eintrag beide Daten hat
+                if (entry.arrivalDateTime && entry.departureDateTime) {
+                    const entryArrival = new Date(entry.arrivalDateTime);
+                    const entryDeparture = new Date(entry.departureDateTime);
+
+                    // Überprüfung auf Überlappung der Zeiträume, erlaubt grenzen zu teilen
+                    // Formular-Zeitraum darf vor oder nach dem Entry-Zeitraum liegen,
+                    // oder die Grenzen dürfen gleich sein (departure gleich arrival oder umgekehrt)
+                    if (
+                        // Überlappung, aber nicht nur am Rand
+                        (formArrival < entryDeparture && formDeparture > entryArrival) &&
+                        // Erlaubt: formDeparture === entryArrival ODER formArrival === entryDeparture
+                        !(formDeparture.getTime() === entryArrival.getTime() ||
+                            formArrival.getTime() === entryDeparture.getTime())
+                    ) {
+                        return true;
+                    }
+                }
+                // Wenn der andere Eintrag nur arrival hat
+                else if (entry.arrivalDateTime && !entry.departureDateTime) {
+                    const entryArrival = new Date(entry.arrivalDateTime);
+
+                    // Das arrival des anderen Eintrags darf nicht innerhalb des neuen Zeitraums liegen
+                    // ABER: Es darf am Rand liegen (gleich mit formDeparture)
+                    if (entryArrival > formArrival && entryArrival < formDeparture) {
+                        return true;
+                    }
+                }
+                // Wenn der andere Eintrag nur departure hat
+                else if (!entry.arrivalDateTime && entry.departureDateTime) {
+                    const entryDeparture = new Date(entry.departureDateTime);
+
+                    // Das departure des anderen Eintrags darf nicht innerhalb des neuen Zeitraums liegen
+                    // ABER: Es darf am Rand liegen (gleich mit formArrival)
+                    if (entryDeparture > formArrival && entryDeparture < formDeparture) {
+                        return true;
+                    }
+                }
+            }
+        }
+
+        return false;
+    }
 }
diff --git a/angular/src/app/_views/trip/trip-location-list/trip-location-list.component.ts b/angular/src/app/_views/trip/trip-location-list/trip-location-list.component.ts
index a32fe86..3531e82 100644
--- a/angular/src/app/_views/trip/trip-location-list/trip-location-list.component.ts
+++ b/angular/src/app/_views/trip/trip-location-list/trip-location-list.component.ts
@@ -100,7 +100,6 @@ export class TripLocationListComponent {
             map(response => {
                 // Set default arrival and departure time before return
                 let arrivalDateTime = this.appHelperService.getDateTimeWithoutTimezone();
-                console.log(arrivalDateTime);
                 let departureDateTime = this.appHelperService.getDateTimeWithoutTimezone(new Date(new Date().setHours(new Date().getHours() + 1)));
                 if (response.member && response.member.length > 0) {
                     const lastEntry = response.member[response.member.length - 1];
@@ -116,8 +115,9 @@ export class TripLocationListComponent {
                 }
                 this.dataFormComponentData = {
                     trip: this.trip,
-                    arrivalDateTime: arrivalDateTime,
-                    departureDateTime: departureDateTime
+                    newArrivalDateTime: arrivalDateTime,
+                    newDepartureDateTime: departureDateTime,
+                    tripLocationEntries: response.member
                 };
 
                 return response;
diff --git a/angular/src/assets/i18n/en.json b/angular/src/assets/i18n/en.json
index 78d932e..b8516da 100644
--- a/angular/src/assets/i18n/en.json
+++ b/angular/src/assets/i18n/en.json
@@ -44,7 +44,7 @@
   },
   "common": {
     "code": "Code",
-    "created_at": "Created at",
+    "created_at": "Created at (UTC)",
     "date": "Date",
     "name": "Name",
     "note": "Note",
@@ -107,7 +107,8 @@
   },
   "trip_location": {
     "arrival_date_time": "ETA",
-    "departure_date_time": "ETD"
+    "departure_date_time": "ETD",
+    "overlap_error": "These dates and times overlap with other entries, please check!!"
   },
   "user_trip": {
     "approved": "Approved",