backend/src/main/java/core/api/models/timemanager/tasks/TaskFieldInfo.java

@@ -1,5 +1,6 @@
 package core.api.models.timemanager.tasks;
 
+import com.fasterxml.jackson.annotation.JsonFormat;
 import org.hibernate.validator.constraints.Length;
 
 import javax.validation.constraints.NotBlank;
@@ -11,7 +12,11 @@ public class TaskFieldInfo {
     @Length(max = 255)
     private String taskName;
     private int eta;
+
+    @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX")
     private LocalDate startDate;
+
+    @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX")
     private LocalDate deadline;
 
     public TaskFieldInfo() {

frontend/src/app/tasks/task-editor/task-editor.component.ts

@@ -7,6 +7,7 @@ import {MAT_DIALOG_DATA, MatDialogRef} from "@angular/material/dialog";
 import {TaskService} from "../../../api";
 import {TaskEditorData} from "./TaskEditorData";
 import {MatSnackBar} from "@angular/material/snack-bar";
+import * as moment from "moment/moment";
 
 
 @Component({
@@ -53,8 +54,8 @@ export class TaskEditorComponent implements OnInit {
     this.taskService.tasksTaskgroupIDPut(this.editorData.taskgroupID, {
       taskName: this.nameCtrl.value,
       eta: this.etaCtrl.value,
-      startDate: this.startDate.value,
-      deadline: this.endDate.value
+      startDate: moment(this.startDate.value).format('YYYY-MM-DDTHH:mm:ss.SSSZ'),
+      deadline: moment(this.endDate.value).format('YYYY-MM-DDTHH:mm:ss.SSSZ')
     }).subscribe({
       next: resp => {
         this.dialog.close(resp);