diff --git a/alfa-client/libs/tech-shared/src/lib/date.util.spec.ts b/alfa-client/libs/tech-shared/src/lib/date.util.spec.ts
index 6a30b34fafdeb786e45347c1da6be75b25674e4c..fc5bc2c029bbaa651be5cbf7eac39bf2700a7a94 100644
--- a/alfa-client/libs/tech-shared/src/lib/date.util.spec.ts
+++ b/alfa-client/libs/tech-shared/src/lib/date.util.spec.ts
@@ -24,6 +24,7 @@
 import { formatDate, registerLocaleData } from '@angular/common';
 import localeDe from '@angular/common/locales/de';
 import {
+  fixPartialYear,
   formatDateWithoutYearWithTime,
   formatForDatabase,
   formatFullDate,
@@ -207,4 +208,23 @@ describe('Date Util', () => {
       dateStrField: string;
     }
   });
+
+  describe('fixPartialYear', () => {
+    it('should return Date in the 2000 millennium for 2 digit year value', () => {
+      const dateInput: Date = new Date('0023-10-22');
+      const yearExpected: number = 2023;
+
+      const result: Date = fixPartialYear(dateInput);
+
+      expect(result.getFullYear()).toBe(yearExpected);
+    });
+
+    it('should return Date unchanged for non 2 digit year value', () => {
+      const dateInput: Date = new Date('2023-10-22');
+
+      const result: Date = fixPartialYear(dateInput);
+
+      expect(result).toBe(dateInput);
+    });
+  });
 });
diff --git a/alfa-client/libs/tech-shared/src/lib/date.util.ts b/alfa-client/libs/tech-shared/src/lib/date.util.ts
index 0d1cbfed27ae543a464047f2f7964b8638aeefb0..da5fe02a94d107c9c74e3b2b578da130aaf89fd9 100644
--- a/alfa-client/libs/tech-shared/src/lib/date.util.ts
+++ b/alfa-client/libs/tech-shared/src/lib/date.util.ts
@@ -101,3 +101,12 @@ export function sortByGermanDateStr<T>(entries: T[], getCompareField: (entry: T)
 function convertGermanDateString(dateStr: string): Date {
   return new Date(dateStr.replace(/(.*)\.(.*)\.(.*)/, '$3-$2-$1'));
 }
+
+export function fixPartialYear(date: Date) {
+  const year: number = date.getFullYear();
+  if (year.toString().length !== 2) {
+    return date;
+  }
+
+  return dateFns.addYears(date, 2000);
+}
diff --git a/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.html b/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.html
index 4d9a6cd7f6c56983ce65590fcae495e88c34e42d..386a0b17284bb98e7120cada4ef904f37d2e56d5 100644
--- a/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.html
+++ b/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.html
@@ -32,6 +32,7 @@
     (blur)="touch()"
     [attr.data-test-id]="(label | convertForDataTest) + '-date-input'"
     (dateInput)="inputEvent($event)"
+    (blur)="onBlur()"
   />
   <mat-datepicker-toggle matSuffix [for]="picker">
     <mat-icon matDatepickerToggleIcon attr.aria-label="xxx">update</mat-icon>
diff --git a/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.spec.ts b/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.spec.ts
index 0bfe30ef97c28aa38ac80510a09def0f312841c6..af091ae59f8bb7dd15807ee95bc512cdd02379ce 100644
--- a/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.spec.ts
+++ b/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.spec.ts
@@ -21,19 +21,22 @@
  * Die sprachspezifischen Genehmigungen und Beschränkungen
  * unter der Lizenz sind dem Lizenztext zu entnehmen.
  */
+import { ConvertForDataTestPipe } from '@alfa-client/tech-shared';
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 import { ReactiveFormsModule } from '@angular/forms';
 import { MatNativeDateModule } from '@angular/material/core';
 import { MatDatepickerModule } from '@angular/material/datepicker';
-import { MatIconModule } from '@angular/material/icon';
 import { MatFormFieldModule } from '@angular/material/form-field';
+import { MatIconModule } from '@angular/material/icon';
 import { MatInputModule } from '@angular/material/input';
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
-import { ConvertForDataTestPipe } from '@alfa-client/tech-shared';
+import faker from '@faker-js/faker';
 import { MockComponent } from 'ng-mocks';
 import { ValidationErrorComponent } from '../../validation-error/validation-error.component';
 import { DateEditorComponent } from './date-editor.component';
 
+import * as dateUtil from '../../../../../../tech-shared/src/lib/date.util';
+
 describe('DateEditorComponent', () => {
   let component: DateEditorComponent;
   let fixture: ComponentFixture<DateEditorComponent>;
@@ -79,4 +82,48 @@ describe('DateEditorComponent', () => {
       expect(element).toBeInstanceOf(HTMLElement);
     });
   });
+
+  describe('onBlur', () => {
+    it('should not call fixPartialYear if input value is not Date object', () => {
+      const inputValue: string = '12.12.2024';
+      component.fieldControl.setValue(inputValue);
+      const fixPartialYear = jest.spyOn(dateUtil, 'fixPartialYear');
+
+      component.onBlur();
+
+      expect(fixPartialYear).not.toHaveBeenCalled();
+    });
+
+    describe('if input value is Date object', () => {
+      const inputValue: Date = faker.date.recent();
+
+      beforeEach(() => {
+        component.fieldControl.setValue(inputValue);
+      });
+
+      it('should call fixPartialYear', () => {
+        const fixPartialYear = jest.spyOn(dateUtil, 'fixPartialYear');
+
+        component.onBlur();
+
+        expect(fixPartialYear).toHaveBeenCalledWith(inputValue);
+      });
+
+      it('should call fieldControl.patchValue', () => {
+        const patchValue = jest.spyOn(component.fieldControl, 'patchValue');
+
+        component.onBlur();
+
+        expect(patchValue).toHaveBeenCalled();
+      });
+
+      it('should call onChange', () => {
+        const onChange = jest.spyOn(component, 'onChange');
+
+        component.onBlur();
+
+        expect(onChange).toHaveBeenCalled();
+      });
+    });
+  });
 });
diff --git a/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.ts b/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.ts
index d3288eabcb3db70e110084e9a8ed3e26f47dde5d..a2f0076e75436e58d9538642cc00c6fe9bb6b7b9 100644
--- a/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.ts
+++ b/alfa-client/libs/ui/src/lib/ui/editor/date-editor/date-editor.component.ts
@@ -21,8 +21,10 @@
  * Die sprachspezifischen Genehmigungen und Beschränkungen
  * unter der Lizenz sind dem Lizenztext zu entnehmen.
  */
+import { fixPartialYear } from '@alfa-client/tech-shared';
 import { Component, Input } from '@angular/core';
 import { MatDatepickerInputEvent } from '@angular/material/datepicker';
+import { isDate } from 'date-fns';
 import { FormControlEditorAbstractComponent } from '../formcontrol-editor.abstract.component';
 
 @Component({
@@ -36,4 +38,15 @@ export class DateEditorComponent extends FormControlEditorAbstractComponent {
   inputEvent(event: MatDatepickerInputEvent<Date>): void {
     this.onChange(event.value);
   }
+
+  onBlur(): void {
+    if (!isDate(this.fieldControl.value)) {
+      return;
+    }
+
+    const value: Date = fixPartialYear(this.fieldControl.value);
+
+    this.fieldControl.patchValue(value);
+    this.onChange(value);
+  }
 }