diff --git a/BetterIServ.Backend/Controllers/UnitsController.cs b/BetterIServ.Backend/Controllers/UnitsController.cs
index 48619aa..f4c84a0 100644
--- a/BetterIServ.Backend/Controllers/UnitsController.cs
+++ b/BetterIServ.Backend/Controllers/UnitsController.cs
@@ -68,7 +68,7 @@ public class UnitsController : ControllerBase {
                 substitution.Classes = result;
             }
             else {
-                substitution.Classes = new[] { classes };
+                substitution.Classes = (classes?.Length == 3 ? new[] { "Q1", "Q2" } : new[] { classes })!;
             }
 
             data.Substitutions.Add(substitution);
diff --git a/BetterIServ.Mobile/src/app/pages/home/home.page.ts b/BetterIServ.Mobile/src/app/pages/home/home.page.ts
index cc6708c..7a645aa 100644
--- a/BetterIServ.Mobile/src/app/pages/home/home.page.ts
+++ b/BetterIServ.Mobile/src/app/pages/home/home.page.ts
@@ -53,7 +53,7 @@ export class HomePage implements OnInit {
       this.lessons = timetable[scheduleDay].filter(lesson => lesson != undefined);
     }
 
-    if (this.dateIsPast(unitsData.date, new Date())) {
+    if (this.dateIsPast(unitsData.date, this.today)) {
       unitsData = await this.units.getSubstitutionPlan("tomorrow");
     }
     this.subs = unitsData.substitutions?.filter(subs => subs.classes.includes(this.classData.class));
@@ -65,7 +65,7 @@ export class HomePage implements OnInit {
   }
 
   private dateIsPast(first: Date, second: Date): boolean {
-    return first.setHours(0, 0, 0, 0) <= second.setHours(0, 0, 0, 0);
+    return first.setHours(0, 0, 0, 0) < second.setHours(0, 0, 0, 0);
   }
 
 }
diff --git a/BetterIServ.Mobile/src/app/pages/substitution/substitution.page.html b/BetterIServ.Mobile/src/app/pages/substitution/substitution.page.html
index 714f9de..464084d 100644
--- a/BetterIServ.Mobile/src/app/pages/substitution/substitution.page.html
+++ b/BetterIServ.Mobile/src/app/pages/substitution/substitution.page.html
@@ -3,8 +3,49 @@
     <ion-buttons slot="start">
       <ion-menu-button></ion-menu-button>
     </ion-buttons>
-    <ion-title>Vertretungsplan {{data?.date.toLocaleDateString()}}</ion-title>
+    <ion-title (click)="fakeModal.present()">Vertretungsplan {{data?.date.toLocaleDateString()}}</ion-title>
   </ion-toolbar>
+
+  <ion-modal #fakeModal (didDismiss)="addFakeSubstitution($event)">
+    <ng-template>
+      <ion-header>
+        <ion-toolbar>
+          <ion-buttons slot="start">
+            <ion-button (click)="fakeModal.dismiss(null, 'cancel')">Abbrechen</ion-button>
+          </ion-buttons>
+          <ion-title>Fake Vertretung</ion-title>
+          <ion-buttons slot="end">
+            <ion-button (click)="fakeModal.dismiss({type: type.value, course: course.value, lessons: lessons.value, teacher: teacher.value}, 'confirm')">Fertig</ion-button>
+          </ion-buttons>
+        </ion-toolbar>
+      </ion-header>
+      <ion-content class="ion-padding course-content">
+        <ion-item>
+          <ion-label position="stacked">Typ</ion-label>
+          <ion-select aria-label="Typ" interface="action-sheet" value="Entfall" #type>
+            <ion-select-option value="Entfall">Entfall</ion-select-option>
+            <ion-select-option value="Stillarbeit">Stillarbeit</ion-select-option>
+          </ion-select>
+        </ion-item>
+        <ion-item>
+          <ion-label position="stacked">Kurs</ion-label>
+          <ion-select aria-label="Kurs" interface="action-sheet" [value]="courses[0]" #course>
+            <ion-select-option *ngFor="let course of courses" [value]="course">
+              {{course}}
+            </ion-select-option>
+          </ion-select>
+        </ion-item>
+        <ion-item>
+          <ion-label position="stacked">Stunden</ion-label>
+          <ion-input aria-label="Stunden" type="text" #lessons/>
+        </ion-item>
+        <ion-item>
+          <ion-label position="stacked">Lehrer</ion-label>
+          <ion-input aria-label="Lehrer" type="text" #teacher/>
+        </ion-item>
+      </ion-content>
+    </ng-template>
+  </ion-modal>
 </ion-header>
 
 <ion-content [fullscreen]="true">
diff --git a/BetterIServ.Mobile/src/app/pages/substitution/substitution.page.ts b/BetterIServ.Mobile/src/app/pages/substitution/substitution.page.ts
index 191828a..d6878e5 100644
--- a/BetterIServ.Mobile/src/app/pages/substitution/substitution.page.ts
+++ b/BetterIServ.Mobile/src/app/pages/substitution/substitution.page.ts
@@ -3,7 +3,7 @@ import {CommonModule} from '@angular/common';
 import {FormsModule} from '@angular/forms';
 import {AlertController, IonicModule} from '@ionic/angular';
 import {UnitsService} from "../../api/units.service";
-import {UnitsData} from "../../entities/substitution";
+import {Substitution, UnitsData} from "../../entities/substitution";
 import {IServService} from "../../api/iserv.service";
 import {SubstitutionComponent} from "../../components/substitution/substitution.component";
 import {StorageService} from "../../api/storage.service";
@@ -85,4 +85,23 @@ export class SubstitutionPage implements OnInit {
     return this.courses.includes(course);
   }
 
+  public addFakeSubstitution(event: any) {
+    if (event.detail.role != "confirm") return;
+    const data = event.detail.data as {course: string, type: string, lessons: string, teacher: string};
+    const sub: Substitution = {
+      classes: [this.currentClass],
+      lesson: data.course,
+      times: data.lessons.split(" - ").map(Number),
+      type: data.type,
+      teacher: data.teacher,
+      representative: "",
+      newLesson: "",
+      room: "---",
+      description: ""
+    };
+
+    this.data.substitutions.push(sub);
+    this.data.substitutions.sort((a, b) => a.times[0] < b.times[0] ? -1 : 1);
+  }
+
 }