diff --git a/app/Notifications/TaskDateUpdated.php b/app/Notifications/TaskDateUpdated.php
new file mode 100644
index 0000000..9bbc818
--- /dev/null
+++ b/app/Notifications/TaskDateUpdated.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace App\Notifications;
+
+use App\Mail\TaskDateUpdateMail;
+use App\Models\Event;
+use App\Models\Task;
+use Illuminate\Bus\Queueable;
+use Illuminate\Notifications\Notification;
+use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
+use Illuminate\Notifications\Messages\BroadcastMessage;
+use Illuminate\Support\Facades\Mail;
+
+class TaskDateUpdated extends Notification implements ShouldBroadcast
+{
+    use Queueable;
+
+    public function __construct(
+        public Task $task,
+        public Event $event,
+        public string $oldStart,
+        public string $oldEnd,
+        public string $newStart,
+        public string $newEnd,
+    ) {}
+
+    public function via($notifiable): array
+    {
+        $channels = [];
+
+        if ($notifiable->web_notifications) {
+            $channels[] = 'database';
+            $channels[] = 'broadcast';
+        }
+
+        if ($notifiable->email_notifications) {
+            $channels[] = 'mail';
+        }
+
+        return $channels;
+    }
+
+    public function toDatabase($notifiable): array
+    {
+        return [
+            'message'  => "La date de la tâche {$this->task->name} de l'événement {$this->event->name} a été mise à jour. Cette tâche aura maintenant lieu du {$this->newStart} au {$this->newEnd}.",
+            'task_id'  => $this->task->id,
+            'event_id' => $this->event->id,
+            'old_start' => $this->oldStart,
+            'old_end'   => $this->oldEnd,
+            'new_start' => $this->newStart,
+            'new_end'   => $this->newEnd,
+        ];
+    }
+
+    public function toBroadcast($notifiable): BroadcastMessage
+    {
+        return new BroadcastMessage($this->toDatabase($notifiable));
+    }
+
+    public function toMail($notifiable): void
+    {
+        Mail::to($notifiable->email)->send(new TaskDateUpdateMail([
+            'name'      => $notifiable->name,
+            'lastname'  => $notifiable->lastname,
+            'taskName'  => $this->task->name,
+            'oldStart'  => $this->oldStart,
+            'oldEnd'    => $this->oldEnd,
+            'newStart'  => $this->newStart,
+            'newEnd'    => $this->newEnd,
+            'eventName' => $this->event->name,
+        ]));
+    }
+}