diff --git a/backend/tasks/api.py b/backend/tasks/api.py
index 4736582..5352f9a 100644
--- a/backend/tasks/api.py
+++ b/backend/tasks/api.py
@@ -7,8 +7,8 @@ from rest_framework.response import Response
 from rest_framework.permissions import IsAuthenticated
 
 from tasks.utils import get_service
-from tasks.models import Task
-from tasks.serializers import TaskUpdateSerializer
+from tasks.models import Todo, RecurrenceTask
+from tasks.serializers import TodoUpdateSerializer, RecurrenceTaskUpdateSerializer
 
 
 class GoogleCalendarEventViewset(viewsets.ViewSet):
@@ -17,28 +17,30 @@ class GoogleCalendarEventViewset(viewsets.ViewSet):
     def __init__(self, *args, **kwargs):
         super().__init__()
         self.current_time = datetime.now(tz=timezone.utc).isoformat()
-        self.event_fields = 'items(id,summary,description,created,updated,start,end)'
+        self.event_fields = 'items(id,summary,description,created,recurringEventId,updated,start,end)'
 
     def _validate_serializer(self, serializer):
         if serializer.is_valid():
             serializer.save()
-            return Response("Task Sync Successfully", status=200)
+            return Response("Validate Successfully", status=200)
         return Response(serializer.errors, status=400)
 
     def post(self, request):
         service = get_service(request)
         events = service.events().list(calendarId='primary', fields=self.event_fields).execute()
         for event in events.get('items', []):
+            if event.get('recurringEventId'):
+                continue
             try:
-                task = Task.objects.get(google_calendar_id=event['id'])
-                serializer = TaskUpdateSerializer(instance=task, data=event)
+                task = Todo.objects.get(google_calendar_id=event['id'])
+                serializer = TodoUpdateSerializer(instance=task, data=event)
                 return self._validate_serializer(serializer)
-            except Task.DoesNotExist:
-                serializer = TaskUpdateSerializer(data=event, user=request.user)
+            except Todo.DoesNotExist:
+                serializer = TodoUpdateSerializer(data=event, user=request.user)
                 return self._validate_serializer(serializer)
                 
     def list(self, request, days=7):
-        max_time = (datetime.now(tz=timezone.utc) + timedelta(days=3)).isoformat()
+        max_time = (datetime.now(tz=timezone.utc) + timedelta(days=days)).isoformat()
         
         service = get_service(request)
         events = []
@@ -49,11 +51,11 @@ class GoogleCalendarEventViewset(viewsets.ViewSet):
                 calendarId='primary',
                 timeMin=self.current_time,
                 timeMax=max_time,
-                maxResults=20,
+                maxResults=200,
                 singleEvents=True,
                 orderBy='startTime',
                 pageToken=next_page_token,
-                fields='items(id,summary,description,created,updated,start,end)',
+                fields='items(id,summary,description,created,recurringEventId,updated,start,end)',
             )
 
             page_results = query.execute()
diff --git a/backend/tasks/apps.py b/backend/tasks/apps.py
index 3ff3ab3..0d81307 100644
--- a/backend/tasks/apps.py
+++ b/backend/tasks/apps.py
@@ -4,3 +4,6 @@ from django.apps import AppConfig
 class TasksConfig(AppConfig):
     default_auto_field = 'django.db.models.BigAutoField'
     name = 'tasks'
+
+    def ready(self):
+        import tasks.signals
\ No newline at end of file
diff --git a/backend/tasks/migrations/0010_todo_alter_subtask_parent_task_delete_task.py b/backend/tasks/migrations/0010_todo_alter_subtask_parent_task_delete_task.py
new file mode 100644
index 0000000..2e6b65d
--- /dev/null
+++ b/backend/tasks/migrations/0010_todo_alter_subtask_parent_task_delete_task.py
@@ -0,0 +1,47 @@
+# Generated by Django 4.2.6 on 2023-11-06 15:01
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('tasks', '0009_alter_task_options_task_importance_and_more'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Todo',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.TextField()),
+                ('notes', models.TextField(default='')),
+                ('importance', models.PositiveSmallIntegerField(choices=[(1, '1'), (2, '2'), (3, '3'), (4, '4'), (5, '5')], default=1)),
+                ('difficulty', models.PositiveSmallIntegerField(choices=[(1, 'Easy'), (2, 'Normal'), (3, 'Hard'), (4, 'Very Hard'), (5, 'Devil')], default=1)),
+                ('challenge', models.BooleanField(default=False)),
+                ('fromSystem', models.BooleanField(default=False)),
+                ('creation_date', models.DateTimeField(auto_now_add=True)),
+                ('last_update', models.DateTimeField(auto_now=True)),
+                ('google_calendar_id', models.CharField(blank=True, max_length=255, null=True)),
+                ('start_event', models.DateTimeField(null=True)),
+                ('end_event', models.DateTimeField(null=True)),
+                ('priority', models.PositiveSmallIntegerField(choices=[(1, 'Important & Urgent'), (2, 'Important & Not Urgent'), (3, 'Not Important & Urgent'), (4, 'Not Important & Not Urgent')], default=4)),
+                ('tags', models.ManyToManyField(blank=True, to='tasks.tag')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+        migrations.AlterField(
+            model_name='subtask',
+            name='parent_task',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='tasks.todo'),
+        ),
+        migrations.DeleteModel(
+            name='Task',
+        ),
+    ]
diff --git a/backend/tasks/migrations/0011_recurrencetask.py b/backend/tasks/migrations/0011_recurrencetask.py
new file mode 100644
index 0000000..cc7225a
--- /dev/null
+++ b/backend/tasks/migrations/0011_recurrencetask.py
@@ -0,0 +1,39 @@
+# Generated by Django 4.2.6 on 2023-11-06 16:14
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('tasks', '0010_todo_alter_subtask_parent_task_delete_task'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='RecurrenceTask',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.TextField()),
+                ('notes', models.TextField(default='')),
+                ('importance', models.PositiveSmallIntegerField(choices=[(1, '1'), (2, '2'), (3, '3'), (4, '4'), (5, '5')], default=1)),
+                ('difficulty', models.PositiveSmallIntegerField(choices=[(1, 'Easy'), (2, 'Normal'), (3, 'Hard'), (4, 'Very Hard'), (5, 'Devil')], default=1)),
+                ('challenge', models.BooleanField(default=False)),
+                ('fromSystem', models.BooleanField(default=False)),
+                ('creation_date', models.DateTimeField(auto_now_add=True)),
+                ('last_update', models.DateTimeField(auto_now=True)),
+                ('google_calendar_id', models.CharField(blank=True, max_length=255, null=True)),
+                ('start_event', models.DateTimeField(null=True)),
+                ('end_event', models.DateTimeField(null=True)),
+                ('recurrence_rule', models.TextField()),
+                ('tags', models.ManyToManyField(blank=True, to='tasks.tag')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]
diff --git a/backend/tasks/models.py b/backend/tasks/models.py
index 7677acb..5da815e 100644
--- a/backend/tasks/models.py
+++ b/backend/tasks/models.py
@@ -1,9 +1,5 @@
-from datetime import datetime
-
 from django.db import models
 from django.conf import settings
-from django.core import validators
-from django.utils import timezone
 
 class Tag(models.Model):
     """
@@ -16,21 +12,16 @@ class Tag(models.Model):
 
 class Task(models.Model):
     """
-    Represents a task, such as Habit, Daily, Todo, or Reward.
-
-    :param type: The type of the tasks
+    Represents a Abstract of task, such as Habit, Daily, Todo, or Reward.
+    
+    :param user: The user who owns the task.
     :param title: Title of the task.
     :param notes: Optional additional notes for the task.
     :param tags: Associated tags for the task.
     :param completed: A boolean field indicating whether the task is completed.
-    :param exp: The experience values user will get from the task.
-    :param priority: The priority of the task (1, 2, .., 4), using Eisenhower Matrix Idea.
     :param importance: The importance of the task (range: 1 to 5)
     :param difficulty: The difficulty of the task (range: 1 to 5).
-    :param attribute: The attribute linked to the task
-    :param user: The user who owns the task.
     :param challenge: Associated challenge (optional).
-    :param reminders: A Many-to-Many relationship with Reminder.
     :param fromSystem: A boolean field indicating if the task is from System.
     :param creation_date: Creation date of the task.
     :param last_update: Last updated date of the task.
@@ -38,87 +29,49 @@ class Task(models.Model):
     :param start_event: Start event of the task.
     :param end_event: End event(Due Date) of the task.
     """
-    TASK_TYPES = [
-        ('daily', 'Daily'),
-        ('habit', 'Habit'),
-        ('todo', 'Todo'),
-        ('Long Term Goal', 'Long Term Goal'),
-    ]
+    class Difficulty(models.IntegerChoices):
+        EASY = 1, 'Easy'
+        NORMAL = 2, 'Normal'
+        HARD = 3, 'Hard'
+        VERY_HARD = 4, 'Very Hard'
+        DEVIL = 5, 'Devil'
 
-    DIFFICULTY_CHOICES = [
-        (1, 'Easy'),
-        (2, 'Normal'),
-        (3, 'Hard'),
-        (4, 'Very Hard'),
-        (5, 'Devil'),
-    ]
-
-    ATTRIBUTE = [
-        ('str', 'Strength'),
-        ('int', 'Intelligence'),
-        ('end', 'Endurance'),
-        ('per', 'Perception'),
-        ('luck', 'Luck'),
-    ]
-
-    EISENHOWER_MATRIX = [
-        (1, 'Important & Urgent'),
-        (2, 'Important & Not Urgent'),
-        (3, 'Not Important & Urgent'),
-        (4, 'Not Important & Not Urgent'),
-    ]
-
-    type = models.CharField(max_length=15, choices=TASK_TYPES, default='habit')
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
     title = models.TextField()
     notes = models.TextField(default='')
     tags = models.ManyToManyField(Tag, blank=True)
-    completed = models.BooleanField(default=False)
-    exp = models.FloatField(default=0)
-    priority = models.PositiveSmallIntegerField(choices=EISENHOWER_MATRIX, default=4)
     importance = models.PositiveSmallIntegerField(choices=[(i, str(i)) for i in range(1, 6)], default=1)
-    difficulty = models.PositiveSmallIntegerField(choices=DIFFICULTY_CHOICES, default=1)
-    attribute = models.CharField(max_length=15, choices=ATTRIBUTE, default='str')
-    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
+    difficulty = models.PositiveSmallIntegerField(choices=Difficulty.choices, default=Difficulty.EASY)
     challenge = models.BooleanField(default=False)
     fromSystem = models.BooleanField(default=False)
     creation_date = models.DateTimeField(auto_now_add=True)
     last_update = models.DateTimeField(auto_now=True)
-    google_calendar_id = models.CharField(blank=True, null=True, max_length=255)
+    google_calendar_id = models.CharField(max_length=255, null=True, blank=True)
     start_event = models.DateTimeField(null=True)
     end_event = models.DateTimeField(null=True)
 
-    def calculate_eisenhower_matrix_category(self):
-        """
-        Classify the task into one of the four categories in the Eisenhower Matrix.
-
-        :return: The category of the task (1, 2, 3, or 4).
-        """
-        if self.end_event:
-            time_until_due = (self.end_event - datetime.now(timezone.utc)).days
-        else:
-            time_until_due = float('inf')
-
-        urgency_threshold = 3
-        importance_threshold = 3
-
-        if time_until_due <= urgency_threshold and self.importance >= importance_threshold:
-            return 1
-        elif time_until_due > urgency_threshold and self.importance >= importance_threshold:
-            return 2
-        elif time_until_due <= urgency_threshold and self.importance < importance_threshold:
-            return 3
-        else:
-            return 4
-
-    def save(self, *args, **kwargs):
-        self.priority = self.calculate_eisenhower_matrix_category()
-        super(Task, self).save(*args, **kwargs)
-
     class Meta:
-        verbose_name = 'Task'
-        verbose_name_plural = 'Tasks'
+        abstract = True
 
 
+class Todo(Task):
+    
+    class EisenhowerMatrix(models.IntegerChoices):
+        IMPORTANT_URGENT = 1, 'Important & Urgent'
+        IMPORTANT_NOT_URGENT = 2, 'Important & Not Urgent'
+        NOT_IMPORTANT_URGENT = 3, 'Not Important & Urgent'
+        NOT_IMPORTANT_NOT_URGENT = 4, 'Not Important & Not Urgent'
+
+    priority = models.PositiveSmallIntegerField(choices=EisenhowerMatrix.choices, default=EisenhowerMatrix.NOT_IMPORTANT_NOT_URGENT)
+
+    def __str__(self):
+        return self.title
+
+class RecurrenceTask(Task):
+    recurrence_rule = models.TextField()
+
+    def __str__(self) -> str:
+        return f"{self.title} ({self.recurrence_rule})"
 
 class Subtask(models.Model):
     """
@@ -127,9 +80,9 @@ class Subtask(models.Model):
     :param completed: A boolean field indicating whether the subtask is completed.
     :param parent_task: The parent task of the subtask.
     """
+    parent_task = models.ForeignKey(Todo, on_delete=models.CASCADE)
     description = models.TextField()
     completed = models.BooleanField(default=False)
-    parent_task = models.ForeignKey(Task, on_delete=models.CASCADE)
 
 
 class UserNotification(models.Model):
diff --git a/backend/tasks/serializers.py b/backend/tasks/serializers.py
index 494920f..ed02300 100644
--- a/backend/tasks/serializers.py
+++ b/backend/tasks/serializers.py
@@ -1,6 +1,6 @@
 from rest_framework import serializers
 from django.utils.dateparse import parse_datetime
-from .models import Task
+from .models import Todo, RecurrenceTask
 
 
 class GoogleCalendarEventSerializer(serializers.Serializer):
@@ -10,7 +10,7 @@ class GoogleCalendarEventSerializer(serializers.Serializer):
     description = serializers.CharField(required=False)
 
 
-class TaskUpdateSerializer(serializers.ModelSerializer):
+class TodoUpdateSerializer(serializers.ModelSerializer):
     id = serializers.CharField(source="google_calendar_id")
     summary = serializers.CharField(source="title")
     description = serializers.CharField(source="notes", required=False)
@@ -21,15 +21,41 @@ class TaskUpdateSerializer(serializers.ModelSerializer):
 
 
     class Meta:
-        model = Task
+        model = Todo
         fields = ('id', 'summary', 'description', 'created', 'updated', 'start_datetime', 'end_datetime')
 
     def __init__(self, *args, **kwargs):
         self.user = kwargs.pop('user', None)
-        super(TaskUpdateSerializer, self).__init__(*args, **kwargs)
+        super(TodoUpdateSerializer, self).__init__(*args, **kwargs)
 
     def create(self, validated_data):
         validated_data['user'] = self.user
-        task = Task.objects.create(**validated_data)
+        task = Todo.objects.create(**validated_data)
+
+        return task
+    
+
+class RecurrenceTaskUpdateSerializer(serializers.ModelSerializer):
+    id = serializers.CharField(source="google_calendar_id")
+    summary = serializers.CharField(source="title")
+    description = serializers.CharField(source="notes", required=False)
+    created = serializers.DateTimeField(source="creation_date")
+    updated = serializers.DateTimeField(source="last_update")
+    recurrence = serializers.DateTimeField(source="recurrence_rule")
+    start_datetime = serializers.DateTimeField(source="start_event", required=False)
+    end_datetime = serializers.DateTimeField(source="end_event", required=False)
+
+
+    class Meta:
+        model = RecurrenceTask
+        fields = ('id', 'summary', 'description', 'created', 'updated', 'recurrence', 'start_datetime', 'end_datetime')
+
+    def __init__(self, *args, **kwargs):
+        self.user = kwargs.pop('user', None)
+        super(RecurrenceTaskUpdateSerializer, self).__init__(*args, **kwargs)
+
+    def create(self, validated_data):
+        validated_data['user'] = self.user
+        task = RecurrenceTask.objects.create(**validated_data)
 
         return task
\ No newline at end of file
diff --git a/backend/tasks/signals.py b/backend/tasks/signals.py
new file mode 100644
index 0000000..af17e57
--- /dev/null
+++ b/backend/tasks/signals.py
@@ -0,0 +1,25 @@
+from django.db.models.signals import pre_save
+from django.dispatch import receiver
+from django.utils import timezone
+
+from tasks.models import Todo
+
+
+@receiver(pre_save, sender=Todo)
+def update_priority(sender, instance, **kwargs):
+    if instance.end_event:
+        time_until_due = (instance.end_event - timezone.now()).days
+    else:
+        time_until_due = float('inf')
+
+    urgency_threshold = 3
+    importance_threshold = 3
+
+    if time_until_due <= urgency_threshold and instance.importance >= importance_threshold:
+        instance.priority = Todo.EisenhowerMatrix.IMPORTANT_URGENT
+    elif time_until_due > urgency_threshold and instance.importance >= importance_threshold:
+        instance.priority = Todo.EisenhowerMatrix.IMPORTANT_NOT_URGENT
+    elif time_until_due <= urgency_threshold and instance.importance < importance_threshold:
+        instance.priority = Todo.EisenhowerMatrix.NOT_IMPORTANT_URGENT
+    else:
+        instance.priority = Todo.EisenhowerMatrix.NOT_IMPORTANT_NOT_URGENT
\ No newline at end of file
diff --git a/backend/tasks/tasks/serializers.py b/backend/tasks/tasks/serializers.py
index 7876263..85f0281 100644
--- a/backend/tasks/tasks/serializers.py
+++ b/backend/tasks/tasks/serializers.py
@@ -1,21 +1,21 @@
 from rest_framework import serializers
-from ..models import Task
+from ..models import Todo
 
 class TaskCreateSerializer(serializers.ModelSerializer):
     class Meta:
-        model = Task
+        model = Todo
         # fields = '__all__'
         exclude = ('tags',)
 
     def create(self, validated_data):
         # Create a new task with validated data
-        return Task.objects.create(**validated_data)
+        return Todo.objects.create(**validated_data)
     
 class TaskGeneralSerializer(serializers.ModelSerializer):
     class Meta:
-        model = Task
+        model = Todo
         fields = '__all__'
 
     def create(self, validated_data):
         # Create a new task with validated data
-        return Task.objects.create(**validated_data)
\ No newline at end of file
+        return Todo.objects.create(**validated_data)
\ No newline at end of file
diff --git a/backend/tasks/tasks/views.py b/backend/tasks/tasks/views.py
index 0f75ced..4077315 100644
--- a/backend/tasks/tasks/views.py
+++ b/backend/tasks/tasks/views.py
@@ -2,11 +2,11 @@ from rest_framework import status
 from rest_framework.response import Response
 from rest_framework.generics import CreateAPIView, RetrieveAPIView, RetrieveUpdateAPIView, DestroyAPIView
 from rest_framework.permissions import IsAuthenticated
-from ..models import Task
+from ..models import Todo
 from .serializers import TaskCreateSerializer, TaskGeneralSerializer
 
 class TaskCreateView(CreateAPIView):
-    queryset = Task.objects.all()
+    queryset = Todo.objects.all()
     serializer_class = TaskCreateSerializer
     permission_classes = [IsAuthenticated]
 
@@ -21,17 +21,17 @@ class TaskCreateView(CreateAPIView):
 
 
 class TaskRetrieveView(RetrieveAPIView):
-    queryset = Task.objects.all()
+    queryset = Todo.objects.all()
     serializer_class = TaskGeneralSerializer
     permission_classes = [IsAuthenticated]
 
 
 class TaskUpdateView(RetrieveUpdateAPIView):
-    queryset = Task.objects.all()
+    queryset = Todo.objects.all()
     serializer_class = TaskGeneralSerializer
     permission_classes = [IsAuthenticated]
 
 
 class TaskDeleteView(DestroyAPIView):
-    queryset = Task.objects.all()
+    queryset = Todo.objects.all()
     permission_classes = [IsAuthenticated]
\ No newline at end of file
diff --git a/backend/tasks/tests/test_deserializer.py b/backend/tasks/tests/test_deserializer.py
index aa07480..306185c 100644
--- a/backend/tasks/tests/test_deserializer.py
+++ b/backend/tasks/tests/test_deserializer.py
@@ -5,8 +5,8 @@ from django.test import TestCase
 from django.utils import timezone
 
 from tasks.tests.utils import create_test_user, login_user
-from tasks.serializers import TaskUpdateSerializer
-from tasks.models import Task
+from tasks.serializers import TodoUpdateSerializer
+from tasks.models import Todo
 
 class TaskUpdateSerializerTest(TestCase):
     def setUp(self):
@@ -25,14 +25,14 @@ class TaskUpdateSerializerTest(TestCase):
             'end_datetie': self.end_time,
         }
 
-        serializer = TaskUpdateSerializer(data=data, user=self.user)
+        serializer = TodoUpdateSerializer(data=data, user=self.user)
         self.assertTrue(serializer.is_valid())
         serializer.is_valid()
         task = serializer.save()
-        self.assertIsInstance(task, Task)
+        self.assertIsInstance(task, Todo)
 
     def test_serializer_update(self):
-        task = Task.objects.create(title='Original Task', notes='Original description', user=self.user)
+        task = Todo.objects.create(title='Original Task', notes='Original description', user=self.user)
 
         data = {
             'id': '32141cwaNcapufh8jq2conw',
@@ -44,7 +44,7 @@ class TaskUpdateSerializerTest(TestCase):
             'end_datetie': self.end_time,
         }
 
-        serializer = TaskUpdateSerializer(instance=task, data=data)
+        serializer = TodoUpdateSerializer(instance=task, data=data)
         self.assertTrue(serializer.is_valid())
         updated_task = serializer.save()
 
diff --git a/backend/tasks/tests/test_task_eisenhower.py b/backend/tasks/tests/test_task_eisenhower.py
deleted file mode 100644
index b8b3c22..0000000
--- a/backend/tasks/tests/test_task_eisenhower.py
+++ /dev/null
@@ -1,38 +0,0 @@
-from datetime import datetime, timedelta, timezone
-
-from django.test import TestCase
-
-from tasks.models import Task
-from tasks.tests.utils import create_test_user
-
-class TaskModelTest(TestCase):
-    def setUp(self):
-        self.user = create_test_user()
-
-    def test_eisenhower_matrix_category(self):
-        task = Task(importance=2, end_event=None, user=self.user)
-        task.save()
-
-        # 'Not Important & Not Urgent' category (category 4)
-        self.assertEqual(task.calculate_eisenhower_matrix_category(), 4)
-
-        due_date = datetime.now(timezone.utc) + timedelta(days=1)
-        task = Task(importance=4, end_event=due_date, user=self.user)
-        task.save()
-
-        # 'Important & Urgent' category (category 1)
-        self.assertEqual(task.calculate_eisenhower_matrix_category(), 1)
-
-        due_date = datetime.now(timezone.utc) + timedelta(days=10)
-        task = Task(importance=3, end_event=due_date, user=self.user)
-        task.save()
-
-        # 'Important & Not Urgent' category (category 2)
-        self.assertEqual(task.calculate_eisenhower_matrix_category(), 2)
-
-        due_date = datetime.now(timezone.utc) + timedelta(days=4)
-        task = Task(importance=1, end_event=due_date, user=self.user)
-        task.save()
-
-        # 'Not Important & Urgent' category (category 3)
-        self.assertEqual(task.calculate_eisenhower_matrix_category(), 3)
\ No newline at end of file
diff --git a/backend/tasks/tests/test_task_creation.py b/backend/tasks/tests/test_todo_creation.py
similarity index 82%
rename from backend/tasks/tests/test_task_creation.py
rename to backend/tasks/tests/test_todo_creation.py
index af7986f..0852fbe 100644
--- a/backend/tasks/tests/test_task_creation.py
+++ b/backend/tasks/tests/test_todo_creation.py
@@ -5,9 +5,9 @@ from rest_framework import status
 from rest_framework.test import APITestCase
 
 from tasks.tests.utils import create_test_user, login_user
-from ..models import Task
+from ..models import Todo
 
-class TaskCreateViewTests(APITestCase):
+class TodoCreateViewTests(APITestCase):
     def setUp(self):
 
         self.user = create_test_user()
@@ -16,7 +16,7 @@ class TaskCreateViewTests(APITestCase):
         self.due_date = datetime.now() + timedelta(days=5)
 
 
-    def test_create_valid_task(self):
+    def test_create_valid_todo(self):
         """
         Test creating a valid task using the API.
         """
@@ -32,10 +32,10 @@ class TaskCreateViewTests(APITestCase):
         }
         response = self.client.post(self.url, data, format='json')
         self.assertEqual(response.status_code, status.HTTP_201_CREATED)
-        self.assertEqual(Task.objects.count(), 1)
-        self.assertEqual(Task.objects.get().title, 'Test Task')
+        self.assertEqual(Todo.objects.count(), 1)
+        self.assertEqual(Todo.objects.get().title, 'Test Task')
 
-    def test_create_invalid_task(self):
+    def test_create_invalid_todo(self):
         """
         Test creating an invalid task using the API.
         """
@@ -45,7 +45,7 @@ class TaskCreateViewTests(APITestCase):
 
         response = self.client.post(self.url, data, format='json')
         self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
-        self.assertEqual(Task.objects.count(), 0)  # No task should be created
+        self.assertEqual(Todo.objects.count(), 0)  # No task should be created
 
     def test_missing_required_fields(self):
         """
@@ -58,7 +58,7 @@ class TaskCreateViewTests(APITestCase):
 
         response = self.client.post(self.url, data, format='json')
         self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
-        self.assertEqual(Task.objects.count(), 0)  # No task should be created
+        self.assertEqual(Todo.objects.count(), 0)  # No task should be created
 
     def test_invalid_user_id(self):
         """
@@ -76,4 +76,4 @@ class TaskCreateViewTests(APITestCase):
 
         response = self.client.post(self.url, data, format='json')
         self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
-        self.assertEqual(Task.objects.count(), 0)  # No task should be created
+        self.assertEqual(Todo.objects.count(), 0)  # No task should be created
diff --git a/backend/tasks/tests/test_todo_eisenhower.py b/backend/tasks/tests/test_todo_eisenhower.py
new file mode 100644
index 0000000..41ee078
--- /dev/null
+++ b/backend/tasks/tests/test_todo_eisenhower.py
@@ -0,0 +1,36 @@
+from datetime import datetime, timedelta, timezone
+from django.test import TestCase
+from tasks.models import Todo
+from tasks.tests.utils import create_test_user
+
+class TodoPriorityTest(TestCase):
+    def setUp(self):
+        self.user = create_test_user()
+
+    def test_priority_calculation(self):
+        # Important = 2, Till Due = none
+        todo = Todo(importance=2, end_event=None, user=self.user)
+        todo.save()
+        # 'Not Important & Not Urgent'
+        self.assertEqual(todo.priority, Todo.EisenhowerMatrix.NOT_IMPORTANT_NOT_URGENT)
+
+        due_date = datetime.now(timezone.utc) + timedelta(days=1)
+        # Important = 4, Till Due = 1
+        todo = Todo(importance=4, end_event=due_date, user=self.user)
+        todo.save()
+        # 'Important & Urgent'
+        self.assertEqual(todo.priority, Todo.EisenhowerMatrix.IMPORTANT_URGENT)
+
+        due_date = datetime.now(timezone.utc) + timedelta(days=10)
+        # Important = 3, Till Due = 10
+        todo = Todo(importance=3, end_event=due_date, user=self.user)
+        todo.save()
+        # 'Important & Not Urgent'
+        self.assertEqual(todo.priority, Todo.EisenhowerMatrix.IMPORTANT_NOT_URGENT)
+
+        due_date = datetime.now(timezone.utc) + timedelta(days=2)
+        # Important = 1, Till Due = 2
+        todo = Todo(importance=1, end_event=due_date, user=self.user)
+        todo.save()
+        # 'Not Important & Urgent'
+        self.assertEqual(todo.priority, Todo.EisenhowerMatrix.NOT_IMPORTANT_URGENT)
diff --git a/backend/tasks/tests/utils.py b/backend/tasks/tests/utils.py
index f33b828..b1bef0b 100644
--- a/backend/tasks/tests/utils.py
+++ b/backend/tasks/tests/utils.py
@@ -1,7 +1,7 @@
 from rest_framework.test import APIClient
 
 from users.models import CustomUser
-from ..models import Task
+from ..models import Todo
 
 
 def create_test_user(email="testusertestuser@example.com", username="testusertestuser",
@@ -61,4 +61,4 @@ def create_test_task(user, **kwargs):
 
     task_attributes = {**defaults, **kwargs}
 
-    return Task.objects.create(user=user, **task_attributes)
\ No newline at end of file
+    return Todo.objects.create(user=user, **task_attributes)
\ No newline at end of file