diff --git a/apps/timetable/serialziers.py b/apps/timetable/serialziers.py
index 06483d90..ecd4127e 100644
--- a/apps/timetable/serialziers.py
+++ b/apps/timetable/serialziers.py
@@ -79,7 +79,13 @@ class ScheduleCreateSerializer(ScheduleRUDSerializer):
         return instance
 
 class TimetableSerializer(serializers.ModelSerializer):
+    """Serailzier for Timetable model."""
+    weekday_display = serializers.CharField(source='get_weekday_display',
+                                            read_only=True)
 
     class Meta:
         model = Timetable
-        fields = '__all__'
+        fields = (
+            'id',
+            'weekday_display',
+        )