diff --git a/users/services.py b/users/services.py
index af36696..ca6c318 100644
--- a/users/services.py
+++ b/users/services.py
@@ -5,8 +5,6 @@ from portfolios.models import *
 from django.utils import timezone
 from datetime import timedelta
 
-# 30일 이전 일수 계산
-thirty_days_ago = timezone.now() - timedelta(days=30)
 
 DUPLICATE_CHECK = {
     'email': 'email',
@@ -37,10 +35,12 @@ class CheckUserFieldValueExistService:
 class UserToNotificationService:
     @staticmethod
     def get_new_notification_count(user: User):
+        thirty_days_ago = timezone.now() - timedelta(days=30)
         return user.notifications.filter(created_at__gt=thirty_days_ago, is_read=False).count()
     
     @staticmethod
     def get_all_notification(user: User):
+        thirty_days_ago = timezone.now() - timedelta(days=30)
         return user.notifications.filter(created_at__gt=thirty_days_ago)