diff --git a/dta_service/core/models.py b/dta_service/core/models.py
index 3fc7c94..06aa76b 100644
--- a/dta_service/core/models.py
+++ b/dta_service/core/models.py
@@ -8,6 +8,28 @@ from django.conf import settings
 import uuid
 import os
 
+class TimeInfoBase(models.Model):
+
+    created = models.DateTimeField(default=timezone.now)
+    last_modified = models.DateTimeField(default=timezone.now)
+
+    class Meta:
+        abstract = True
+
+        def save(self, *args, **kwargs):
+            if not kwargs.pop("skip_last_modified", False) and not hasattr(
+                self, "skip_last_modified"
+):
+                       self.last_modified = timezone.now()
+                                                                                if kwargs.get("update_fields") is not None:
+                                                                                                kwargs["update_fields"] = list(
+                                                                                                                    {*kwargs["update_fields"], "last_modified"}
+                                                                                                                                    )
+
+                                                                                                                                            super().save(*args, **kwargs)
+
+
+
 class UserManager(BaseUserManager):
     def create_user(self, email, password=None, **extra_fields):
         if not email: