diff --git a/backend/models/resource_model.py b/backend/models/resource_model.py
index 8c9fde0..81e49cc 100644
--- a/backend/models/resource_model.py
+++ b/backend/models/resource_model.py
@@ -12,4 +12,4 @@ class Resource(BaseModel):
     summary: str = Field(..., max_length=300, description="The summary of the resource")
     link: str = Field(..., max_length=150, description="link to the resource")
     program: ProgramTypeEnum
-    created_at: Optional[datetime]
+    created_at: Optional[datetime] = datetime.now()
diff --git a/backend/models/service_model.py b/backend/models/service_model.py
index 36c336b..9671974 100644
--- a/backend/models/service_model.py
+++ b/backend/models/service_model.py
@@ -8,7 +8,7 @@ from .enum_for_models import ProgramTypeEnum
 
 class Service(BaseModel):
     id: int | None = None
-    created_at: datetime | None = None
+    created_at: datetime | None = datetime.now()
     name: str
     status: str
     summary: str
diff --git a/backend/models/tag_model.py b/backend/models/tag_model.py
index 44dcb02..fee566c 100644
--- a/backend/models/tag_model.py
+++ b/backend/models/tag_model.py
@@ -10,4 +10,4 @@ class Tag(BaseModel):
     content: str = Field(
         ..., max_length=600, description="content associated with the tag"
     )
-    created_at: datetime | None = None
+    created_at: datetime | None = datetime.now()
diff --git a/backend/models/user_model.py b/backend/models/user_model.py
index d7c1521..e2c25da 100644
--- a/backend/models/user_model.py
+++ b/backend/models/user_model.py
@@ -14,5 +14,5 @@ class User(BaseModel):
     group: str
     program: List[ProgramTypeEnum]
     role: UserTypeEnum
-    created_at: Optional[datetime]
+    created_at: Optional[datetime] = datetime.now()
     uuid: str | None = None