diff --git a/gateway/app/core/service_discovery.py b/gateway/app/core/service_discovery.py
index 3bce2bfd..78b58337 100644
--- a/gateway/app/core/service_discovery.py
+++ b/gateway/app/core/service_discovery.py
@@ -96,7 +96,7 @@ class ServiceDiscovery:
             key = f"service_health:{service_name}"
             value = {
                 "healthy": is_healthy,
-                "last_check": datetime.utcnow().isoformat(),
+                "last_check":  datetime.now(datetime.timezone.utc).isoformat(),
                 "url": self.services[service_name]
             }
             
diff --git a/gateway/shared/auth/jwt_handler.py b/gateway/shared/auth/jwt_handler.py
index 50264943..2eae4724 100644
--- a/gateway/shared/auth/jwt_handler.py
+++ b/gateway/shared/auth/jwt_handler.py
@@ -22,9 +22,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(minutes=30)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(minutes=30)
         
         to_encode.update({"exp": expire, "type": "access"})
         
@@ -36,9 +36,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(days=7)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(days=7)
         
         to_encode.update({"exp": expire, "type": "refresh"})
         
diff --git a/gateway/shared/messaging/events.py b/gateway/shared/messaging/events.py
index 812e972d..cf8f8162 100644
--- a/gateway/shared/messaging/events.py
+++ b/gateway/shared/messaging/events.py
@@ -21,7 +21,7 @@ class BaseEvent:
         if not self.event_id:
             self.event_id = str(uuid.uuid4())
         if not self.timestamp:
-            self.timestamp = datetime.utcnow()
+            self.timestamp =  datetime.now(datetime.timezone.utc)
 
 # Training Events
 @dataclass
diff --git a/services/auth/app/services/auth_service.py b/services/auth/app/services/auth_service.py
index 9cf280c8..bb74b2fa 100644
--- a/services/auth/app/services/auth_service.py
+++ b/services/auth/app/services/auth_service.py
@@ -61,7 +61,7 @@ class AuthService:
             UserRegisteredEvent(
                 event_id="",
                 service_name="auth-service",
-                timestamp=datetime.utcnow(),
+                timestamp= datetime.now(datetime.timezone.utc),
                 data={
                     "user_id": str(user.id),
                     "email": user.email,
@@ -111,7 +111,7 @@ class AuthService:
         await db.execute(
             update(User)
             .where(User.id == user.id)
-            .values(last_login=datetime.utcnow())
+            .values(last_login= datetime.now(datetime.timezone.utc))
         )
         await db.commit()
         
@@ -133,7 +133,7 @@ class AuthService:
         session = UserSession(
             user_id=user.id,
             refresh_token_hash=security_manager.hash_password(refresh_token),
-            expires_at=datetime.utcnow() + timedelta(days=7),
+            expires_at= datetime.now(datetime.timezone.utc) + timedelta(days=7),
             ip_address=ip_address,
             user_agent=user_agent
         )
@@ -148,7 +148,7 @@ class AuthService:
             UserLoginEvent(
                 event_id="",
                 service_name="auth-service",
-                timestamp=datetime.utcnow(),
+                timestamp= datetime.now(datetime.timezone.utc),
                 data={
                     "user_id": str(user.id),
                     "email": user.email,
diff --git a/services/auth/shared/auth/jwt_handler.py b/services/auth/shared/auth/jwt_handler.py
index 50264943..2eae4724 100644
--- a/services/auth/shared/auth/jwt_handler.py
+++ b/services/auth/shared/auth/jwt_handler.py
@@ -22,9 +22,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(minutes=30)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(minutes=30)
         
         to_encode.update({"exp": expire, "type": "access"})
         
@@ -36,9 +36,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(days=7)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(days=7)
         
         to_encode.update({"exp": expire, "type": "refresh"})
         
diff --git a/services/auth/shared/messaging/events.py b/services/auth/shared/messaging/events.py
index 812e972d..affa94a2 100644
--- a/services/auth/shared/messaging/events.py
+++ b/services/auth/shared/messaging/events.py
@@ -21,7 +21,7 @@ class BaseEvent:
         if not self.event_id:
             self.event_id = str(uuid.uuid4())
         if not self.timestamp:
-            self.timestamp = datetime.utcnow()
+            self.timestamp = datetime.now(datetime.timezone.utc)
 
 # Training Events
 @dataclass
diff --git a/services/data/shared/auth/jwt_handler.py b/services/data/shared/auth/jwt_handler.py
index 50264943..2eae4724 100644
--- a/services/data/shared/auth/jwt_handler.py
+++ b/services/data/shared/auth/jwt_handler.py
@@ -22,9 +22,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(minutes=30)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(minutes=30)
         
         to_encode.update({"exp": expire, "type": "access"})
         
@@ -36,9 +36,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(days=7)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(days=7)
         
         to_encode.update({"exp": expire, "type": "refresh"})
         
diff --git a/services/data/shared/messaging/events.py b/services/data/shared/messaging/events.py
index 812e972d..cf8f8162 100644
--- a/services/data/shared/messaging/events.py
+++ b/services/data/shared/messaging/events.py
@@ -21,7 +21,7 @@ class BaseEvent:
         if not self.event_id:
             self.event_id = str(uuid.uuid4())
         if not self.timestamp:
-            self.timestamp = datetime.utcnow()
+            self.timestamp =  datetime.now(datetime.timezone.utc)
 
 # Training Events
 @dataclass
diff --git a/services/forecasting/shared/auth/jwt_handler.py b/services/forecasting/shared/auth/jwt_handler.py
index 50264943..2eae4724 100644
--- a/services/forecasting/shared/auth/jwt_handler.py
+++ b/services/forecasting/shared/auth/jwt_handler.py
@@ -22,9 +22,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(minutes=30)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(minutes=30)
         
         to_encode.update({"exp": expire, "type": "access"})
         
@@ -36,9 +36,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(days=7)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(days=7)
         
         to_encode.update({"exp": expire, "type": "refresh"})
         
diff --git a/services/forecasting/shared/messaging/events.py b/services/forecasting/shared/messaging/events.py
index 812e972d..cf8f8162 100644
--- a/services/forecasting/shared/messaging/events.py
+++ b/services/forecasting/shared/messaging/events.py
@@ -21,7 +21,7 @@ class BaseEvent:
         if not self.event_id:
             self.event_id = str(uuid.uuid4())
         if not self.timestamp:
-            self.timestamp = datetime.utcnow()
+            self.timestamp =  datetime.now(datetime.timezone.utc)
 
 # Training Events
 @dataclass
diff --git a/services/notification/shared/auth/jwt_handler.py b/services/notification/shared/auth/jwt_handler.py
index 50264943..2eae4724 100644
--- a/services/notification/shared/auth/jwt_handler.py
+++ b/services/notification/shared/auth/jwt_handler.py
@@ -22,9 +22,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(minutes=30)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(minutes=30)
         
         to_encode.update({"exp": expire, "type": "access"})
         
@@ -36,9 +36,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(days=7)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(days=7)
         
         to_encode.update({"exp": expire, "type": "refresh"})
         
diff --git a/services/notification/shared/messaging/events.py b/services/notification/shared/messaging/events.py
index 812e972d..cf8f8162 100644
--- a/services/notification/shared/messaging/events.py
+++ b/services/notification/shared/messaging/events.py
@@ -21,7 +21,7 @@ class BaseEvent:
         if not self.event_id:
             self.event_id = str(uuid.uuid4())
         if not self.timestamp:
-            self.timestamp = datetime.utcnow()
+            self.timestamp =  datetime.now(datetime.timezone.utc)
 
 # Training Events
 @dataclass
diff --git a/services/tenant/shared/auth/jwt_handler.py b/services/tenant/shared/auth/jwt_handler.py
index 50264943..2eae4724 100644
--- a/services/tenant/shared/auth/jwt_handler.py
+++ b/services/tenant/shared/auth/jwt_handler.py
@@ -22,9 +22,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(minutes=30)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(minutes=30)
         
         to_encode.update({"exp": expire, "type": "access"})
         
@@ -36,9 +36,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(days=7)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(days=7)
         
         to_encode.update({"exp": expire, "type": "refresh"})
         
diff --git a/services/tenant/shared/messaging/events.py b/services/tenant/shared/messaging/events.py
index 812e972d..cf8f8162 100644
--- a/services/tenant/shared/messaging/events.py
+++ b/services/tenant/shared/messaging/events.py
@@ -21,7 +21,7 @@ class BaseEvent:
         if not self.event_id:
             self.event_id = str(uuid.uuid4())
         if not self.timestamp:
-            self.timestamp = datetime.utcnow()
+            self.timestamp =  datetime.now(datetime.timezone.utc)
 
 # Training Events
 @dataclass
diff --git a/services/training/app/services/training_service.py b/services/training/app/services/training_service.py
index efb52ae7..8f5d9cda 100644
--- a/services/training/app/services/training_service.py
+++ b/services/training/app/services/training_service.py
@@ -46,8 +46,8 @@ class TrainingService:
             progress=0,
             current_step="Queued for training",
             requested_by=user_data.get("user_id"),
-            training_data_from=datetime.utcnow() - timedelta(days=request.training_days),
-            training_data_to=datetime.utcnow()
+            training_data_from= datetime.now(datetime.timezone.utc) - timedelta(days=request.training_days),
+            training_data_to= datetime.now(datetime.timezone.utc)
         )
         
         db.add(training_job)
@@ -64,7 +64,7 @@ class TrainingService:
             TrainingStartedEvent(
                 event_id=str(uuid.uuid4()),
                 service_name="training-service",
-                timestamp=datetime.utcnow(),
+                timestamp= datetime.now(datetime.timezone.utc),
                 data={
                     "job_id": str(training_job.id),
                     "tenant_id": tenant_id,
@@ -206,7 +206,7 @@ class TrainingService:
     async def _execute_training(self, job_id: str, request: TrainingRequest, db: AsyncSession):
         """Execute training job"""
         
-        start_time = datetime.utcnow()
+        start_time =  datetime.now(datetime.timezone.utc)
         
         try:
             # Update job status
@@ -229,7 +229,7 @@ class TrainingService:
             await self._save_trained_models(job_id, models_result, validation_result, db)
             
             # Complete job
-            duration = int((datetime.utcnow() - start_time).total_seconds())
+            duration = int(( datetime.now(datetime.timezone.utc) - start_time).total_seconds())
             await self._complete_job(job_id, models_result, validation_result, duration, db)
             
             # Publish completion event
@@ -239,7 +239,7 @@ class TrainingService:
                 TrainingCompletedEvent(
                     event_id=str(uuid.uuid4()),
                     service_name="training-service",
-                    timestamp=datetime.utcnow(),
+                    timestamp= datetime.now(datetime.timezone.utc),
                     data={
                         "job_id": str(job_id),
                         "models_trained": len(models_result),
@@ -263,7 +263,7 @@ class TrainingService:
                 TrainingFailedEvent(
                     event_id=str(uuid.uuid4()),
                     service_name="training-service",
-                    timestamp=datetime.utcnow(),
+                    timestamp= datetime.now(datetime.timezone.utc),
                     data={
                         "job_id": str(job_id),
                         "error": str(e)
@@ -281,7 +281,7 @@ class TrainingService:
                 status=status,
                 progress=progress,
                 current_step=current_step,
-                updated_at=datetime.utcnow()
+                updated_at= datetime.now(datetime.timezone.utc)
             )
         )
         await db.commit()
@@ -374,7 +374,7 @@ class TrainingService:
                 status="completed",
                 progress=100,
                 current_step="Training completed successfully",
-                completed_at=datetime.utcnow(),
+                completed_at= datetime.now(datetime.timezone.utc),
                 duration_seconds=duration,
                 models_trained=models_result,
                 metrics=metrics,
diff --git a/services/training/shared/auth/jwt_handler.py b/services/training/shared/auth/jwt_handler.py
index 50264943..2eae4724 100644
--- a/services/training/shared/auth/jwt_handler.py
+++ b/services/training/shared/auth/jwt_handler.py
@@ -22,9 +22,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(minutes=30)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(minutes=30)
         
         to_encode.update({"exp": expire, "type": "access"})
         
@@ -36,9 +36,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(days=7)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(days=7)
         
         to_encode.update({"exp": expire, "type": "refresh"})
         
diff --git a/services/training/shared/messaging/events.py b/services/training/shared/messaging/events.py
index 812e972d..cf8f8162 100644
--- a/services/training/shared/messaging/events.py
+++ b/services/training/shared/messaging/events.py
@@ -21,7 +21,7 @@ class BaseEvent:
         if not self.event_id:
             self.event_id = str(uuid.uuid4())
         if not self.timestamp:
-            self.timestamp = datetime.utcnow()
+            self.timestamp =  datetime.now(datetime.timezone.utc)
 
 # Training Events
 @dataclass
diff --git a/shared/auth/jwt_handler.py b/shared/auth/jwt_handler.py
index 50264943..2eae4724 100644
--- a/shared/auth/jwt_handler.py
+++ b/shared/auth/jwt_handler.py
@@ -22,9 +22,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(minutes=30)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(minutes=30)
         
         to_encode.update({"exp": expire, "type": "access"})
         
@@ -36,9 +36,9 @@ class JWTHandler:
         to_encode = data.copy()
         
         if expires_delta:
-            expire = datetime.utcnow() + expires_delta
+            expire =  datetime.now(datetime.timezone.utc) + expires_delta
         else:
-            expire = datetime.utcnow() + timedelta(days=7)
+            expire =  datetime.now(datetime.timezone.utc) + timedelta(days=7)
         
         to_encode.update({"exp": expire, "type": "refresh"})
         
diff --git a/shared/messaging/events.py b/shared/messaging/events.py
index 812e972d..cf8f8162 100644
--- a/shared/messaging/events.py
+++ b/shared/messaging/events.py
@@ -21,7 +21,7 @@ class BaseEvent:
         if not self.event_id:
             self.event_id = str(uuid.uuid4())
         if not self.timestamp:
-            self.timestamp = datetime.utcnow()
+            self.timestamp =  datetime.now(datetime.timezone.utc)
 
 # Training Events
 @dataclass