dashboard/backend/routers/opc_tasks.py

@@ -79,6 +79,8 @@ async def create_task(
 ):
     """Create a new task"""
     user: User = request.state.user
+    # Strip timezone info from due_date if present (database uses TIMESTAMP not TIMESTAMPTZ)
+    due_date = task.due_date.replace(tzinfo=None) if task.due_date else None
     created_task = await opc_db.create_task(
         title=task.title,
         description=task.description,
@@ -88,7 +90,7 @@ async def create_task(
         assigned_to=task.assigned_to,
         assigned_type=task.assigned_type,
         tags=task.tags,
-        due_date=task.due_date,
+        due_date=due_date,
         actor=user.username
     )