[fix] fix bug of date

app.py

@@ -38,8 +38,9 @@ def add_new_eval(
     submission_repo = Repository(local_dir=SUBMISSION_NAME, clone_from=SUBMISSION_URL, use_auth_token=HF_TOKEN, repo_type="dataset")
     submission_repo.git_pull()
     filename = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
-    update_time = now.strftime("%Y-%m-%d")  # Capture update time
+    
     now = datetime.datetime.now()
+    update_time = now.strftime("%Y-%m-%d")  # Capture update time
     with open(f'{SUBMISSION_NAME}/{filename}.zip','wb') as f:
         f.write(input_file)
     # shutil.copyfile(CSV_DIR, os.path.join(SUBMISSION_NAME, f"{input_file}"))