Update app.py

app.py

@@ -1,6 +1,6 @@
 import gradio as gr
 from huggingface_hub import whoami
-import datetime
+from datetime import datetime, timezone
 from dataset_uploader import ParquetScheduler
 
 ##########
@@ -125,7 +125,7 @@ def save_sft_data(system_prompt="", history=[], sft_chat_format="sharegpt", oaut
     history = setup_submission(system_prompt, history, sft_chat_format)
     # preparing the submission
     data = {"contributor": contributor_username}
-    data["timestamp"] = str(datetime.datetime.now(datetime.UTC))
+    data["timestamp"] = str(datetime.now(timezone.utc))
     data["chat_format"] = sft_chat_format
     data["conversations"] = history