Update app.py

app.py

@@ -225,6 +225,22 @@ def process_and_store_bubble_token(url_user_token, org_urn, token_state):
                  follower_stats_need_sync = True 
                  logging.info("Follower stats need sync: No valid dates in monthly gains after conversion.")
             else:
+                
+                # CRITICAL FIX: Ensure last_gain_date is timezone-aware (UTC) before comparison.
+                # pd.Timestamp.tzinfo is None checks if it's naive.
+                # pd.Timestamp.tzinfo.utcoffset(pd.Timestamp) is None is a more robust check for naivety.
+                if last_gain_date.tzinfo is None or last_gain_date.tzinfo.utcoffset(last_gain_date) is None:
+                    # If last_gain_date is naive, localize it to UTC.
+                    # This assumes naive dates should be interpreted as UTC.
+                    last_gain_date = last_gain_date.tz_localize('UTC')
+                    logging.info(f"Localized naive last_gain_date to UTC: {last_gain_date}")
+                else:
+                    # If last_gain_date is already timezone-aware, convert it to UTC.
+                    # This handles cases where it might be aware but in a different timezone.
+                    # If it's already UTC, tz_convert('UTC') is a no-op.
+                    last_gain_date = last_gain_date.tz_convert('UTC')
+                    logging.info(f"Converted aware last_gain_date to UTC: {last_gain_date}")
+                
                 # Sync if the last recorded gain is for a month *before* the start of the current month.
                 # This ensures we attempt to fetch the previous month's data if it's not there.
                 start_of_current_month = pd.Timestamp('now', tz='UTC').normalize().replace(day=1)