ueshin commented on code in PR #53161:
URL: https://github.com/apache/spark/pull/53161#discussion_r2557957966


##########
python/pyspark/worker.py:
##########
@@ -3304,8 +3305,12 @@ def main(infile, outfile):
             sys.exit(-1)
         start_faulthandler_periodic_traceback()
 
-        # Use the local timezone to convert the timestamp
-        tz = datetime.datetime.now().astimezone().tzinfo
+        tzname = os.environ.get("SPARK_SESSION_LOCAL_TIMEZONE", None)

Review Comment:
   The Arrow-based UDFs already handles the session local timezone, so it may 
be ok to just update `BasePythonUDFRunner.envVars` to have the env var there 
instead of `PythonRunner`?



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