uranusjr commented on code in PR #34683:
URL: https://github.com/apache/airflow/pull/34683#discussion_r1348362770


##########
airflow/serialization/serializers/timezone.py:
##########
@@ -43,21 +48,26 @@ def serialize(o: object) -> tuple[U, str, int, bool]:
     0 without the special case), but passing 0 into ``pendulum.timezone`` does
     not give us UTC (but ``+00:00``).
     """
-    from pendulum.tz.timezone import FixedTimezone, Timezone
+    from pendulum.tz.timezone import FixedTimezone
 
     name = qualname(o)
+
     if isinstance(o, FixedTimezone):
         if o.offset == 0:
             return "UTC", name, __version__, True
         return o.offset, name, __version__, True
 
-    if isinstance(o, Timezone):
-        return o.name, name, __version__, True
+    tz_name = _get_tzinfo_name(cast(datetime.tzinfo, o))

Review Comment:
   What’s the type of `o` here without the cast? Maybe we should instead 
annotate `o` as `tzinfo` in the argument (since we don’t expect to receive 
anything else), or add an `isinstance` check instead.



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