alamb commented on issue #5827:
URL: https://github.com/apache/arrow-rs/issues/5827#issuecomment-2228791771

   An update here is that we think we have a workaround for our usecase that we 
have added to DataFusion (a `to_local_time` function): 
https://github.com/apache/datafusion/pull/11401
   
   
   I am not sure there is consensus that this change of behavior is desired 
(though it is not clear to me that there is consensus it would not be desired)
   
   
   > Edit: It is perhaps worth noting that in the case of a timestamp on the 
daylight savings boundary, taking the local timestamp instead of UTC as we do 
currently loses information, and casting back to that timezone will yield an 
ambiguous timestamp error. I am not sure if this matters.
   
   This worries me as it sounds like it means it would be impossible to make 
timestamps  roundtripping in all cases
   
   It isn't clear to me that  "never error but doesn't round trip" to "round 
trips but sometimes errors"  is an improvement in functionality


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