[GitHub] [arrow] emkornfield commented on pull request #7604: ARROW-9223: [Python] Propagate timezone information in pandas conversion

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emkornfield commented on pull request #7604:
URL: https://github.com/apache/arrow/pull/7604#issuecomment-653081545


   > > > For timezone naive Timestamps, I'm not sure if we should be adjusting the datetime to reflect UTC converted to system time zone. thoughts?
   > > 
   > > 
   > > I don't think we should do that (it would also be a big break). Tz-naive timestamps have no timezone and should therefore be left as is IMO (applications on top of Arrow can choose to use the "naive means system time zone" behaviour, but I would say that Arrow itself should never deal with the system time zone)
   > 
   > You've probably seen this, but this is what our docs say about timezone-naive data: http://arrow.apache.org/docs/cpp/api/datatype.html#_CPPv4N5arrow13TimestampTypeE
   > 
   > (Side note: do our doc URLs have to be so ugly?)
   > 
   > I agree with Joris that at this level, we should not do any localizing of timezone-naive data.
   
   Please see reply: https://github.com/apache/arrow/pull/7604#discussion_r449096333
   
   I haven't looked in the code deeply but this might an overall bug, or at least idiosyncrasy, with our conversion to/from datetime (not accounting for system timezone).


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