[tz] [PATCH 0/2] Follow Australian common usage and update CST/CST to CST/CDT and EST/EST to EST/EDT etc [SEC=UNCLASSIFIED]

David Patte ₯ dpatte at relativedata.com
Thu Apr 11 17:33:56 UTC 2013

There is a use case to change them back to the introduction of  daylight 
saving time if it is judged that that that has been the preferred 
abbreviation since that time.

For the same reasons as going forward, a tool (such as a calendar) which 
reports past daylight saving time events remains ambigious for past 
dates if the abbreviations are not put into the database retroactively. 
I don't think its the responsibility of tz to report what tz did in the 
past - but to represent what was in common use in the past.

On 2013-04-11 12:53, Dennis Ferguson wrote:
> Is there a reason to change the historical TZ database abbreviations 
> rather than just making a change which is applied going forward?


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