Re: [Tzdist] [tz] Timezone in Brazil

Paul Eggert <eggert@cs.ucla.edu> Sun, 11 October 2015 21:12 UTC

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To: Lester Caine <lester@lsces.co.uk>
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From: Paul Eggert <eggert@cs.ucla.edu>
Organization: UCLA Computer Science Department
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Date: Sun, 11 Oct 2015 14:12:32 -0700
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Cc: Time Zone Data Distribution Service <tzdist@ietf.org>
Subject: Re: [Tzdist] [tz] Timezone in Brazil
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Lester Caine wrote:
> tzdb should only be published with a
> 1970 start date and anything prior to that is unreliable

No, many tzdata entries before 1970 are quite reliable.  True, tzdata entries 
tend to become less reliable the further back one goes in time, but this is 
merely a tendency.  For example, the data for England in 1915 is far more 
reliable than the data for Baja California state in 2015.