[tz] please do not enforce limits in code for time zones

Paul Eggert eggert at cs.ucla.edu
Mon Jan 22 19:05:33 UTC 2018

On 01/22/2018 10:55 AM, Steve Allen wrote:
> The traditional calendar for observing at Lick Observatory has always
> had days begin at local noon.  This means that the time zone for the
> Lick calendar is 20 hours behind Greenwich.

You should be OK with tzcode or with any other POSIX-conforming 
implementation, since POSIX requires support for UTC offsets up to 25 
hours. I don't offhand know what tzcode's limits are in this area; at 
some point integer overflow kicks in, if nothing else does.

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