[tz] Rules for TZ+ database

Lester Caine lester at lsces.co.uk
Thu Sep 5 19:48:48 UTC 2013

Paul Eggert wrote:
> Even
> if the tz database were perfect and complete for all past
> time stamps, such a requirement would still go awry with
> time stamps in the future: if someone now schedules a
> meeting for October 1, 13:00, Casablanca time, and Morocco
> changes its rules between now and then, software will mess
> up after the rule change if it blithely relies on UTC
> conversions that were computed before the change.

Which is why the location of every event is important, the housekeeping going 
forward has to take care of the change of time of an event. If this is an 
international event in Casablanca then all of the other delegates need to be 
informed of the time change THAT is the reason for normalized times. If it is 
now an hour earlier or later flight bookings may need changing! Information 
about the CHANGE is critical for a number of reasons.

Lester Caine - G8HFL
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