[tz] Fwd: [IANA #636310] how to check a time

Robert Elz kre at munnari.OZ.AU
Fri Nov 30 18:58:43 UTC 2012

    Date:        Thu, 29 Nov 2012 14:28:26 +1300
    From:        Gemma Conn <gemma at biozone.co.nz>
    Message-ID:  <68A00F89-A38E-464A-8B6E-E4A5F7187A1B at biozone.co.nz>

  | Can you point me in the direction of where I can double check that IANA
  | has the correct time for New Zealand?

IANA just provides a home for the timezone project to store & distribute
the timezone database (& associated code), they don't (and don't pretend to)
provide time mapping services.

  | I am worried that IANA has the wrong time for New Zealand,

The database is correct, we believe - it shows summer time starting on the
last Sunday in September, and continuing until the first Sunday in April.
That seems to have been the rule for the past 5 years (from summer of 2007/8).

  | as Google Calendar which claims to use IANA  Time Zone Database,
  | displays the incorrect time for New Zealand.

Can't comment on that, but, using (relatively) current database (no
changes to NZ data have been made any time recently) and I get (a few
minutes ago now)

date -u; TZ=Pacific/Auckland date
Fri Nov 30 18:43:48 UTC 2012
Sat Dec  1 07:43:48 NZDT 2012

That's a 13 hour difference (as it should be).

  | Sorry I could not find the right place to check this on your website 

There is no direct place there to do that.  You could download the database
and code, and test it yourself, r you could just read the source from
the database - but if you're not familiar with the format I don't really
recommend that strategy.

  | I will let Google know if the mistake lies with them.

Assuming it wasn't some kind of error of the investigation, that's
probably what you need to do.


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