[tz] Ambiguous abbreviations for Australian timezones when daylight savings is in affect

Tobias Conradi tobias.conradi at gmail.com
Mon Apr 1 22:37:22 UTC 2013

On Mon, Apr 1, 2013 at 4:45 PM, Robert Elz <kre at munnari.oz.au> wrote:
>     Date:        Mon, 1 Apr 2013 14:58:27 +0200
>     From:        Tobias Conradi <tobias.conradi at gmail.com>
>     Message-ID:  <CAAGevbX_K5E174-F5PVXuytbA4cie-+tkhiKiQFaMaz5Oz7uhA at mail.gmail.com>

>>>> I don't think that anybody wants the tz database
>>>> to use different abbreviations from what is in
>>>> common use in Australia.

>>>> Then why the IANA timezone database
>>>> contains EST for Daylight saving
>>>> time in Eastern Australia?

>>> It is "Summer Time" (Eastern Summer Time)
>>> which is what it is called in the
>>> legislation.

>> So it is not EST in the legislation?

> There are no abbreviations in the legislation.
Thanks for the confirmation that your answer didn't relate much to the
question why there is EST in the IANA timezone database..

> Abbreviations
> are not needed at all,
Timothy showed otherwise.

> using them is a mistake.
For sure, if the abbreviations are mistakes.

> You keep missing the point, in Aust there is no such thing as DST,
> there
> is Summer Time.   Eastern Summer Time and Central Summer Time (no Western...)

>   | >(and appropriate here is nothing from the commonwealth govt,
>   | Why?
> Because the commonwealth govt is not responsible for time in Aust,
Mr. Elz, the thread is not about time in Australia but about acronyms.

>   | >  and certainly not the Bureau of Met).
>   | Why?
> They're an agency of the commonwealth govt (see above) with responsibility
> for forecasting the weather (and related issues)
Weather forecasting has been given as a reason by Timothy to have
unambiguous acronyms.

>- if you were to pick a
> national agency that came closer to responsibility for time it would be the
> national measurement lab.
What do they have to do with time zone acronyms?

> But they're intelligent enough not to try and
> step all over state responsibilities.
It is a states responsibility to define unambiguous acronyms for the

Tobias Conradi
Rheinsberger Str. 18
10115 Berlin


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