[tz] Summer time during WW2 for Europe/Zagreb

First Name disponiblekonto at yahoo.com
Mon Dec 12 11:19:02 UTC 2011


I apologize for not replying sooner. Thanks everybody for your help. I think I can pin point this bug to Firefox not accounting for _double_ summer time.

Kind regards

 From: David Keegel <djk at cyber.com.au>
To: Miro <disponiblekonto at yahoo.com> 
Cc: tz at iana.org 
Sent: Friday, December 2, 2011 10:07 PM
Subject: Re: [tz] Summer time during WW2 for Europe/Zagreb
On Fri, Dec 02, 2011 at 10:11:18AM +0000, Miro wrote:
> I'd like to ask a question regarding Europe/Zagreb timezone for years 1941-1945.
> I actually reported a bug in Firefox but that turned out not to be the case.
> I'll leave url just in case you need more information:
> https://bugzilla.mozilla.org/show_bug.cgi?id=704486

You can see the transitions for Europe/Zagreb between 1940 and 1946
(according to the tz data installed on your system) like this :-
    zdump -v -c1940,1946 Europe/Zagreb

For each transition, that will show the time (UTC and local) one second 
before and at the transition.  In between those transitions, the offset 
and time zone abbreviation remain the same.

That should help you isolate whether you have a problem with the tz data
installed on your system, or with Firefox's interpretation of tz data.
If the offset in Firefox disagrees with the offset in zdump and Firefox
is supposed to use tz data then Firefox has a bug.

PS: The "Europe/Zagreb" argument to zdump is a time zone name (like you
would put in $TZ) not a file name.

  David Keegel <djk at cyber.com.au>        Cyber IT Solutions Pty. Ltd.  
   http://www.cyber.com.au/~djk/     Linux & Unix Systems Administration 
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