#40960 [Opn->Bgs]: daylight savings offset is incorrect

From: Date: Fri, 30 Mar 2007 15:45:33 +0000
Subject: #40960 [Opn->Bgs]: daylight savings offset is incorrect
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-110966@lists.php.net to get a copy of this message 
 ID:               40960
 Updated by:       derick@php.net
 Reported By:      dave at dtracorp dot com
-Status:           Open
+Status:           Bogus
 Bug Type:         Date/time related
 Operating System: Fedora Core 5
 PHP Version:      5.2.1
 New Comment:

AFAIK Melbourne is either GMT+10 or GMT+11, this is what the TZ
database says:
Australia/Melbourne  Sat Oct 28 15:59:59 2006 UTC = Sun Oct 29 01:59:59
2006 EST isdst=0 gmtoff=36000
Australia/Melbourne  Sat Oct 28 16:00:00 2006 UTC = Sun Oct 29 03:00:00
2006 EST isdst=1 gmtoff=39600
Australia/Melbourne  Sat Mar 24 15:59:59 2007 UTC = Sun Mar 25 02:59:59
2007 EST isdst=1 gmtoff=39600
Australia/Melbourne  Sat Mar 24 16:00:00 2007 UTC = Sun Mar 25 02:00:00
2007 EST isdst=0 gmtoff=36000
Australia/Melbourne  Sat Oct 27 15:59:59 2007 UTC = Sun Oct 28 01:59:59
2007 EST isdst=0 gmtoff=36000
Australia/Melbourne  Sat Oct 27 16:00:00 2007 UTC = Sun Oct 28 03:00:00
2007 EST isdst=1 gmtoff=39600
Australia/Melbourne  Sat Mar 29 15:59:59 2008 UTC = Sun Mar 30 02:59:59
2008 EST isdst=1 gmtoff=39600
Australia/Melbourne  Sat Mar 29 16:00:00 2008 UTC = Sun Mar 30 02:00:00
2008 EST isdst=0 gmtoff=36000

and also:
http://www.worldtimezone.com/time/wtzresult.php?CiID=1225&forma=24h

Please be aware that London is currently NOT on GMT/UTC, but on
BST/UTC+1.


Previous Comments:
------------------------------------------------------------------------

[2007-03-30 14:58:55] dave at dtracorp dot com

Description:
------------
the normal timestamp offset from gmt for melbourne, australia is 36 000
seconds. currently, the offset is 32 400 seconds, as we just clicked off
daylight savings time. so at midnight 2007/03/30 gmt, it should be 9am
2007/03/31.
The DateTime object is displaying the correct time, but the getOffset()
method is giving the incorrect offset. it should be returning 32 400, it
is incorrectly returning 36 000.

Reproduce code:
---------------
$gmtTz = new DateTimeZone("Europe/London");
$localTz = new DateTimeZone('Australia/Melbourne');

$gmtDt = new DateTime("now", $gmtTz);
$localDt = new DateTime("now", $localTz);

echo $localTz->getOffset($gmtDt);

Expected result:
----------------
32400

Actual result:
--------------
36000


------------------------------------------------------------------------


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