Edit report at https://bugs.php.net/bug.php?id=63311&edit=1

 ID:                 63311
 Updated by:         paj...@php.net
 Reported by:        thomas dot mayer at 2bis10 dot de
 Summary:            DateTime::add() adds wrong interval when switching
                     from summer to winter time
 Status:             Open
 Type:               Bug
-Package:            date_time
+Package:            Date/time related
 Operating System:   Windows 7, debian 6
 PHP Version:        5.4.8
 Block user comment: N
 Private report:     N

 New Comment:

Fix cat


Previous Comments:
------------------------------------------------------------------------
[2012-10-19 12:30:18] thomas dot mayer at 2bis10 dot de

Description:
------------
When adding an interval to a DateTime object in european summer time and the 
resulting date is in european winter time, an additional hour is added.

Please note that we stay in summer time(+2) until 3:00:00 and then the clock is 
set to 02:00:00 winter time(+1).

Test script:
---------------
$date = new DateTime(
        '2013-10-27 01:45:00',
        new DateTimeZone('Europe/Berlin')
);
$oldStamp=$date->getTimeStamp();
$interval=new DateInterval('PT15M');
echo $date->format('c')."\n";
echo $date->getTimeStamp()."\n";
$date->add($interval);
echo $date->format('c')."\n";
echo $date->getTimeStamp()."\n";
echo $date->getTimeStamp()-$oldStamp;


Expected result:
----------------
2013-10-27T01:45:00+02:00
1382831100
2013-10-27T02:00:00+01:00
1382835600
4500

Actual result:
--------------
2013-10-27T01:45:00+02:00
1382831100
2013-10-27T02:00:00+02:00
1382832000
900


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



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