Description:
------------
Why microseconds? Is there any option to disable it? Its new at 5.5.14.

# - https://bugs.php.net/bug.php?id=67646

Test script:
---------------
<?php
error_reporting(E_ALL);
$x = new DateTime('now');
$y = new DateTime($x->format('d.m.Y'));
$y->format("Y-m-d H:i:s");

$d = unserialize(serialize($x));


var_dump($d);
var_dump( unserialize(serialize ($y)) );

Expected result:
----------------
object(DateTime)#3 (3) {
  ["date"]=>
  string(26) "2014-07-18 04:20:50"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(13) "Europe/Prague"
}
object(DateTime)#4 (3) {
  ["date"]=>
  string(26) "2014-07-18 00:00:00"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(13) "Europe/Prague"
}

Actual result:
--------------
object(DateTime)#3 (3) {
  ["date"]=>
  string(26) "2014-07-18 04:20:50.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(13) "Europe/Prague"
}
object(DateTime)#4 (3) {
  ["date"]=>
  string(26) "2014-07-18 00:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(13) "Europe/Prague"
}