Description:
------------
Time Formats: tz format (JST, UTC, GMT, EST...) has problem. maybe wrong (+/-)


Test script:
---------------
[Date]
; Defines the default timezone used by the date functions
date.timezone = "Asia/Tokyo"


<?php
$now = time();

$local  = date("Y-m-d H:i:s",$now);
$gmdate = gmdate("Y-m-d H:i:s",$now);

$tz  = date_default_timezone_get();
$jst = date("Y-m-d H:i:s", strtotime("JST",$now));
$gmt = date("Y-m-d H:i:s", strtotime("GMT",$now));
$utc = date("Y-m-d H:i:s", strtotime("UTC",$now));
$est = date("Y-m-d H:i:s", strtotime("EST",$now));
$edt = date("Y-m-d H:i:s", strtotime("EDT",$now));

echo "
[TIMEZONE:{$tz}]
  DATE: {$local}
GMDATE: {$gmdate}
----
GMT: {$gmt}
UTC: {$utc}
JST: {$jst} (UTC +9)
EDT: {$edt} (UTC -4)
EST: {$est} (UTC -5)
";


Expected result:
----------------
[TIMEZONE:Asia/Tokyo]
  DATE: 2010-07-06 11:58:03
GMDATE: 2010-07-06 02:58:03
----
GMT: 2010-07-06 20:58:03
UTC: 2010-07-06 20:58:03
JST: 2010-07-06 11:58:03 (UTC +9)
EDT: 2010-07-07 00:58:03 (UTC -4)
EST: 2010-07-07 01:58:03 (UTC -5)


Actual result:
--------------
[TIMEZONE:Asia/Tokyo]
  DATE: 2010-07-06 11:58:03
GMDATE: 2010-07-06 02:58:03
----
GMT: 2010-07-06 02:58:03
UTC: 2010-07-06 02:58:03
JST: 2010-07-06 11:58:03 (UTC +9)
EDT: 2010-07-05 22:58:03 (UTC -4)
EST: 2010-07-05 21:58:03 (UTC -5)