PHP and Time

Converting Stored TIMESTAMP into User's Local Timezone

date_default_timezone_set('Asia/Tokyo'); // your reference timezone here
$date = date('Y-m-d H:i:s');    // or SELECT date FROM database ...
$usersTimezone = new DateTimeZone('America/Vancouver');
$l10nDate = new DateTime($date);
$l10nDate->setTimeZone($usersTimezone);
echo $l10nDate->format('Y-m-d H:i:s');