<?php
date_default_timezone_set('UTC');
$utc = new DateTimeZone('UTC');
$time = DateTime::createFromFormat('Y-m-d H:i:s', '2014-05-19 11:30:00', $utc);
foreach (array('UTC', 'Europe/London', 'BST', 'Etc/GMT+1', 'GMT+1', 'CEST', 'EST', 'GMT-5') as $abbr) {
$zone = new DateTimeZone($abbr);
echo "{$abbr}: {$zone->getOffset($time)}", PHP_EOL;
}
preferences:
46.91 ms | 402 KiB | 5 Q