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<?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) { $local = clone $time; try { $zone = new DateTimeZone($abbr); $local2 = new DateTime('2014-05-19 11:30:00', $zone); $local->setTimezone(new DateTimeZone($abbr)); echo "{$abbr}: {$zone->getOffset($time)} {$local->format('H:i P')}", PHP_EOL; echo "{$abbr}: {$zone->getOffset($time)} {$local2->format('H:i P')}", PHP_EOL; } catch (Exception $e) { echo "{$abbr}: ERROR - {$e->getMessage()}", PHP_EOL; } }

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