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<?php date_default_timezone_set('UTC'); echo date_default_timezone_get(), PHP_EOL; $utc = new DateTimeZone('UTC'); $time = DateTime::createFromFormat('Y-m-d H:i:s', '2014-05-19 11:30:00'); foreach (['Europe/London', 'BST', 'Etc/GMT+1', 'GMT+1', 'CEST'] as $abbr) { try { $time->setTimezone(new DateTimeZone($abbr)); echo "{$abbr}: {$time->format(DATE_RFC822)}", PHP_EOL; } catch (Exception $e) {} }

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