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<?php date_default_timezone_set('UTC'); $date = new DateTime('2015-06-23 18:00:00', new DateTimeZone('America/Sao_Paulo')); var_dump($date); $date->setTimezone(new DateTimeZone('-03:00')); var_dump($date); //var_dump($date->getTimestamp()); // comment out, to get the expected result $date->setTimezone(new DateTimeZone('America/Sao_Paulo')); var_dump($date);

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