diff($dt2)->format('%a') . ' Days' . PHP_EOL;echo 'EU/ZU : ' . $dt1->diff($dt2)->format('%m') . ' Months' . PHP_EOL . PHP_EOL;$tz = new DateTimeZone("UTC");$dt1 = new Datetime('2019-01-01', $tz);$dt2 = new Datetime('2019-05-01', $tz);echo 'UTC : ' . $dt1->diff($dt2)->format('%a') . ' Days' . PHP_EOL;echo 'UTC : ' . $dt1->diff($dt2)->format('%m') . ' Months' . PHP_EOL;출력결과 EU/ZU : 120 DaysEU/ZU :..