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<?php $dateTime = new DateTime('1 day ago', new DateTimeZone('Europe/Amsterdam')); printf("%s\t%s\n", $dateTime->format('Y-m-d H:i:s'), $dateTime->getTimezone()->getOffset($dateTime)); $dateTime->modify('-1 month'); printf("%s\t%s\n", $dateTime->format('Y-m-d H:i:s'), $dateTime->getTimezone()->getOffset($dateTime)); $dateTime->modify('+1 month'); printf("%s\t%s\n", $dateTime->format('Y-m-d H:i:s'), $dateTime->getTimezone()->getOffset($dateTime)); $dateTime->modify('next month'); printf("%s\t%s\n", $dateTime->format('Y-m-d H:i:s'), $dateTime->getTimezone()->getOffset($dateTime));

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