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<?php date_default_timezone_set('America/New_York'); $InitialDateTime = DateTime::createFromFormat('U', '1409611999'); $firstDayofWeek = clone $InitialDateTime; $firstDayofWeek->modify('Monday This Week'); $lastDayofWeek = clone $InitialDateTime; $lastDayofWeek->modify('Saturday This Week'); var_dump($initialDateTime, $firstDayofWeek, $lastDayofWeek);

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