How to convert negative timestamp to date (PHP) -

i want convert negative timestamp value human readable value. code:

$timestamp = -30607469951;     $date = new datetime();     $date->settimestamp($timestamp);  $date->format('j/n/y'); 

all did echo out formatted $date, wanted?

$timestamp = -30607469951;  $date = new datetime();  $date->settimestamp($timestamp);  echo $date->format('y-m-d');