<?php
$response = file_get_contents("https://www.instagram.com/p/BeIWLJ9h97j/?__a=1");
if ($response !== false) {
    $data = json_decode($response, true);
    if ($data !== null) {
        //print_r($data);
       //print_r($data['graphql']['shortcode_media']['taken_at_timestamp']);
       $unixTime=$data['graphql']['shortcode_media']['taken_at_timestamp'];
       $dt = new DateTime("@$unixTime");
       $dt->setTimeZone(new DateTimeZone('America/Chicago'));
       echo $dt->format('F j, Y, g:i a');
       //echo $data['graphql']['shortcode_media']['taken_at_timestamp'];
    }
}
?>