Get the date a user registered

https://uk.php.net/manual/en/function.mktime.php
https://uk.php.net/manual/en/function.date.php
https://uk.php.net/manual/en/function.strtotime.php

Was looking for the same thing. This worked for me anyway:

if(isset($_GET['author_name'])) {
    $author_meta = get_userdatabylogin(get_the_author_login());
} else {
    $author_meta = get_userdata(intval($author));
}

$author_registered = $author_meta->user_registered;
if($author_registered){
    echo date("n/j/Y", strtotime($author_registered));
}

CONVERT USER_REGISTERED VARIABLE
date("n/j/Y", strtotime(VARIABLE HERE))

Thanks for the input guys, using the below for now until I can find anything shorter –

$date = $wpdb->get_var($wpdb->prepare('SELECT user_registered FROM '.$wpdb->users.' WHERE ID="'.$id.'"'));
$date = explode(' ', $date);
$date = explode('-', $date[0]);
return $date[2].'/'.$date[1].'/'.$date[0];

This worked for me

$registered = ($user_info->user_registered . "\n");
  echo date("n/j/Y", strtotime($registered)); ?>