BuddyPress.org

This should work:

`<?php
global $bp;
$currentuser = get_userdata( $bp->displayed_user->id );
$joined= date(“F jS, Y”, strtotime($currentuser ->user_registered));
echo ‘‘ . $joined . ‘‘;
?>`

Just replace the span tag with whatever html you need. You could also enclose this in a function added to your functions.php file and call it from there.