$date = jDate::forge();

$date = jDate::forge(1333857600);

$date = jDate::forge('last sunday');

$date = jDate::forge('last sunday')->time(); // 1333857600

$date = jDate::forge('last sunday')->format('%B %d، %Y'); // دی 02، 1391

$date = jDate::forge('last sunday')->format('datetime'); // 1391-10-02 00:00:00
$date = jDate::forge('last sunday')->format('date'); // 1391-10-02
$date = jDate::forge('last sunday')->format('time'); // 00:00:00

$date = jDate::forge('2012-10-12')->reforge('+ 3 days')->format('date'); // 1391-07-24

$date = jDate::forge('now - 10 minutes')->ago() // ۱۰ دقیقه پیش