override expiration text for Set Expiration Date Add On for Paid Memberships Pro

override-set-expiration-text.php

/*
	Change expiration text on levels page.
*/
function pmprosed_my_pmpro_level_expiration_text($expiration_text, $level)
{
    $set_expiration_date = pmpro_getSetExpirationDate($level->id);
    if (!empty($set_expiration_date)) {
        $set_expiration_date = pmprosed_fixDate($set_expiration_date);
        $expiration_text = "This membership level will expire on " . date(get_option('date_format'), strtotime($set_expiration_date, current_time('timestamp'))) . ".";
    }
    return $expiration_text;
}
add_filter('pmpro_level_expiration_text', 'pmprosed_my_pmpro_level_expiration_text', 20, 2);