{{timestamp}}

/action/timestamp.php

<?php
    $arrDay = array ("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
    echo $arrDay[date(w)];
    echo date(", d.m.Y H:i");

{{cw}}

calendar week

/action/cw.php

<?php
    echo 'Week ' . date('W');