<p id="demo"></p>

<script>
function myFunction() {
    var d = new Date();
    var n = d.getDay()
    document.getElementById("demo").innerHTML = n;
}
</script>
<?php
$asd = "<script>myFunction()</script>";
if ( $asd < 6) {
    $vege = "22";
}else{
    $vege = "23";
}
?>