Can this script be modified to return true beginning on Saturday at 4am eastern time until anytime on Wednesday. Would eastern time be "$estime"?

CODE
<?php
//place this somewhere in your web page before the "On the air" section below
function onAir() {
//PHP's time() function adds the time zone, so adjust for that
$gmtime=time() - date('Z');
//if today is Sunday, return false
if(date('w',$gmtime)==0) {
return FALSE;
}
$hour=date('H',$gmtime);
if($hour> 2 AND $hour< 7) {
return TRUE;
}
return FALSE;
}
?>

Now, you just use the function above to decide whether to display "On Air" or "Off the Air."

<?php
if (onAir()) {
?>
<h2>ON THE AIR</h2>
<?php
} else {
?>
<h2>OFF THE AIR</h2>
<?php
}
?>

/CODE