<?php echo date("D M d,Y"); ?>

<form method="post" action="post.php">
entry title: <input type='text' name='entry_title'><br />
entry<br />
entry:<textarea rows="15" cols="45" name="entry"></textarea><br />
<input type='hidden' name='entry_date' value='<?php echo date("D M d,Y"); ?>'>
<input type="Submit" value="Submit" class="buttonformat">