[fel64]

Paste in

<?php global $post;

$lalaposttime = date( 'D M Y', strtotime( $post->post_id ) );

echo $lalaposttime; ?>

anywhere you like outside other <?php ... ?> tags. So you could put it next to the code snippet you quoted. If you use Notepad 2 or something it makes it a lot easier by colour-coding these things.

The fact that it’s spread out over several lines doesn’t make a difference when it’s inside the <?php ... ?> tags.