What are the advantages and disadvantages of using HTML for formatting output in PHP, especially when dealing with date-related content?

When dealing with date-related content in PHP, it is advantageous to use HTML for formatting output as it allows for more flexibility in styling and presentation. However, it is important to be cautious of mixing PHP and HTML code too closely together, as it can lead to messy and hard-to-maintain code.

<?php
$date = date('Y-m-d H:i:s');
echo "<p>Current date and time: $date</p>";
?>