Auto Rotating Banner

[WWWD]

I want to bring this feature from my current site into ZenCart:

I run a query:

$query_Masthead = "SELECT Alt, Address FROM mastheads WHERE CURDATE() >= BeginDate AND CURDATE() <= EndDate LIMIT 0, 30 ";
$URL = $row['Address'];
     $ALT = $row['Alt'];

$Masthead = mysql_query($query_Masthead, $whatwouldwaltdo) or die(mysql_error());
$row_Masthead = mysql_fetch_assoc($Masthead);
$totalRows_Masthead = mysql_num_rows($Masthead);
$URL = $row['URL'];
$ALT = $row['Alt']; 

Then, where the current logo.jpg appears, I want to instead insert:

"><img src = "<?php echo $row_Masthead['Address']; ?>" Alt = "<?php echo $row_Masthead['Alt'] ?>"/>

Basically, it changes the my company's logo based on pre-defined holidays, a la Google.

How can I do this in ZenCart?

[WWWD]

Okay, I used the native functionality of Banner Manager to create the rotating logo.

However, even though I have start and end dates to trigger the various switching back and forth, they all appear even though it's not their time based on the parameters! I have had to turn all of them inactive except the one that is appropriate!

http://whatwouldwaltdo.com