PHP display content based on day and timeframe - php

Question

I need to display the ON AIR CONTENT every Friday at 9pm and then stop at 12am and revert back to the OFF AIR CONTENT. 
Below are the 2 sets of code that I manually change to make this possible. If I get the right code I can automate this.
Can anyone help me?
/* ON AIR CONTENT*/
function banner_rotator() {
if (is_home()) { ?>
<div id="rotator"><iframe width="630" height="386" src="http://www.ustream.tv/embed/8805257?v=3&wmode=direct?autoplay=true" scrolling="no" frameborder="0" style="border: 0px none transparent;"> </iframe> <?php if(function_exists('vslider')){ vslider('frontpage'); } ?></div>
<div class="main">
<!-- FIFTH EXAMPLE -->
<div class="view view-fifth">
<img src="../1.jpg" />
<div class="mask">
<h2>FULLY LOADED 2012</h2>
<p>This event has been cancelled.</p>
Details
</div>
</div>
<div class="view view-fifth">
<img src="../2.jpg" />
<div class="mask">
<h2>KAFINAL - FALLING IN LOVE</h2>
<p>"The feedback to Falling in Love has been tremendous all over. I am getting calls from people in Jamaica, the Caribbean and even in the States...</p>
Read More
</div>
</div>
</div>
<?php }
}
add_action('thesis_hook_before_content', 'banner_rotator');
_____________________________________________________________________________________
/* OFF AIR CONTENT */
function banner_rotator() {
if (is_home()) { ?>
<div id="rotator"> <?php if(function_exists('vslider')){ vslider('frontpage'); } ?></div>
<div class="main">
<!-- FIFTH EXAMPLE -->
<div class="view view-fifth">
<img src="../1.jpg" alt="FULLY LOADED 2012" title="FULLY LOADED 2012" />
<div class="mask">
<h2>FULLY LOADED 2012</h2>
<p>This event has been cancelled.</p>
Details
</div>
</div>
<div class="view view-fifth">
<img src="../2.jpg" alt="KAFINAL - FALLING IN LOVE" title="FULLY LOADED 2012" />
<div class="mask">
<h2>KAFINAL - FALLING IN LOVE</h2>
<p>"The feedback to Falling in Love has been tremendous all over. I am getting calls from people in Jamaica, the Caribbean and even in the States...</p>
Read More
</div>
</div>
</div>
<?php }
}
add_action('thesis_hook_before_content', 'banner_rotator');

Answer 1

The PHP date("G") function will give you the time in 24 hour format as a string. You may then test that and make whatever decisions you would like.