WordPress: Customize CSS if the Post Published Today

I’ve been wanting to add the little calendar graphics to my posts for a while now. I wrote two classes for the date div and set the background image differently based on whether or not the post was written today. Thanks to Michael H in the WordPress Support Forums, I finally got my statement correct! Here’s what I did. I have a background image set for the div class date:

<div class="the_date">

For today’s div, I set a different background image applied to a div class named the_date_today:

<div class="the_date_today">

Now that I’ve got those set, I need to write some code that adds the “_today” if the post was written today:

<div class="the_date<?php $post_date = mysql2date('Ymd', $post->post_date_gmt); if($post_date==gmdate('Ymd')) { echo '_today'; } ?>">

Here’s how this works:

I set a variable called $post_date equal to the date of the post formatted as Ymd.
I write an if statement so that if that variable equals today’s date (formatted as Ymd as well), I add “_today”

Voila! Now I have a calendar graphic that displays whether or not the post was written today! I just need to adjust for timezone and I’ll have it made!

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