Wordpress - putting category and date within a post, below a gallery?

[Victory]

Hi guys,

How can I put the post category and date inside a post, below an image gallery? I found how to do this with the post title, but I don't know where to start with the other stuff.

function mm_insert_title_func($atts) {

global $post;

extract(shortcode_atts(array('before' => '', 'after' => '' ), $atts));

$output = "{$before}{$post->post_title}{$after}";

return $output;

}

add_shortcode('mm-insert-title', 'mm_insert_title_func');

This puts the post title in the main body of the text when I use:

[mm-insert-title before='<h2>' after='</h2>']

...as a shortcode in the post. How do I do a similar thing with the post category and date?

[Victory]

bump.