FullCalendar is a nice find.

Looks to me like you'll need to write a shortcode (which I show how to do here):

• Adding an Archive of Posts to the Navigation Menu in WordPress 3.0

And then generate the code to call the FullCalendar within the shortcode.

After that you'll need to write code to generate a Javascript array or have it references a JSON feed:

• Full Calendar Events (as an array)
• Full Calendar Events (as an json feed)

Here's code you can put into a standalone .PHP file which you could call /fullcalendar-json-feed.php or whatever you like. The code queries a custom post types called event which will run in the root directory of your website and will generate a JSON feed and it assumes you've got some custom fields needed to populate the array/feed. (I'm going to leave the rest of the query and custom field details to you. Note I didn't actually test this with FullCalendar so it might take a bit of tweaking):

<?php
/*
* See: http://wordpress.stackexchange.com/questions/1447/
*
*/
include "wp-load.php";
global $wpdb;
header('Content-Type:application/json');
$events = array();
$result = new WP_Query('post_type=event&posts_per_page=-1');
foreach($result->posts as $post) {
  $events[] = array(
    'title'   => $post->post_title,
    'start'   => get_post_meta($post->ID,'_start_datetime',true),
    'end'     => get_post_meta($post->ID,'_end_datetime',true),
    'allDay'  => (get_post_meta($post->ID,'_all_day',true) ? 'true' : 'false'),
    );
}
echo json_encode($events);
exit;

You can generate the array option with very similar code to that above. Still, this is going to take a bit of coding for you to get right. Maybe you just want to use a solution that's already built? Here's a Q&A discussion about calendars for WordPress:

• Recommendation for a WordPress Calendar Plugin with Recurring Events?

FullCalendar is a nice find.

Looks to me like you'll need to write a shortcode (which I show how to do here):

• Adding an Archive of Posts to the Navigation Menu in WordPress 3.0

And then generate the code to call the FullCalendar within the shortcode.

After that you'll need to write code to generate a Javascript array or have it references a JSON feed:

• Full Calendar Events (as an array)
• Full Calendar Events (as an json feed)

Here's code you can put into a standalone .PHP file which you could call /fullcalendar-json-feed.php or whatever you like. The code queries a custom post types called event which will run in the root directory of your website and will generate a JSON feed and it assumes you've got some custom fields needed to populate the array/feed. (I'm going to leave the rest of the query and custom field details to you. Note I didn't actually test this with FullCalendar so it might take a bit of tweaking):

<?php
/*
* See: https://wordpress.stackexchange.com/questions/1447/
*
*/
include "wp-load.php";
global $wpdb;
header('Content-Type:application/json');
$events = array();
$result = new WP_Query('post_type=event&posts_per_page=-1');
foreach($result->posts as $post) {
  $events[] = array(
    'title'   => $post->post_title,
    'start'   => get_post_meta($post->ID,'_start_datetime',true),
    'end'     => get_post_meta($post->ID,'_end_datetime',true),
    'allDay'  => (get_post_meta($post->ID,'_all_day',true) ? 'true' : 'false'),
    );
}
echo json_encode($events);
exit;

You can generate the array option with very similar code to that above. Still, this is going to take a bit of coding for you to get right. Maybe you just want to use a solution that's already built? Here's a Q&A discussion about calendars for WordPress:

• Recommendation for a WordPress Calendar Plugin with Recurring Events?